(;SZ[19]C[Kogo's Joseki Dictionary
Var 1: 3-3
Var 2: 3-4
Var 3: 4-4
Var 4: 5-3
Var 5: 5-4
Var 6: 6-3
Var 7: 6-4
Var 8: 5-5

Choosing a joseki:
Since josekis work effectively in a certain direction, examine positions at adjacent corners and sides before choosing a joseki. The opposite corner matters only if a ladder is involved. Some guidelines:
1. Have support for a fight - A high position provides support, a low position does not.
2. Take the side with most value -
2a. A juncture point for both sides is of great value.
2b. A side where making territory is uncertain is of little value.
3. Consider strategic balance.]GN[Kogo's Joseki Dictionary
]GC[No commercial distribution without permission. 

Contact kogo@waterfire.us. Updates available at: http://waterfire.us/joseki.htm.

Copyright 1998-2003 by Gary Odom. Portions copyright 2000-2001 by Stefan Verstraeten. 
]DT[2003.09.30]
(;B[qc]AE[jd][jc][nl]LB[pd:a][oc:b][nd:c][od:d][nc:e][pc:f]N[san-san (3-3 point)]C[The san-san (3-3) point, emphasizing territory at the expense of influence (especially following an approach at 'a'). 

All joseki for the 3-3 point are relatively simple.

White approaches are 'a' to 'c'. White 'b' to 'e' are played when the top side is favored (such as an extension).]
(;W[pd]LB[qd:a][oc:b][ob:c]N[katatsuki (shoulder hit) (a)]C[The shoulder-hit is the traditional answer to the 3-3.

The direction of Black 3 depends on the positions on the side.

Crawling once may be the premise for a follow-up move of sliding with a knight's move in the opposite direction. If Black plays 3 at 'a' (to the right), the follow-on knight's move is then played at the top. Black's knight's move reduces territory potential on the side it is played. 

Given a White stone at top, White 2 would be a mistake. In such a case, White should have played an extension from that stone, rather than White 2.

Black joseki continues with 'a'. Black 'b' and 'c' show a special strategy.

For variations of Black playing elsewhere, see variation 3-5.]
(;B[qd]LB[pe:a][pf:b][pc:c]AE[jc]C[White continues with 'a' or 'b'. White 'c' is a mistake.]
(;W[pe]LB[ob:a][pc:b][qf:c][qe:d][oc:e][nc:f][dp:g]N[nobi (extension) (a)]C[Black continues with 'a' to 'c'. Black 'd' is seen occasionally in amateur games.

Black 'a' and 'b' favor the top, while Black 'c' (and 'd') emphasize the right side (to the potential sacrifice of giving White thickness at the top).

Black 'e' and 'f' are not recommended.

Black 'g' shows Black playing elsewhere.

g7, f6, e5, d4, c3, b2, a1

]
(;B[ob]LB[md:a][qe:b][nc:c][pj:d][dp:e]N[keima (knight's move) (a)]C[White continues with 'a' or 'b'. White 'c' is a mistake, as White's stones are disconnected.

White 'd' shows a special strategy.

White 'e' shows White playing elsewhere.]
(;W[md]LB[rf:a][nd:b][qf:c][dp:d]N[niken-tobi (1-space jump) (a)]C[
Black continues with 'a' to 'c'. 'b' and 'c' are played if Black wants to emphasize the top.

Black may also play elsewhere ('d').]
(;B[rf]N[right side (a)];W[ph])
(;B[nd]N[top (b)];W[ne];B[nc];W[me];B[lc];W[qe])
(;B[qf]N[(c)]LB[qe:a][og:b]C[White continues with 'a' or 'b'.]
(;W[qe]N[(a)];B[re];W[rf];B[rg];W[pf];B[qg];W[pc];B[pb];W[rd];B[sf];W[qb];B[rc];W[rb]
;B[sd];W[nb];B[nc];W[mb];B[oc];W[nd])
(;W[og]N[(b)]LB[qg:a][dp:b]C[Black continues with 'a', or plays elsewhere.]
(;B[qg]N[(a)])
(;B[]C[Black plays elsewhere.]N[tenuki (b)];W[qg];B[rf])))
(;B[]C[Black plays elsewhere.]N[Black tenuki (d)];W[qe]LB[nd:a][nc:b][dp:c]C[Black continues locally with 'a' or 'b'. Black may also play elsewhere ('c').]
(;B[nd]N[(a)];W[ne];B[nc];W[mf];B[le];W[me];B[lc];W[ld];B[kc])
(;B[nc]N[(b)];W[nd];B[lc])
(;B[]N[Black tenuki (c)]LB[nc:a][mb:b]C[Black plays elsewhere.

White continues with 'a' or 'b'.]
(;W[nc]N[(a)];B[nb];W[mb];B[oc];W[od];B[]C[Black plays elsewhere.]N[Black tenuki];W[re];B[rb])
(;W[mb]N[(b)];B[re];W[rf];B[rd]))))
(;W[qe]N[White top (b)]LB[nd:a][pi:b][dp:c]C[White emphasizes the top with 6.

Black continues with 'a' or 'b'.

'c' shows continuation when Black plays elsewhere.]
(;B[nd]LB[qi:a][nc:b][ne:c]C[Black 7 is absolutely necessary. 

White continues with 'a'. White 'b', an amateur innovation, is a trick play. White 'c' is also possible.]N[(a)]
(;W[qi]N[3-space extension (a)])
(;W[nc]C[White 8 is a trick play.]N[trick (b)];B[oc];W[mc];B[od];W[qi]C[Now Black may harass the two White stones, or play elsewhere.])
(;W[ne]N[(c)];B[me]LB[mf:a][nf:b]C[White continues with 'a' or 'b'.]
(;W[mf]LB[le:a][nf:b]C[Black continues with 'a' or 'b'.]N[(a)]
(;B[le]N[(a)];W[ng])
(;B[nf]N[(b)];W[ng];B[oe];W[of];B[ne];W[og];B[mg];W[lf];B[mh];W[le];B[nc];W[pj];B[kh]
))
(;W[nf]N[(b)];B[ld])))
(;B[pi]N[(b)]LB[md:a][qk:b]C[White continues with 'a', possibly 'b'.]
(;W[md]N[(a)])
(;W[qk]C[White 8 works with support in the lower right corner.]N[(b)];B[nd];W[pg];B[pk];W[qj];B[pj];W[qi];B[pl]))
(;B[]C[Black plays elsewhere.]N[Black tenuki (c)];W[nc];B[oc];W[ne];B[nd]))
(;W[nc]C[White 6 is a mistake.]N[mistake (c)];B[qe]LB[qf:a][pg:b]C[White continues with 'a' or 'b'.]
(;W[qf]N[hane (a)];B[pf]C[Black 9 works however White decides to continue owing to White 6 lacking sufficient connection to White 2,4.];W[qg]C[A likely continuation by White.];B[oc];W[nd];B[od]LB[of:a][oe:b]C[White may try 'a' or 'b'.]
(;W[of]N[(a)];B[oe]LB[pg:a][ne:b]C['a' and 'b' are miai. Black has a large corner and is out in the center, while White has splintered groups.])
(;W[oe]N[(b)];B[ne]LB[nf:a][of:b]C[Black must cut at 15. White may try 'a' or 'b'. Either way, Black takes the two White stones at top or White suffers for trying to save them.]
(;W[nf]N[(a)];B[me];W[of];B[mc])
(;W[of]N[(b)];B[me]LB[lc:a][ld:b]C[White may try 'a' or 'b' to save the two top stones. Both leave White at a loss.]
(;W[lc]N[(a)];B[ld]LB[mc:a][mb:b][kc:c]C[Black's aim is 'a'. White continues with 'a' or 'b'. White 'c' does not work.]
(;W[mc]N[(a)];B[kc];W[kd];B[ke];W[kb];B[jd];W[jc];B[kd];W[ic])
(;W[mb]LB[mc:a][kd:b][kc:c]C[Black continues with 'a' to 'c'.]
(;B[mc]N[(a)];W[nb];B[kc];W[md];B[ke];W[kb];B[jc])
(;B[kd]N[(b)];W[kc];B[jc];W[jb];B[ic];W[ib];B[hc])
(;B[kc];W[kd];B[mc];W[md];B[le];W[kb];B[jc];W[jb];B[nb];W[mc];B[ma];W[lb];B[ic]
))
(;W[kc]C[White 20 is a mistake, leading to a snapback capture.]N[mistake (c)];B[mc];W[mb];B[nb];W[md];B[mc]))
(;W[ld]N[(b)];B[md];W[mc];B[lc]C[White cannot save the three stones.]))))
(;W[pg]N[ikken tobi (1-space jump) (b)];B[qf]))
(;W[pj]N[(d)]LB[qe:a][qf:b]C[White 6 puts emphasis on the lower right.

Black continues with 'a' or 'b'.]
(;B[qe]N[(a)];W[pf];B[qf];W[pg])
(;B[qf]N[(b)];W[pf];B[qg];W[pg];B[ph];W[qe];B[re];W[qh];B[oh];W[pc];B[pb];W[rd];B[rf]
;W[rc];B[qb];W[qi];B[rh];W[me]))
(;W[]C[White plays elsewhere.]N[White tenuki (e)];B[nd];W[ph];B[pj];W[ne];B[me];W[mf];B[nf];W[ng];B[oe];W[of];B[ne];W[nj]
;B[om];W[mg];B[ke]))
(;B[pc]LB[nd:a][qe:b][oc:c][md:d]C[Kitani Minoru invariably played this way.  Black 5 is thicker than the knight's move, but White also gets good shape. 'a' is joseki; 'b' and 'c' are not. White 'd' is an overplay.]N[magari (turn) (b)]
(;W[nd]N[ikken tobi (1-space jump) (a)];B[oc]LB[mf:a][nc:b][le:c][me:d][ne:e]C[White continues with 'a', 'c' or 'd'. White 'b' is unreasonable without the preparation move at 'c'. White 'e' avoids probes, but is not efficient shape.]
(;W[mf]N[(a)]LB[mc:a][qf:b]C[Black continues with 'a' or 'b'.]
(;B[mc]N[(a)]LB[qe:a][dp:b]C[White continues with 'a'. Variation 'b' shows White playing elsewhere.]
(;W[qe]N[(a)])
(;W[]C[White plays elsewhere.]N[White tenuki (b)];B[md]LB[me:a][jd:b]C[White plays 'a' to emphasize influence and get sente. With White 'b', White sacrifices for influence.]
(;W[me]N[(a)];B[kd])
(;W[jd]C[White is prepared to sacrifice for influence.]N[(b)];B[nf];W[ng];B[of];W[me];B[ne];W[og];B[pf];W[pg];B[qf];W[qg];B[rf]
;W[ke])))
(;B[qf]N[(b)]LB[nc:a][dp:b]C[White continues with 'a'. 'b' shows White playing elsewhere.]
(;W[nc]N[(a)])
(;W[]C[White plays elsewhere.]N[White tenuki (b)];B[pf]LB[nc:a][of:b]C[White continues with 'a' or 'b'.]
(;W[nc]N[(a)])
(;W[of]N[(b)];B[og];W[nf];B[ph]))))
(;W[nc]C[White 8 is unreasonable.]N[mistake (b)];B[od];W[oe];B[ne]C[White is cut in two. Black has a secure corner and better prospects in the fight ahead.])
(;W[le]N[(c)]LB[qf:a][nc:b]C[Black continues with 'a' or 'b'.]
(;B[qf]N[(a)];W[nc])
(;B[nc]N[(b)]LB[qe:a][nf:b][md:c]C[White continues with 'a' to 'c'.]
(;W[qe]N[(a)];B[md];W[me];B[od];W[oe];B[ne];W[nf])
(;W[nf]N[(b)];B[qf];W[lc];B[od];W[oe];B[md];W[ld];B[ne];W[me])
(;W[md];B[nf];W[ne];B[qf])))
(;W[me]N[(d)];B[nf];W[ne];B[qf])
(;W[ne]C[White 'e' avoids probing moves by Black, but is not otherwise efficient shape.]N[(e)];B[qf]))
(;W[qe]N[not good (b)];B[od];W[oe];B[nd];W[qi];B[jc])
(;W[oc]LB[nc:a][ob:b][qf:c][od:d]N[not good (c)]C[White 6 is not recommended.

Black continues with 'a'. Black 'b' is submissive.

Black 'c' or 'd' are playable if Black wants the right side (and abandon the top).

]
(;B[nc]N[(a)];W[ob];B[od]LB[nd:a][nb:b]C[White plays 'a' if the ladder to capture Black 9 is unfavorable, and 'b' if the ladder is favorable.]
(;W[nd]C[White plays this way when the ladder is unfavorable.]N[Black ladder (a)];B[oe]LB[mc:a][pf:b]C[White continues with 'a'. White 'b' is something of a trick play; a ladder is involved.]
(;W[mc]N[(a)];B[ne];W[md];B[pf])
(;W[pf]N[(b)]LB[ne:a][nb:b]C[Black plays 'a' if the Black stones can be caught in a ladder, or can play 'b' if not.]
(;B[ne]N[(a)];W[nb];B[mc];W[mb];B[lc];W[lb];B[kc];W[jb];B[kb];W[ka];B[jc];W[ib];B[pb]
;W[qe];B[re];W[rf];B[sd])
(;B[nb]N[Black ladder (b)]C[Black must have the ladder to play this way.];W[of];B[ne]LB[md:a][nf:b]C[White 'a' and 'b' are the unpleasant alternatives.]
(;W[md]N[(a)];B[mf])
(;W[nf]N[(b)];B[me]))))
(;W[nb]C[White plays this way when the ladder is favorable.]N[White ladder (b)];B[mc]LB[nd:a][mb:b]C[White continues with 'a'. White 'b' is a mistake.]
(;W[nd]N[(a)];B[oe];W[md]LB[pf:a][mb:b]C[Black continues with 'a'. Black 'b' gives White superior thickness.]
(;B[pf]N[(a)];W[lc])
(;B[mb]C[Black 15 is not recommended.]N[not good (b)];W[lc];B[lb];W[kb];B[kc];W[ld];B[jb];W[of];B[ne];W[ka];B[ja];W[kd]
;B[pb];W[nf];B[me];W[lf];B[pf];W[qe];B[oa];W[mf];B[na];W[le];B[oc];W[pg];B[jc]
;W[qf]))
(;W[mb]C[White 12 is a mistake.]N[mistake (b)];B[lc]LB[lb:a][qe:b]C[White continues with 'a'. White 'b' compounds the mistake.]
(;W[lb]N[(a)];B[qe]LB[kc:a][pf:b]C[White continues with 'a' or 'b'.]
(;W[kc]N[(a)];B[me])
(;W[pf]N[(b)];B[nd];W[kc];B[qf];W[nf];B[kd];W[jd];B[ke];W[je];B[kf];W[oh];B[jf];W[qg]
;B[rg];W[qh]))
(;W[qe]C[White 14 is a mistake.]N[mistake (b)];B[lb]C[White's four stones are lost.]))))
(;B[ob]C[Black 7, crawling along the second line, is weak.]N[mistake (b)];W[nc];B[nb];W[mc];B[qf];W[og];B[qg])
(;B[qf]N[(c)];W[ob]LB[qg:a][pf:b]C[Black plays simply with 'a', or pushes with 'b'.]
(;B[qg]N[(a)];W[ne])
(;B[pf]N[(b)];W[of];B[og];W[nf];B[ng];W[mf];B[qe];W[mg]))
(;B[od]N[(d)];W[nc]LB[qf:a][nd:b]C[Black continues with 'a'. Black 'b' is not recommended.]
(;B[qf]N[(a)];W[pf];B[pg]LB[ne:a][qe:b]C[White continues with 'a'. White 'b' is a mistake.]
(;W[ne]N[(a)];B[qe])
(;W[qe]C[White 12 is a fatal mistake.]N[mistake (b)];B[re];W[rf];B[qg];W[rd];B[se];W[sd];B[of];W[sf];B[re];W[se];B[oe]
;W[re];B[rc];W[rh];B[rg];W[sg];B[sc];W[sh];B[qi];W[ri];B[rj]))
(;B[nd]C[Black 9 is not recommended.]N[not good (b)];W[mc];B[md];W[lc];B[pf];W[oe];B[qe];W[of];B[ld];W[kd];B[lf];W[ke]
;B[mg];W[pg];B[qf];W[oh])))
(;W[md]LB[qf:a][mb:b]C[White 6 is an overplay. Depending on the side of value, Black continues with 'a' or 'b' locally, or plays elsewhere.]N[overplay (d)]))
(;B[qf]LB[pc:a][qe:b][og:c][dp:d]N[ikken tobi (c)]C[White continues with 'a', possibly 'b'. White 'c' is premature.

White 'd' shows continuation if White plays elsewhere.]
(;W[pc]LB[qe:a][pf:b][qg:c][qb:d]C[Black possibilities are 'a' to 'd'. Black 'a' is solid, and recommended. Black 'b' provokes White 'a', a rather unnecessary provocation. Black 'c' has no advantage over 'a'. Black 'd' is recommended only if the right side has no promise for Black, and 'd' could be sente (because the top has value).]N[(a)]
(;B[qe]N[(a)];W[kc]LB[og:a][pj:b][qj:c]C[Black may play elsewhere, or locally at 'a', or around 'b' or 'c'.]
(;B[og]C[Black 9 is one local possibility, depending on support in the lower right.]N[(a)])
(;B[pj]C[Black 9 is high, a nice extension from Black 5, but a bit thin.]N[(b)])
(;B[qj]C[Black 9 is low, but may make sense strategically.]N[(c)]))
(;B[pf]N[(b)]LB[qe:a][of:b]C[Black 7 provokes White to cut.

White continues with 'a', or shows restraint with 'b', depending on support towards the top-left.]
(;W[qe]N[(a)];B[re]LB[rd:a][rf:b]C[White continues with 'a' or 'b'.]
(;W[rd]N[(a)];B[rc];W[rf];B[sd]LB[of:a][rg:b]C[White continues with 'a'. White 'b' is unreasonable.]
(;W[of]N[(a)];B[rg])
(;W[rg]C[White 14 is unreasonable.]N[mistake (b)];B[of];W[md];B[qh];W[rh];B[qi];W[ri];B[qj]))
(;W[rf]N[(b)];B[rd];W[rg];B[pb];W[ob];B[qb]LB[oc:a][nc:b][nd:c][of:d]C[White 'a' is solid. White 'b' and 'c' are also possible. White 'd', threatening to capture the two Black stones, is an overplay.]
(;W[oc]LB[of:a][og:b]C[Black runs with 'a' or 'b'.]N[(a)])
(;W[nc]LB[of:a][og:b]C[Black runs with 'a' or 'b'.]N[(a)])
(;W[nd]LB[of:a][og:b]C[Black runs with 'a' or 'b'.]N[(a)])
(;W[of]C[White 16 is unreasonable.]N[mistake (d)];B[nb]LB[oc:a][oa:b]C[White continues with 'a'. White 'b' only compounds the mistake.]
(;W[oc]N[(a)];B[oa])
(;W[oa]N[mistake (b)]C[White 18 is a mistake.];B[oc]LB[nc:a][od:b]C[Neither White 'a' nor 'b' work.]
(;W[nc]N[(a)];B[od];W[oe];B[nd])
(;W[od]N[(b)];B[nc])))))
(;W[of]C[White 8 may be a reasonable strategy if White has support at top, but otherwise the outcome favors Black.]N[(b)];B[og];W[ng];B[oh];W[nf];B[qe]))
(;B[qg]N[(c)])
(;B[qb]N[(d)];W[pf];B[qg]))
(;W[qe]N[(b)];B[re]LB[pc:a][rf:b][rd:c]C[White continues with 'a'. White 'b' and 'c' are mistakes.]
(;W[pc]N[(a)]LB[qb:a][rg:b][qg:c]C[Black continues with 'a' or 'b'. Black 'c' is not recommended.]
(;B[qb]N[(a)];W[og]LB[qg:a][qh:b]C[White later aims at 'a'. Black may play 'a' or 'b' to forestall this, or play elsewhere.];B[qg];W[ld])
(;B[rg]N[(b)];W[pf];B[pg];W[og];B[ph];W[jd])
(;B[qg]C[Black 9 leaves undesirable aji.]N[not good (c)];W[rf];B[rd];W[kc]))
(;W[rf]C[White 8 is a mistake.]N[mistake (b)];B[rg];W[rd];B[sf];W[rc];B[rb];W[qb];B[pc]LB[sb:a][pb:b]C[White continues with 'a'. White 'b' is a mistake, as it puts unnecessary pressure on the three White outside stones.]
(;W[sb]N[(a)];B[pb];W[ra];B[sd])
(;W[pb]C[White 16 is a mistake, as crawling along the second line usually is.]N[mistake (b)];B[oc];W[sb];B[sd];W[ra];B[nd]))
(;W[rd]C[White 8 is a mistake.]N[mistake (c)];B[rf]LB[pc:a][rc:b]C[White continues with 'a'. White 'b' is unreasonable.]
(;W[pc]N[(a)];B[rc])
(;W[rc]C[White 10 is a mistake.]N[(b)];B[pb];W[pc];B[qb];W[ob];B[rb])))
(;W[og]C[White 6 is too loose, as White is left open at the top.]N[not good (c)];B[qg];W[pc];B[nd]C[Black 9 spoils White's attempt at thickness.])
(;W[]C[White plays elsewhere.]N[tenuki (d)];B[pf];W[md];B[pc]))
(;B[qe]N[nobi (crawl) (d)]LB[pc:a][pf:b][pg:c]C[White continues with 'a' or 'b'.

White 'c' is not recommended.]
(;W[pc]LB[pb:a][pf:b]C[Black continues with 'a' or 'b'.]N[(a)]
(;B[pb]N[low (a)];W[ob];B[qb];W[pf])
(;B[pf]N[high (b)];W[qb];B[rb];W[pb];B[qg]LB[ld:a][kd:b]C[Next, White extends to 'a' or 'b'.]))
(;W[pf]N[(b)];B[pc]LB[nd:a][oc:b]C[White continues with 'a' or 'b'.]
(;W[nd];B[oc];W[mf])
(;W[oc]
(;B[qg]N[(a)];W[nd])
(;B[ob]C[Black 9 is not recommended.]N[not good (b)];W[nc];B[nb];W[lc];B[qg];W[oh];B[qh]MA[qf]C[Black 15 avoids weakness at the marked intrusion point.])))
(;W[pg]C[White 6 is not recommended.]N[not good (c)];B[pf];W[of];B[qf];W[og]LB[nd:a][oe:b]C[Black continues with 'a'. Black 'b' is not recommended.]
(;B[nd]N[(a)];W[ne];B[pc];W[md];B[me])
(;B[oe]N[(b)];W[ne];B[od];W[nd];B[oc];W[nc];B[ob];W[qg])))
(;B[oc]N[not good (e)]LB[pc:a][qe:b]C[Black 5 is not recommended.

White continues with 'a', possibly 'b'.]
(;W[pc];B[pb]LB[qe:a][qb:b]C[White continues with 'a' or 'b'.]
(;W[qe]N[(a)];B[nb];W[qi])
(;W[qb]N[(b)]LB[ob:a][rb:b]C[Black continues with 'a', or, if the ladder for White to capture Black 5 is unfavorable, possibly 'b'.]
(;B[ob]N[(a)];W[rb];B[qe];W[qf];B[rf];W[qg];B[rg];W[rc];B[sd];W[qh];B[rh];W[nd];B[mc]LB[qi:a][ri:b]C[White continues with 'a'. White 'b' is an overplay.]

(;W[qi];B[ri];W[qj])
(;W[ri]C[White 22 is an overplay that if played properly by Black, leads White to doom.]N[mistake (b)];B[qi];W[rj];B[pf];W[of];B[pg];W[ph];B[og];W[ng];B[oh];W[pi];B[od]
;W[oe];B[nf];W[ne];B[mf];W[me];B[le];W[lf];B[mg];W[ld];B[ke];W[md];B[kd];W[lc]
;B[pj];W[oi];B[nh];W[qj];B[kc];W[lb];B[mb];W[kb];B[jb]))
(;B[rb]N[White ladder (b)];W[ob];B[qa];W[nc])))
(;W[qe]MA[pc]C[Forcing first at the marked location is generally recommended, but White 6 as shown is also playable.];B[pc];W[ne];B[md];W[pi]))
(;B[nc]N[not good (f)]LB[pc:a][ob:b][qe:c]C[Black 5 is not recommended.

White continues with 'a' to 'c'.]
(;W[pc];B[pb]LB[ob:a][qe:b]C[White continues with 'a' or 'b', depending upon the side of interest.]
(;W[ob];B[qb];W[oc];B[qf];W[nd])
(;W[qe];B[ob];W[qi]))
(;W[ob]N[(b)]LB[qb:a][qe:b][pc:c]C[Black continues with 'a' or 'b'. Black 'c' is not recommended.]
(;B[qb]N[(a)];W[oc];B[qf];W[nd])
(;B[qe]N[(b)];W[pf];B[qg];W[qb];B[qf];W[pc];B[pg])
(;B[pc]C[Black 7 is the obvious blunt move, but is not recommended. Black secures good outside influence, but at considerable sacrifice in the corner.]N[not good (c)];W[oc];B[od];W[nb];B[mc];W[mb];B[oe];W[qe];B[lc];W[rd];B[rc];W[re]
;B[of];W[pb];B[qg]))
(;W[qe]N[(c)]MA[pc]C[Pushing first at the marked location before playing White 6 is recommended.];B[pc];W[qi]))
(;B[]N[Black tenuki (g)]LB[pc:a][qe:b]C[Black plays elsewhere.

White continues with 'a' or 'b'.]
(;W[pc]LB[rf:a][qe:b]C[Black continues with 'a' or 'b'.]
(;B[rf]N[(a)])
(;B[qe]N[(b)];W[qf];B[rf];W[qb];B[qg];W[pf];B[rd]))
(;W[qe];B[ob])))
(;W[pf]LB[od:a][pe:b][qe:c][nc:d][ob:e][dp:f]N[ikken-tobi (1-space jump) (b)]C[Black joseki continues with 'a' or 'b'. Other continuations show (at best) a special strategy.

'f' shows Black playing elsewhere.]
(;B[od]N[tobi-tsuke (jump-attach) (a)]LB[oe:a][nf:b]C[White continues with 'a', possibly 'b'.]
(;W[oe]LB[pc:a][oc:b]C[Black continues with 'a', or 'b' to take sente.]N[(a)]
(;B[pc]N[margari (a)];W[nd];B[pe]LB[nf:a][qe:b][oc:c]C[White continues with 'a'. White 'b' or 'c' are overplays that start a fight where White is split disadvantageously.]
(;W[nf]N[(a)]LB[qf:a][nc:b]C[Black continues with 'a' or 'b'.]
(;B[qf]N[(a)];W[pg];B[qg];W[ph];B[nc];W[md];B[mc])
(;B[nc]N[(b)];W[md];B[mc];W[kd]))
(;W[qe]N[mistake (overplay) (b)];B[ne]LB[pd:a][of:b]C[White continues with 'a' or 'b'.]
(;W[pd]N[(a)];B[oc];W[md]LB[nf:a][re:b]C[Black continues with 'a' or 'b'.]
(;B[nf]N[(a)];W[of];B[le];W[kc]LB[nh:a][nb:b]C[Black continues with 'a' or 'b'.]
(;B[nh]N[(a)])
(;B[nb]N[(b)];W[ld];B[nh];W[ph];B[ke]))
(;B[re]N[(a)];W[of];B[me];W[ld];B[le]LB[kd:a][ke:b][se:c]C[White continues with 'a'. White 'b' is a mistake.]
(;W[kd]N[(a)];B[qg])
(;W[ke]C[White 20 is too aggressive.]N[mistake (b)];B[mg]C[Black 21 weakens the White stones to the right.])))
(;W[of]N[(b)];B[md];W[nc];B[me];W[lb]))
(;W[oc]N[mistake (overplay) (c)];B[of];W[pd];B[qe];W[pg];B[nf];W[ne];B[oh];W[qi];B[lf]))
(;B[oc]C[Black 7 is intended to take sente.]N[narabi (extend) (Black sente) (b)];W[me]))
(;W[nf]N[(b)]LB[oe:a][pe:b]C[Black continues with 'a' or 'b'.]
(;B[oe]N[(a)];W[of];B[md])
(;B[pe]N[(b)];W[qf];B[me];W[pk])))
(;B[pe]N[uchi-tsuke (invasion-attach) (b)];W[oe];B[qe]LB[of:a][ng:b]C[White continues with 'a', or possibly the looser 'b'.]
(;W[of]LB[nc:a][qg:b][oc:c]C[Black continues with 'a' or 'b', depending upon the side of interest. 

Black 'c' is a mistake.]N[(a)]
(;B[nc]N[top (a)];W[qf])
(;B[qg]N[right side (b)]C[Black 9 emphasizes the right side.];W[nc])
(;B[oc]C[Black 9 is a mistake, as White can seal Black in.]N[mistake (c)];W[nc]))
(;W[ng]N[(b)]LB[qg:a][of:b]C[Black continues with 'a' or 'b'.

Black 'a' leaves a fluid situation until later.
Black 'b' creates solid shapes, and is the more likely variation of determined amateurs.]
(;B[qg]N[(a)];W[nc])
(;B[of]N[(b)];W[nf];B[og];W[oh];B[pg];W[ph];B[qg];W[nh]LB[qh:a][ne:b]C[Black continues with 'a' or 'b'.]
(;B[qh]N[(a)])
(;B[ne]N[(b)];W[me];B[od];W[md]))))
(;B[qe]N[(c)]
(;W[pe]LB[qg:a][oc:b]N[(a)]C[Black continues locally with 'a' or 'b', or plays elsewhere.])
(;W[qf]N[(b)];B[pe];W[of];B[nd]))
(;B[nc]N[(e)]LB[pc:a][qe:b]C[White resists with 'a', or goes with the flow with 'b'. ]
(;W[pc]N[(a)];B[pe];W[oe];B[qe];W[od];B[of];W[nf];B[og];W[me];B[kc]C[Black tries to have his cake and eat it too.])
(;W[qe]N[(b)];B[pc];W[od]))
(;B[ob]C[Given just the local situation, there is no reason for Black to play so low.]N[not good (e)])
(;B[]N[Black tenuki (f)]C[Black plays elsewhere.

White continues with 'a' or 'b'.]LB[qe:a][pc:b]
(;W[qe]N[(a)];B[pc];W[od];B[oc];W[nd];B[mc])
(;W[pc]N[(b)];B[pe]LB[qe:a][oe:b]
(;W[qe];B[oe]LB[qb:a][re:b]C[White continues with 'a'. White 'b' is awkward.]
(;W[qb]N[(a)];B[rb];W[pb];B[re];W[qf];B[rf];W[qh];B[rg];W[ng];B[me];W[mc];B[ke])
(;W[re]C[White 9 leads to awkward shape for the White stones at top.]N[not good (b)];B[pb];W[oc];B[ob];W[nc];B[rb]))
(;W[oe]C[White 7 is not recommended.]N[not good (c)];B[qe];W[of]LB[qf:a][od:b]C[Black continues with 'a' or 'b'.

Black 'a' is a consistent territory orientation.  Black 'b' aims to create a center position.]
(;B[qf]N[(a)];W[ph];B[od];W[nd]C[White sacrifices for thickeness, keeping to original strategy.];B[oc];W[pb];B[nb];W[mb];B[ob];W[na];B[qb];W[lc]C[Black has a tidy profit, while White's thickness is less than perfect.]
)
(;B[od]N[(b)];W[oc];B[nd];W[nc];B[md];W[mc];B[ld];W[qf];B[pb];W[ob];B[qb];W[kb])))))
(;W[pc]C[White 4 is a mistake, even with support at top as shown.]AW[jc]N[mistake: nobi (extension) (c)];B[pe]C[Black responds to White's mistake at 4.];W[oe];B[of]LB[pf:a][qe:b]C[White continues with 'a'. White 'b' is a mistake.]
(;W[pf]N[(a)];B[qe];W[ne];B[nf];W[me];B[pg]LB[pb:a]C[The black hane at 'a' plus connection remains sente.])
(;W[qe]N[mistake (b)];B[pf];W[re];B[pb];W[ob];B[qb];W[od];B[rd];W[rg];B[qf];W[rf];B[qh];W[rh]
;B[qi];W[ri];B[qj];W[rj];B[rk];W[qg];B[pg];W[qk];B[rl];W[ph];B[oh];W[pi];B[pj]
;W[oi];B[oj];W[ni];B[nf];W[se];B[sj];W[sb];B[sd];W[pa];B[ra];W[rb];B[si]LB[sh:a][sa:b]C[Neither 'a' nor 'b' work.]

(;W[sh]N[(a)];B[sk])
(;W[sa]N[(b)];B[sh]))))
(;B[oc]N[(b)];W[pc];B[pb]LB[qd:a][qb:b][ob:c]C[White continues with 'a' to 'c'.]
(;W[qd]N[(a)];B[rb];W[rc];B[qb];W[pf])
(;W[qb]N[(b)];B[rb];W[ob];B[qa];W[nc]LB[pe:a][qe:b]C[Black continues with 'a'. Black 'b' is not recommended.]
(;B[pe]LB[od:a][qd:b]C[Black 11 is a tesuji.

White continues with 'a'. White resistance with 'b' is futile.]N[(a)]
(;W[od]N[(a)];B[qd])
(;W[qd]C[White tries to resist Black's tesuji, a mistake.]N[mistake (b)];B[od]C[White is at a loss as to a good next move.]))
(;B[qe]C[Black 11 is not recommended.]N[not good (b)];W[od]))
(;W[ob]N[(c)];B[nb];W[qb];B[oa];W[rc];B[od];W[qd];B[of]))
(;B[ob]N[(c)];W[qd];B[rc]LB[qh:a][nd:b][md:c]C[White continues with 'a' or 'b'.]
(;W[qh]N[(a)];B[nd])
(;W[nd]N[(b)]LB[mc:a][oc:b]C[Black continues with 'a' or 'b'.]
(;B[mc]N[(a)];W[le])
(;B[oc];W[od];B[rd];W[qf]))
(;W[md]C[White 6 is an overplay.]N[not good (c)];B[nd];W[ne];B[nc];W[me];B[oe];W[of];B[pe];W[pf];B[qe];W[qf];B[re]C[White has given up too much for thickness.]
)))
(;W[oc]N[ikken kakari (1-space attack) (b)]LB[pe:a][qf:b][pf:c][od:d][dp:e]C[Black continues with 'a' to 'd'. Black 'e' shows Black playing elsewhere.

e5,d4,c3,b2,a1]
(;B[pe]AE[jd]LB[md:a][lc:b]C[White continues with 'a' or 'b'.]N[(a)]
(;W[md]N[(a)];B[qi];W[ic])
(;W[lc]N[(b)];B[qi];W[oe]LB[of:a][pf:b]C[Black continues with 'a' or 'b'.]
(;B[of]N[(a)];W[pd];B[qd];W[pf];B[qe];W[ne];B[pg];W[nf];B[og])
(;B[pf]N[(b)];W[qb];B[rb];W[pb];B[pd];W[od])))
(;B[qf]N[(b)]LB[lc:a][oe:b][of:c]C[Black 3 is mild.

White continues with 'a' to 'c'. White 'd' show White playing elsewhere.

d4, c3, b2, a1]
(;W[lc]N[(a)];B[]C[Black plays elsewhere.]N[Black tenuki];W[qb]C[White 6 looks like an endgame move, but is more threatening than that.];B[rb]LB[qd:a][pb:b]C[White continues with the fiesty 'a', or 'b'.]
(;W[qd]C[Black 8 is a clamping tesuji, and an invitation to a fight.]N[(a)];B[pc];W[pd];B[od])
(;W[pb]N[(b)];B[]C[Black plays elsewhere.]N[Black tenuki];W[qh];B[of];W[rd];B[rc];W[rf];B[qe];W[re];B[qd];W[oh]))
(;W[oe]N[(b)]LB[pg:a][pd:b][kd:c][of:d][dp:e]C[Black continues with 'a' to 'c'. Black 'd' shows Black playing elsewhere.

e5, d4, c3, b2, a1]
(;B[pg]N[(a)];W[qb];B[rb];W[qd];B[rd];W[pc];B[rc];W[kd])
(;B[pd]N[(b)];W[od];B[pg];W[kc])
(;B[kd]N[(c)]LB[qb:a][pg:b]C[White continues with 'a'. White 'b' is not recommended, as it can start a slippery slope to disaster.]
(;W[qb]N[(a)];B[rb];W[qd];B[rd];W[pc];B[rc];W[qe];B[re];W[pf];B[qg])
(;W[pg]C[White 6 is an overplay.]N[not good (b)];B[pf];W[of];B[og];W[pi];B[ng];W[qg];B[pd];W[od];B[me];W[rd];B[qd]
;W[rc];B[rb];W[sb];B[ra];W[rf];B[re];W[se];B[qe];W[qb];B[pb];W[rg];B[ob];W[md]
;B[nc];W[nd];B[ld];W[mc];B[nb]))
(;B[of]N[(d)];W[nf];B[og];W[qe];B[re];W[pe];B[rg];W[kd])
(;B[]C[Black plays elsewhere.]N[Black tenuki (e)];W[pg];B[qg];W[ph];B[qh];W[pi]))
(;W[of]N[(c)];B[ph];W[jd])
(;W[]C[White plays elsewhere.]N[White tenuki (d)];B[ld];W[oe];B[pd];W[od];B[pg];W[mg]LB[id:a][nf:b]C[White 12 is a tesuji. Black immediately playing at 'b' weakens Black 7, so is not advised.

Black 'a' is one possible continuation.]
(;B[id]C[Black 11 is one possible extension.]N[(a)])
(;B[nf]C[Black 11 is not recommended.]N[not good (b)];W[qe];B[pe];W[of];B[og];W[pf]LB[qg:a][re:b]C[Black may try 'a' or 'b'.]
(;B[qg]N[(a)];W[qb];B[rb];W[pb];B[rd];W[me];B[ng];W[id])
(;B[re]N[(b)];W[qg];B[rf];W[ng];B[qh];W[me]))))
(;B[pf]LB[kd:a][lc:b][qd:c]C[White continues with 'a'. White 'b' is not recommended.]
(;W[kd]N[(a)]C[White plays large like Black. This is appropriate.])
(;W[lc]N[not good (b)]LB[pc:a][dp:b]C[White 4 is too short an extension.

White continues locally with 'a', or plays elsewhere ('b').]
(;B[pc]N[(a)];W[od];B[ph])
(;B[]C[Black plays elsewhere.]N[Black tenuki (b)];W[qh]LB[qf:a][dp:b]C[Black continues with 'a'. 'b' shows Black playing elsewhere.]
(;B[qf]N[(a)])
(;B[]C[Black plays elsewhere.]N[Black tenuki (b)];W[qe]LB[pe:a][pd:b]C[Black continues with 'a' or 'b'.]
(;B[pe]LB[qd:a][pd:b]C[White continues with 'a' or 'b'.]N[(a)]
(;W[qd]N[(a)];B[pd];W[pc];B[qf];W[rc])
(;W[pd]N[(b)];B[qd];W[re];B[ob];W[nb];B[pb];W[nd];B[rb]))
(;B[pd]N[(b)]LB[qf:a][pe:b]C[White continues with 'a' for territory on both sides, or 'b' to push into the center at the sacrifice of the group at top.]
(;W[qf]N[(a)];B[pg];W[ph];B[od];W[nc];B[oh];W[oi];B[nh];W[qg];B[nf])
(;W[pe]N[(b)];B[od];W[oe];B[nc];W[ne];B[]C[Black plays elsewhere.];W[nb];B[nd];W[ob];B[ld];W[kc];B[me];W[mf]
;B[lf];W[mg])))))
(;W[qd]N[not good (c)]C[White 4 is not recommended, as it gives Black good shape.];B[pd];W[pc];B[qe];W[qb];B[rd];W[rb];B[md];W[mb]))
(;B[od]N[(d)];W[nd]LB[pd:a][oe:b]C[Black continues with 'a' or 'b'.]
(;B[pd]LB[ne:a][mc:b][nc:c][dp:d]C[White continues with 'a' to 'c'. White 'd' shows tenuki.]N[(a)]
(;W[ne]N[(a)];B[nc];W[mc];B[nb]LB[mb:a][ld:b]C[White continues with 'a' to emphasize the top, 'b' to target the right side.]
(;W[mb]N[(a)];B[ob];W[le])
(;W[ld]N[(b)];B[ob]C[Black 11 is honte (the proper move).];W[pf]))
(;W[mc]N[(b)]LB[ne:a][pg:b][dp:c]C[Black continues with 'a' or 'b'. 'c' shows Black playing elsewhere.]
(;B[ne]N[(a)];W[me]LB[nf:a][mf:b]C[Black continues with 'a'. Black 'b' is an overplay.]
(;B[nf]N[(a)])
(;B[mf]C[Black 9 is an overplay.]N[not good (b)];W[nf];B[oe]LB[le:a][ng:b]C[White continues with 'a'. White 'b' is a mistake.]
(;W[le]N[(a)];B[ng];W[lf];B[mg]C[White 10 has aji, and White is more solid.])
(;W[ng]C[White 12 is an overplay.]N[mistake (b)];B[le];W[md];B[lf];W[kd];B[pg];W[ni]C[Black's three stones in the center can escape with relative ease.

Black can press the White center stones for profit.])))
(;B[pg]N[(b)];W[jd])
(;B[]LB[nf:a][pf:b]C[White continues with 'a'. White 'b' is an unreasonable overplay.]N[Black tenuki (c)]
(;W[nf]N[(a)];B[qf])
(;W[pf]C[White 8 is unreasonable.]N[mistake (b)];B[of];W[oe];B[pe];W[ne];B[pg];W[qf];B[qg];W[qe];B[rf];W[re];B[rg]
;W[rc];B[rd])))
(;W[nc]N[(c)]LB[ne:a][jd:b][of:c]C[White 6 is a bit slow, but playable.

Black continues with 'a' to 'c'.]
(;B[ne]N[(a)];W[me]LB[nf:a][mf:b]C[Black continues with 'a' or 'b'.]
(;B[nf]N[(a)];W[mf];B[ng])
(;B[mf]N[(b)];W[le];B[nf];W[id]))
(;B[jd]N[(b)]LB[nf:a][dp:b]C[White continues with 'a', or plays elsewhere ('b').]
(;W[nf]N[(a)];B[pg])
(;W[]C[White plays elsewhere.]N[White tenuki (b)];B[ne];W[me];B[mf];W[nf];B[oe];W[le];B[mg]))
(;B[of]N[(c)];W[ne];B[jd]))
(;W[]N[White tenuki (d)]LB[nc:a][ne:b]C[Black continues with 'a', or, with support at right, 'b'.]
(;B[nc]N[(a)];W[mc];B[nb];W[md];B[ob])
(;B[ne]AB[pj]MA[pj]C[Black plays 7 as shown with support at right.]N[(b)];W[md];B[me];W[ld];B[kf])))
(;B[oe]N[(b)]LB[pc:a][mc:b][nc:c][ne:d]C[White continues with 'a'. White 'b' and 'c' are not recommended. White 'd' gives away too much territory.]
(;W[pc]N[(a)];B[qd])
(;W[mc]C[White 6 is slow.]N[not good (b)];B[pc];W[ob]LB[pi:a][ne:b][ld:c]C[Black continues with 'a' to 'c'.]
(;B[pi]N[(a)])
(;B[ne]N[(b)];W[me];B[mf];W[le];B[lf];W[ke];B[pj])
(;B[ld]N[(c)]LB[ne:a][lc:b]C[White continues with 'a' or 'b'.]
(;W[ne]N[(a)];B[of];W[nf];B[og];W[lf];B[id];W[kb])
(;W[lc]N[(b)];B[jd];W[le];B[ph])))
(;W[nc]N[not good (c)]LB[kd:a][dp:b]C[White 6 is slow.

Black continues with 'a'.  Variation 'b' shows Black playing elsewhere.]
(;B[kd]LB[ne:a][pd:b][qe:c]C[White continues with 'a'. White 'b' is unreasonable. White 'c' is not good either.]N[(a)]
(;W[ne]N[(a)];B[of];W[mg];B[oh])
(;W[pd]C[White 8 is unreasonable.]N[mistake (b)];B[pc];W[pe];B[pf];W[of];B[ne];W[qf];B[pg];W[rd];B[rc];W[re];B[ob]
;W[nb];B[pb];W[me];B[nf])
(;W[qe]C[White 8 is not recommended.]N[not good (c)];B[qd];W[re];B[pc];W[ne];B[of];W[qh];B[oh];W[lf];B[qi];W[ri];B[qg]
;W[rg];B[ph];W[rh];B[qj]))
(;B[]C[Black plays elsewhere.]N[Black tenuki (b)];W[qe]LB[qd:a][pd:b][qf:c][pg:d]C[Black continues with 'a'. Black 'b' is not recommended. Black 'c' is a mistake, as is Black 'd'.]
(;B[qd]N[(a)];W[re];B[pc];W[qh];B[ne];W[me];B[mf];W[le])
(;B[pd]C[Black 9 is not recommended.]N[not good (b)];W[qh])
(;B[qf]N[mistake (c)]LB[pf:a][rf:b]C[Black 9 is a mistake.

White continues with 'a' or 'b'.]
(;W[pf]N[(a)];B[pe];W[qd];B[pd]C[Black's shape simply could not be worse.];W[rf];B[qg];W[pc];B[rc];W[re];B[rg];W[nf]C[White 20 starts building great thickness the sacrifice of the four White stones];B[of]
;W[og];B[pg];W[ne];B[pf];W[oh])
(;W[rf]N[(a)];B[qg];W[pc];B[qd];W[pd];B[re];W[pe];B[rd];W[og]))
(;B[pg]N[(d)];W[pc];B[qd];W[pd];B[pe];W[re];B[rb];W[rd];B[rc];W[qh];B[pb];W[ob];B[pa]
;W[ne])))
(;W[ne]N[not good (d)]LB[nc:a][nf:b]C[White 6 gives away too much territory.

Black 'a' takes advantage of White's mistake, whereas 'b' lets White move seem playable.]
(;B[nc]LB[mc:a][pc:b]C[White continues with 'a' or 'b', neither favorable.]N[(a)]
(;W[mc]N[(a)];B[nb];W[mb];B[ob];W[nf];B[pg])
(;W[pc]N[(b)];B[pd];W[qb];B[qd];W[nb];B[mc];W[mb];B[lc];W[rb];B[nf];W[me];B[jd];W[mf]
;B[ng]))
(;B[nf]N[not good (b)]LB[pc:a][nc:b]C[Black 7 is not recommended.

White continues with 'a' or 'b'.]
(;W[pc]N[(a)];B[qd])
(;W[nc]N[(b)];B[of];W[jc];B[pc])))))
(;B[]N[Black tenuki (e)]C[Black plays elsewhere. This is not recommended. Black will be forced low to live.];W[pe];B[pd];W[od];B[qe];W[qf];B[rf]LB[pf:a][re:b]C[White continues with 'a'. White 'b' is a mistake.]
(;W[pf]N[(a)];B[rd];W[pc];B[qd];W[jd])
(;W[re]C[White 10 is an overplay.]N[mistake (b)];B[qd];W[pf];B[rg])))
(;W[nd]LB[pf:a][pe:b][jd:c][qf:d]C[Black continues with 'a' or 'b'. Black 'a' works well when Black is in the lower right (so an extension in the middle works both ways). The more conservative 'b' is makes a slightly tighter shape (better for a fight).

Black 'c' is possible if Black has an extension on the right side. 

Black 'd' may be best if White has a stone on the right side that blocks extension.]N[oogeima (large knight's move) (c)]
(;B[pf]N[oogeima (large knight's move) (a)];W[jd];B[qj]LB[nf:a][oc:b][pc:c]C[The follow-up points are 'a' for profit and 'b' for influence.
White 'c' is not recommended.]
(;W[nf]N[(a)])
(;W[oc]LB[pc:a][dp:b]C[Black continues with 'a', or risks the corner by playing elsewhere ('b').]N[(b)]
(;B[pc]N[(a)];W[nf])
(;B[]C[Black plays elsewhere.]N[Black tenuki];W[qb]LB[qd:a][rb:b]C[Black continues with 'a'. Black 'b' is a mistake.]
(;B[qd]N[(a)];W[rb])
(;B[rb]C[Black 9 is a mistake.]N[mistake (b)];W[qd]C[Black is in trouble.])))
(;W[pc]C[White 6 settles the corner in sente, but solidifies Black.]N[(c)];B[pd];W[oc];B[qb];W[nf];B[ph]C[Black is better off.]))
(;B[pe]LB[jc:a][qg:b]C[White continues with 'a'. White 'b' is possible with support at right.]N[keima (knight's move) (b)]
(;W[jc]N[White top (a)];B[qi];W[pc]LB[pd:a][oc:b]C[Black continues with 'a'. Black 'b' gives White the corner in sente, a local loss.]
(;B[pd]N[(a)];W[oc];B[qb];W[nf];B[pg])
(;B[oc]LB[pd:a][od:b]C[Black 7 is not recommended.

White continues with 'a'. White 'b' is a mistake.]N[mistake (b)]
(;W[pd]N[(a)];B[od];W[qd];B[qe];W[rd];B[oe];W[ob];B[nb];W[pb];B[nc])
(;W[od]C[White 8 is a mistake.]N[mistake (b)];B[pd];W[pb];B[ob];W[qb];B[rb];W[rc];B[qd];W[ra];B[sb];W[sc];B[pa]
;W[sa];B[rb];W[sb];B[oa];W[qa];B[rd];W[nc];B[sd];W[nb];B[rb])))
(;W[qg]AW[qj]C[In this case, Black 3 was a mistake.]N[Black's mistake (b)];B[of]C[Black must play 5 to get to the center.];W[kd]LB[re:a][oc:b]C['a' and 'b' are local vital points.]))
(;B[jd]AB[qj]C[A pincer around Black 3 is possible if Black has support such as the stone shown on the right side.]N[sangen takabasami (high 3-space pincer) (c)];W[pd];B[qd];W[pf]C[White aims to settle himself playing loosely.];B[qe];W[ng];B[qg];W[hd]AW[dd]C[White 10 is a checking extension. This play makes sense if White has support in the top right corner, as shown.])
(;B[qf]AW[qj]C[Black plays 3 if White has a stone as shown that blocks Black from extending down the right side.]N[niken hiraki (2-space extension) (d)]))
(;W[od]N[keima (d)]LB[pe:a][qe:b][qf:c][pd:d][oc:e]C[White 2 is a high tight attack with a direction bias.

White continues with 'a'. Tactically, any other response is less advantageous.]
(;B[pe]N[(a)]LB[oe:a][kd:b][jd:c][ph:d][nf:e][dp:f]C[White continues with 'a' to 'd'. White 'e' indicates a special strategy of influence toward the top-left. Variation 'f' covers White playing elsewhere.]
(;W[oe]N[(a)];B[pf];W[pc];B[qb]LB[kd:a][of:b]C[White continues with 'a', or plays on a large scale with 'b'.]
(;W[kd]N[(a)])
(;W[of]N[(a)];B[pg];W[nh]))
(;W[kd]N[(b)];B[oe];W[oc];B[ne];W[md];B[pj]C[The joseki concludes.];W[qb]C[A later continuation.];B[rb];W[pb];B[rd])
(;W[jd]N[(c)]LB[pg:a][oe:b][ld:c][dp:d][pj:e]C[Black continues with 'a' 'b'. Black 'c' is not recommended.

Black 'd' shows Black playing elsewhere.]
(;B[pg]LB[oc:a][pc:b]C[White continues with 'a'. White 'b' is a mistake.]N[(a)]
(;W[oc]N[(a)])
(;W[pc]C[White 6 is a mistake, as it lets Black solidify the corner.]N[mistake (b)];B[qb];W[md]))
(;B[oe]N[(b)];W[md])
(;B[ld]N[not good (c)]LB[oe:a][nf:b]C[Black 5 is unreasonable.

White continues with 'a' or 'b'.]
(;W[oe]N[(a)]C[White 6 builds thickness for an attack on Black 5.];B[pf];W[of];B[pg];W[ke];B[mf];W[me];B[le];W[lf];B[md];W[mg];B[ne]
;W[nf])
(;W[nf]N[(b)]C[White 6 is a light way of playing.];B[lf];W[pd];B[qd];W[pf];B[oe];W[ne];B[qe];W[nh]))
(;B[]N[Black tenuki (d)]LB[qg:a][pg:b][qh:c][qi:d]C[Black plays elsewhere.

White continues with 'a' to 'dc'.]
(;W[qg]LB[oe:a][pj:b]C[Black continues with 'a' or 'b'.]N[(a)]
(;B[oe]LB[md:a][nd:b]C[White plays 'a' to preserve position at top, or 'b' to emphasize the right side.]N[(a)]
(;W[md]N[(a)];B[ph];W[qi];B[qh];W[rh];B[pg];W[qf];B[ri];W[rj];B[pi];W[qj];B[rg];W[si]
;B[rf])
(;W[nd]N[(b)]C[White 7 emphasizes the right side, as Black launches a splitting attack.];B[og];W[pi];B[ld];W[ne];B[ke];W[mf];B[nh]))
(;B[pj]N[(b)];W[og];B[oe];W[md]LB[ne:a][oc:b]C[White continues with 'a' or 'b'.]
(;B[ne]N[(a)];W[mg];B[nd];W[nc];B[mc];W[lc];B[mb];W[nb];B[lb];W[kc];B[me];W[ld];B[oc]
;W[ob];B[pb];W[pc];B[pd];W[kb];B[oc])
(;B[oc]N[(b)];W[mf])))
(;W[pg]N[(b)];B[oe];W[md]LB[og:a][nf:b]C[Black continues with 'a' or 'b'.]
(;B[og]N[(a)];W[pi];B[qg];W[qh];B[pf];W[ph];B[rg])
(;B[nf]N[(b)];W[pj];B[oc]))
(;W[qh]N[(c)];B[qf])
(;W[qi]N[(d)];B[qg]LB[oe:a][pc:b]C[White continues with 'a' or 'b'.
]
(;W[oe]N[(a)];B[pf];W[pc];B[qb])
(;W[pc]N[(b)];B[qb];W[pf]LB[qf:a][oe:b]C[Black continues with 'a' or 'b'.]
(;B[qf]N[(a)];W[oe];B[pg];W[qe];B[of];W[qd]C[But there is still aji in the corner....];B[pb];W[ob];B[rd];W[re];B[sc];W[rb]
;B[ra]LB[sb:a][pa:b]C['a' and 'b' are miai.])
(;B[oe]N[(b)];W[qf];B[nd];W[nc];B[mc];W[md];B[ne];W[lc];B[mb];W[nb];B[lb];W[kc];B[me]
;W[ld];B[ob];W[pb];B[pa];W[na];B[pd];W[kb];B[oc];W[la])))))
(;W[ph]N[(d)]LB[oe:a][qf:b]C[Black gets out with 'a' or settles shape locally with 'b'.]
(;B[oe]N[(a)]C[Black keeps White separated.];W[md];B[ne];W[me];B[mf];W[lf];B[mg];W[lg];B[mh];W[pk])
(;B[qf]N[(b)]C[Black settles his shape in sente.];W[kd]))
(;W[nf]N[(e)]C[White aims for influence at top, but gives away a large corner.];B[oe];W[ne];B[nd];W[md];B[nc];W[mc];B[nb];W[mb];B[pg])
(;W[]N[White tenuki (f)];B[kd];W[md];B[pg];W[mf];B[kf];W[mh]))
(;B[qe]N[(b)];W[pc]LB[qb:a][pd:b]C[Black continues with 'a' or 'b'.]
(;B[qb]N[(a)]LB[ld:a][of:b][pf:c]C[White continues with 'a' to 'c'.]
(;W[ld]N[(a)])
(;W[of]N[(b)]LB[pg:a][dp:b]C[Black continues with 'a', or plays elsewhere ('b').]
(;B[pg]N[(a)];W[kd])
(;B[]C[Black plays elsewhere.]N[Black tenuki (b)];W[qf];B[rf];W[pe];B[qd];W[qg];B[rg];W[qh]))
(;W[pf]C[Black continues with 'a', or the fighting move (finally) of 'b'.]
(;B[qf]N[(a)];W[pg];B[qg];W[ph])
(;B[pe]N[(b)];W[oe];B[of]LB[qf:a][ph:b][pg:c]C[White continues with 'a' or 'b'. White 'c' is not recommended.]
(;W[qf]N[(a)];B[rf];W[rg];B[re];W[ph];B[og];W[pi];B[mf];W[md];B[mi])
(;W[ph]N[(b)]LB[nf:a][pg:b]C[White 10 is a tesuji.

Black continues with 'a'. Black 'b' is a mistake.]
(;B[nf]N[(a)];W[qf];B[rf]LB[md:a][rg:b]C[White continues with 'a' or the fierce move at 'b'.]
(;W[md]N[(a)];B[rg];W[qh];B[nh];W[pk];B[jd])
(;W[rg]N[fierce (b)];B[md];W[rd]C[White 16 is the vital point.];B[qd];W[re]LB[ob:a][nc:b]C[Black may try 'a' or 'b'.]
(;B[ob]N[(a)];W[nc];B[oc];W[nd];B[mc];W[nb];B[pd];W[oa];B[pb];W[mb];B[lb];W[lc];B[ld]
;W[kc];B[kb];W[jb];B[jc];W[kd];B[ib];W[me];B[le];W[mf]C[White 40 is the vital point.])
(;B[nc]N[(b)];W[pb];B[rc];W[ra];B[qa];W[pa];B[oc];W[pd];B[sc];W[sf]C[Black loses the capturing race.])))
(;B[pg]C[Black 11 is a mistake.]N[(b)];W[og];B[qf];W[nf];B[oh];W[pf];B[qg];W[pi];B[nh];W[oj];B[lh];W[lf]
))
(;W[pg]C[White 10 is not recommended, as it is unnecessarily heavy. Variation 'a', the one-space jump, gives a more favorable result to White.]N[not good (c)];B[nf];W[md];B[oh];W[qi];B[rf];W[rg];B[mh];W[jd];B[pj];W[qj];B[pk]
))))
(;B[pd]N[(b)];W[oc];B[oe];W[ne];B[of];W[qb]))
(;B[qf]N[(c)])
(;B[pd]N[(c)]LB[oe:a][oc:b][pe:c]C[White continues with 'a' or 'b'. White 'c' is a mistake.]
(;W[oe]N[(a)]LB[oc:a][pf:b]
(;B[oc];W[nc];B[ob];W[pe];B[qe];W[qf];B[re];W[me])
(;B[pf];W[oc]LB[pe:a][kc:b];B[kc];W[pe];B[qe];W[qf];B[qg];W[rf];B[pg];W[qb];B[rb]
;W[rd];B[qd];W[rc];B[pb];W[pc];B[qa];W[re];B[qb];W[ob];B[rg];W[sb];B[sc];W[sd]
;B[sf];W[oa];B[sa];W[ra]))
(;W[oc]N[(b)];B[pe];W[kc])
(;W[pe]C[White 4 is a mistake.]N[mistake (c)];B[qe];W[pc];B[qd];W[oc];B[pf];W[oe]LB[qi:a][qh:b][ph:c][jc:d]C[Black extends with 'a' to 'c', depending upon the situation in the lower right, or thwarts White at the top with 'd'.]
(;B[qi]N[(a)])
(;B[qh]N[(b)])
(;B[ph]N[(c)])
(;B[jc]C[Black cannot afford to be any closer to the thick White stones.]N[(d)])))
(;B[oc]N[(e)]))
(;W[nc]N[nigen gakari (2-space attack) (e)]LB[kd:a][dp:b]C[Black can thwart White's strategy with a play at 'a', or ignore White 2 ('b').]
(;B[kd]N[(a)]LB[pd:a][qd:b]C[White continues with 'a' or 'b'.]
(;W[pd]LB[pc:a][re:b]N[(a)]C[Black continues with 'a' or 'b'.]
(;B[pc]LB[oc:a][qd:b]C[White continues with 'a' or 'b'. White 'b' is tough-minded.]N[(a)]
(;W[oc]N[(a)];B[re];W[pf];B[qg];W[oh])
(;W[qd]N[(b)]C[White 6 provokes a fight.];B[oc];W[od];B[nd];W[md];B[ne];W[mb];B[rd];W[re];B[rc];W[me];B[nf]
;W[pf];B[ob]))
(;B[re]N[(b)];W[pc];B[qb]))
(;W[qd]N[(b)];B[pd];W[pc];B[qe];W[rd];B[oc];W[pb];B[pe]))
(;B[]C[Black plays elsewhere.]N[Black tenuki (b)];W[qe]LB[pd:a][dp:b]C[Black continues locally with 'a', or Black can ignore White again, and still live in the corner ('b').]
(;B[pd]N[(a)];W[pe];B[nd];W[md];B[ne])
(;B[]C[Black plays elsewhere again.]N[Black tenuki (b)];W[oe];B[ob];W[nb];B[oc];W[od];B[rd];W[re];B[rb])))
(;W[pc]C[White 2 is not recommended.]N[not good (f)];B[pd]LB[oc:a][qd:b]C[White 'a' is sensible (a change of strategy from the silliness of White 2), but White 'b' is to be expected.]
(;W[oc]N[(a)];B[qd];W[od];B[qh];W[kc]C[Of course, either player could have played on the fourth line instead.])
(;W[qd]C[Chances are that White had complications in mind with White 2, hence the cross-cut.]N[(b)];B[rc]C[Black could have as well played R18 rather than S17 (as shown).

Regardless of continuation, Black captures either White 2 or White 4.];W[qe];B[oc])))
(;B[qd]LB[oc:a][nc:b][nd:c][od:d][dp:e][qj:f][pg:g]GN[3-4 Joseki]N[komoku (3-4 point)]C[The komoku (3-4) point is the traditional corner enclosure move. White approaches with 'a' to 'd'. 

'e' covers enclosure (shimari) joseki.

White 'f' and 'g' are special strategies.

g7, f6, e5, d4, c3, b2, a1]
(;W[oc]LB[pe:a][pf:b][qg:c][mc:d][lc:e][kc:f][md:g][ld:h][kd:i][od:j][nd:k][pc:l][oe:m]N[keima kakari (small knight's attack) (a)]C[The small knight move is the basic approach move to the 3-4 point stone. It has been continually used for over four centuries. There are limitless variations, with new moves constantly being discovered. White 2 opens the door to a treaure store of joseki.

Black responds with 'a' to 'k'. Black 'l' indicates a special strategy based upon favorable local position.

'k' is somewhat a trick play. Black must have the ladder.

'm' is a trick play.

m13, l12, k11, j10, i9, h8, g7, f6, e5, d4, c3, b2, a1

outcomes:
a1, b2, c3, j10, k12 - Black right
d4, e5, g7, h8, i9  - White choice
f6 - variable
k11 - Black thick outside, White big corner
m13 - Black right high, White top territory
]

(;B[pe]LB[md:a][lc:b][kc:c][jc:d][dp:e][nd:f]C[Black 3, the famous Shusaku diagonal move, is a steady way of responding to White's kakari. Black can now aim to press against the lone White stone with 'a'.

White's possible local responses are 'a' through 'd'. 
White 'a': White must be prepared to fight.
White 'b': secure.
White 'c': invites invasion.
White 'd': played as an extension from the top left; invites invasion.

Variation 5 shows Black continuations when White plays elsewhere.

White 'f' is an Edo period (1600-1867) joseki that has since been abandoned as unfavorable to White.

f6, e5, d4, c3, b2, a1]N[kosumi (diagnoal move) (a)]
(;W[md]LB[qj:a][kc:b]C[White must be prepared for a fight. Black finishes the joseki with 'a', or starts a fight with 'b'.]N[keima (knight's move) (a)]
(;B[qj]N[simple (a)];W[ic];B[pc]C[Continuation. The difference between Black and White playing here (White at R18) is nearly 20 points. This is a large endgame move.];W[od];B[pb])
(;B[kc]LB[hd:a][qb:b]C[Black must consider the upper left corner when playing this way. Without support this is an overplay for Black.

White attacks the lone Black stone with 'a' (joseki), or slides in the corner with 'b', which is not joseki, as 'b' has problems.]N[fighting (b)]
(;W[hd]N[(a)];B[ke];W[mf])
(;W[qb]C[The slide of White 6 is not recommended.]N[not good: suberi (slide) (b)];B[qi]LB[mb:a][lc:b][kd:c]C[White doesn't have a good follow-up. Black 'a' is intolerable, but White 'b', Black 'c' is not favorable to White.])))
(;W[lc]LB[pc:a][qj:b][dp:c]C[Black continues with 'a' or possibly 'b'. Playing elsewhere ('c'; tenuki) is not joseki.

c3, b2, a1]N[niken hiraki (2-space extension) (b)]
(;B[pc]N[(a)];W[od];B[pg])
(;B[qj]LB[ne:a][qb:b]C[White continues with 'a'. White 'b' gives Black a chance for moyo.]N[(b)]
(;W[ne]N[(a)];B[pc];W[ob];B[pg])
(;W[qb]N[(b)];B[nd];W[nc];B[le]))
(;B[]C[Black plays elsewhere (not joseki).]N[Black tenuki];W[qb]C[White makes ideal shape if Black plays elsewhere.];B[qi]))
(;W[kc]LB[pc:a][od:b]C[The three-space extension is a light move and is most often used in actual games. For Black to attack at 'a' and provoke 'b' would give White an ideal position. Black should invade.]N[sangen hiraki (3-space extension) (c)];B[mc]LB[oe:a][mb:b]C[White continues with 'a' or 'b'. White 'a' leads to capture of Black 5 at top. White 'b' leads to thickness at the loss of territory.]
(;W[oe]N[(a)];B[of];W[ne];B[pg];W[ld];B[pc];W[ob])
(;W[mb]LB[lb:a][nb:b]C[Black continues with 'a'. Black 'b' is a mistake.]N[(b)]
(;B[lb]N[(a)];W[lc];B[nb];W[md];B[nc];W[nd]LB[od:a][kb:b]C[Black continues with 'a'. Black 'b' is a mistake.]
(;B[od]N[(a)];W[ob];B[ma];W[oa];B[na];W[kb];B[pc];W[oe];B[pd];W[of])
(;B[kb]C[Black 13 is a mistake.]N[mistake (b)];W[ob];B[ma];W[oe]LB[jc:a][of:b]C[No matter what Black does, White can play at 'a' or 'b', either of which are severe.]))
(;B[nb]C[Black 7 is a mistake in direction.]N[mistake (b)];W[nc];B[lb];W[md];B[lc];W[ld];B[ob];W[kb];B[ma];W[ke];B[pc]LB[nd:a]C[White has made good shape in sente. If Black cuts at 'a', White sacrifices the two White stones.]
)))
(;W[jc]LB[nd:a][lc:b]C[The four-space extension of White 4 is often played in relation to stones in the upper left corner. This extension, however, is quite wide and if Black invades, it is impossible to determine how the sequence will develop, so White must be ready for anything.

Black continues with 'a' or 'b'.]N[4-space extension (d)]
(;B[nd]N[(a)];W[nc]LB[ld:a][md:b]C[Joseki continues with Black 'a', not 'b'.]
(;B[ld]LB[mc:a][od:b]C[White continues with 'a', not 'b'.]N[(a)]
(;W[mc]N[(a)];B[ne];W[lc];B[qj])
(;W[od]C[White 8 is vulgar.]N[zoku-suji (bad style) (b)];B[oe];W[md];B[me];W[ne];B[nf]LB[lc:a][le:b]C[White must play at 'a', not 'b'.]
(;W[lc]N[(a)];B[nd];W[mc])
(;W[le]C[White 14 is a mistake.]N[mistake (b)];B[nd];W[mc];B[kd]C[Black has thickness and White must still defend the left side.])))
(;B[md]C[Black 7 is poor.]N[mistake (b)];W[mc];B[ld];W[lc]LB[kd:a][qj:b]C['a' and 'b' are miai, to Black's disadvantage.]))
(;B[lc]N[(b)];W[oe];B[of];W[ne]LB[pc:a][le:b]C[Black continues with 'a'. Black 'b' is unreasonable.]
(;B[pc]N[(a)]LB[pb:a][nb:b]C[White continues with 'a'. Black 'b' is not as favorable.]
(;W[pb]N[(b)];B[qb];W[le])
(;W[nb]N[(b)]))
(;B[le]C[Black 9 is unreasonable.]N[mistake (b)];W[pf];B[pg];W[qf];B[qg];W[re]LB[rg:a][rd:b]C[White captures the two Black stones by playing 'a' or 'b'.])))
(;W[]C[White plays elsewhere. Black continues with 'a' to 'c'.

Black 'a': gives White territory.
Black 'b', 'c': White choice of territory or outside fighting.]N[White tenuki]LB[nd:a][lc:b][kc:c]
(;B[nd]LB[mc:a][nc:b]C[White continues with 'a'. White 'b' is slow and produces a heavy shape.]N[(a)]
(;W[mc]C[The exchange of the pressing play of Black 5 and White 6 is the classical way of handling this position. Nowadays, however, players do not like to give White secure territory so this joseki is not used very often.

Black can play elsewhere or continue locally with 'a' or 'b'.]LB[ld:a][kc:b]N[(a)]
(;B[ld]LB[lb:a][md:b][qc:c]C[White continues with 'a' or 'c'. White 'b' leads to a trap. White 'c' gives White life in sente.]N[(a)]
(;W[lb]N[(a)];B[md];W[jc])
(;W[md]N[(b)];B[me];W[le];B[lc]LB[nc:a][ne:b][mb:c]C[White continues with 'a'. White 'b' is a mistake. White 'c' confines White completely.]
(;W[nc]N[(a)];B[ne];W[lb];B[kb];W[ma];B[jd];W[qb])
(;W[ne]C[White 12 is a mistake.]N[mistake (b)];B[mf];W[od];B[nf];W[oe];B[mb]LB[nc:a][of:b]C[White continues with 'a'. White 'b' is a mistake.]
(;W[nc]N[(a)];B[of])
(;W[of]C[White 18 is a mistake.]N[mistake (b)];B[nc];W[pf];B[qf];W[qg];B[rg]LB[qh:a][rf:b]C[White continues with 'a'. White 'b' is unreasonable.]
(;W[qh]N[(a)];B[rh];W[qi];B[ri];W[qj];B[qc])
(;W[rf]C[White 24 is unreasonable.]N[mistake (b)];B[qe];W[rh];B[pg];W[qh];B[og];W[qc];B[rc];W[qb];B[rb];W[re];B[rd]
;W[ob];B[ra]LB[qa:a]C[Black must play 37, not 'a'. White cannot save the stones in the corner.])))
(;W[mb]N[(c)];B[ke];W[lf];B[lb]LB[ne:a][qc:b]C[White may try the cut at 'a' or attachment at 'b'.]
(;W[ne]N[(a)];B[mf];W[nf];B[mg];W[od];B[ng]LB[of:a][pf:b]C[White may try 'a' or 'b'. Neither work.]
(;W[of]N[(a)];B[pg])
(;W[pf]N[(b)];B[qf];W[pg];B[qg];W[ph];B[of];W[oe];B[og];W[qb];B[pi]C[Black 31 is the nose attachment (hana-tsuke) tesuji.];W[qh];B[qi]
;W[oh];B[rh]C[The five White stones will have trouble.]))
(;W[qc]N[(b)];B[rc];W[pc];B[nf];W[rb];B[rd];W[sb];B[kf];W[lg];B[kg];W[lh];B[nh])))
(;W[qc]N[(c)];B[rc];W[pb];B[qb];W[pc]LB[md:a][rb:b]C[Black continues with 'a', not 'b'.]
(;B[md]N[(a)];W[rb];B[sb];W[ra];B[re])
(;B[rb]C[Black 13 is a mistake.]N[mistake (b)];W[oe]C[White escapes to the center.])))
(;B[kc]LB[md:a][ic:b]C[Black plays this way to emphasize the top. White continues with 'a' or 'b' ('b' to thwart Black's plan).]N[(b)]
(;W[md]N[(a)];B[hc])
(;W[ic]N[(b)];B[ld];W[qc]C[White tries to live.];B[rc];W[rb])))
(;W[nc]C[White 6 is poor.]N[not good (b)];B[md]LB[mc:a][lc:b]C[White continues with 'a'. White 'b' involves a ladder.]
(;W[mc]N[(a)];B[ld];W[kc])
(;W[lc]LB[mc:a][ld:b]C[Black plays 'a' with a favorable ladder, Black if not.]N[(b)]
(;B[mc]C[Black must have the ladder to play this way.]N[(a)];W[mb];B[nb]LB[ob:a][lb:b]C[Black plays this way then the ladder to capture 8 is favorable. White continues with 'a' or 'b'.]
(;W[ob]N[(a)];B[lb];W[na];B[kc])
(;W[lb]N[(b)];B[ob];W[pc];B[pb];W[qc];B[qb];W[rb];B[rc];W[rd];B[sc];W[sd];B[re];W[sb]
;B[rc]C[White loses.]))
(;B[ld]N[(b)];W[kc];B[mc];W[mb];B[lb];W[nb];B[jc]LB[kb:a][kd:b]C[Black 15 is a tesuji. White must play 'a', not 'b'.]
(;W[kb]N[(a)];B[kd])
(;W[kd]C[White 16 is a mistake. The White stones below will be captured.]N[mistake (b)];B[kb])))))
(;B[lc]LB[nd:a][qb:b][oe:c]C[White continues with 'a' or 'b'. White 'c' is a mistake.]N[(b)]
(;AE[pc]W[nd]LB[pc:a][ic:b]C[Black continues with 'a' or 'b'.]N[(a)]
(;B[pc]N[(a)];W[id];B[le];W[nf];B[lg];W[nh])
(;B[ic]N[(b)];W[qb];B[qi];W[rc]))
(;W[qb]N[(b)];B[nd];W[nc];B[md];W[rc])
(;W[oe]C[White 6 is a mistake.]N[mistake (c)];B[of];W[ne];B[le];W[nf];B[og]))
(;B[kc]LB[mc:a][qb:b][ic:c]C[White continues with 'a' or 'b'. White 'c' is also possible if White greatly favors the top.]N[(c)]
(;W[mc]N[(a)];B[pc];W[me];B[ke];W[mg])
(;W[qb]N[(b)];B[nd];W[nc];B[md];W[lb];B[kb];W[lc];B[ld];W[rc];B[je])
(;W[ic]N[(c)];B[nd];W[mc];B[ld]C[The same as variation 2-1-1-5-1-1-2-2.];W[qc];B[rc];W[rb])))
(;W[nd]C[White 4, known as the "double diagonal move", is no longer joseki, as Black gets a favorably thick shape.]N[kosumi (diagonal move) (f)];B[ne];W[me];B[nf];W[kc];B[mf]))
(;B[pf]LB[qc:a][lc:b][kc:c][qh:d][dp:e]C[The knight's move of Black 3 is a quiet response to White's kakari. It is not as solid as the diagonal play but it is more flexible, since Black can make a wider extension along the right side.

The main difference between the diagonal play and the knight's move is that White has the option of attaching at 'a'. White 'b' through 'd' are other options, depending upon strategic considerations.

Variation 5 illustrates White playing elsewhere.

e5, d4, c3, b2, a1]N[keima (knight's move) (b)]
(;W[qc]N[(a)];B[rc];W[pd]LB[qe:a][qb:b]C[Black continues with 'a' or 'b'.]
(;B[qe]N[(a)];W[qb];B[qj])
(;B[qb]LB[qe:a][pc:b]C[White continues with 'a'. White 'b' creates bad shape.]N[(b)]
(;W[qe]N[(a)];B[pc];W[rd]LB[qc:a][od:b]C[Black continues with 'a'. Black 'b', provoking a ko, is unreasonable.]
(;B[qc]N[(a)];W[pe];B[od];W[oe];B[nd];W[lc];B[ne];W[of];B[nc])
(;B[od]C[Black 11 is unreasonable. There is no ko threat big enough.]N[mistake (b)];W[qc]))
(;W[pc]C[White 8 is not recommended.]N[not good (b)];B[qe];W[lc])))
(;W[lc]LB[pc:a][qj:b]C[Black continues with 'a'. There is no reason to immediately play 'b'.]N[2-space extension (b)]
(;B[pc]N[(a)];W[od];B[ph])
(;B[qj]C[Black 5 is premature.]N[not good (b)];W[qc];B[rc];W[pd];B[qe]LB[qb:a][pb:b]C[White can play elsewhere or 'a'. If Black 'a', White 'b'.]))
(;W[kc]LB[ic:a][mc:b]C[Black continues with 'a' or 'b'.]N[3-space extension (c)]
(;B[ic]N[(a)];W[qc];B[rc];W[pd];B[qe];W[qb];B[qj])
(;B[mc]LB[mb:a][qc:b]C[Black continues with 'a', or may try 'b'.]N[(b)]
(;W[mb]N[(a)];B[lb];W[lc];B[nb];W[md];B[nc];W[nd];B[od];W[ob];B[ma];W[oa];B[na];W[kb]
;B[pc];W[oe];B[pd])
(;W[qc]N[(b)];B[rc];W[pd]LB[qb:a][qe:b]C[Black continues with 'a'. Black 'b' is weak.]
(;B[qb]N[(a)];W[qe];B[pc];W[rd];B[qc];W[pe];B[od];W[oe];B[nd])
(;B[qe]C[Black 9 is weak.]N[not good (b)];W[mb]))))
(;W[qh]C[White plays this way when the right is important.]N[right side (d)];B[kc]LB[pk:a]C[Black plays 2 or 'a', depending on whole board strategy.])
(;W[]C[White plays elsewhere (tenuki). Black 'a' and 'b' are possible follow-ups.]N[White tenuki]LB[kc:a][pc:b]
(;B[kc]LB[qc:a][mc:b][ld:c]C[White continues with 'a' to 'c'.]N[(a)])
(;B[pc]LB[kc:a][od:b]C[White 'a' is a light move; White could also play elsewhere. White 'b' is a mistake.]N[(b)]
(;W[kc]N[sangen hiraki (3-space extension) (a)])
(;W[od]C[White 6 is a mistake. White creates a target for attack.]N[tachi (stand up): mistake (b)];B[ld]))))
(;B[qg]LB[pf:a][kc:b][jc:c]C[The primary objective of Black 3 is to ensure his own safety rather than attack White. If White is thick at the bottom, Black 3 serves to forestall an attack while erasing that thickness. That this is a negative attitude is undeniable.

White's local responses include 'a' through 'c'. Playing elsewhere is also usual, as Black has already played submissively.]N[(2-space extension) (c)]
(;W[pf]N[(a)];B[qf];W[qc];B[rc];W[pd]LB[qe:a][qb:b]C[Black continues with 'a'. Black 'b' is unreasonable.]
(;B[qe]N[(a)];W[qb])
(;B[qb]N[(b)];W[qe];B[pc];W[rd];B[qc];W[rf];B[od];W[pe];B[nc]LB[ob:a]C[Black position is weak as White can aim at extending at 'a'.]))
(;W[kc]N[(b)];B[mc]LB[mb:a][pf:b]C[White continues with 'a' or 'b'.]
(;W[mb]N[(a)];B[lb];W[lc];B[nb];W[md];B[nc];W[nd];B[od];W[ob];B[ma];W[oa];B[na];W[kb]
;B[pc];W[oe];B[pd])
(;W[pf]LB[qf:a][od:b]C[Black continues with 'a' or 'b'.]N[(b)]
(;B[qf]N[(a)];W[mb]LB[pe:a][lb:b]C[Black continues with 'a'. Black 'b' is reckless.]
(;B[pe]N[(a)];W[md])
(;B[lb]C[Black 9 won't work.]N[mistake (b)];W[lc];B[nb];W[md];B[nc];W[nd];B[od];W[pd];B[oe];W[pe]))
(;B[od]LB[qf:a][nd:b]C[White continues with 'a'. White 'b' is not joseki.]N[(b)]
(;W[qf]N[(a)];B[pc]C[The swap is locally favorable for Black, but given White thickness at right-bottom, White should be okay.])
(;W[nd]N[mistake (b)];B[oe];W[nc];B[pc]LB[md:a][qf:b]C[Black 11 makes nice shape.
White continues with 'a'. White 'b' is unreasonable.]
(;W[md]N[(a)];B[qf])
(;W[qf]C[White 12 is unreasonable.]N[mistake (b)];B[ne];W[md];B[rf];W[re];B[rh]LB[qe:a][og:b]C[If White 'a', Black 'b', and White is in trouble.])))))
(;W[jc]N[(c)];B[lc]LB[pf:a][gc:b][of:c]C[White continues with 'a' to 'c'.]
(;W[pf]LB[qf:a][od:b]C[Black continues with 'a'. Black 'b' is bad.]N[(a)]
(;B[qf]N[(a)];W[qc];B[rc];W[pd]LB[qe:a][qb:b]C[Black continues with 'a' or 'b'.]
(;B[qe]N[(a)];W[qb];B[le])
(;B[qb]N[(b)];W[qe];B[pc];W[rd];B[qc];W[rf];B[od];W[pe];B[nd]))
(;B[od]C[Black 7 is a mistake.]N[mistake (b)];W[nd];B[oe];W[pc];B[nc];W[ne]LB[mc:a][pd:b]C[White 12 makes miai of 'a' and 'b'. Black is in trouble.]))
(;W[gc]N[(b)];B[pc];W[od];B[pf];W[me];B[le];W[lf];B[ke];W[mg])
(;W[of]C[This reverts to variation 2-1-5-1.]N[(c)];B[me])))
(;B[mc]LB[pe:a][oe:b][md:c][qc:d][dp:e][ne:f][pd:g]C[This is the severest attacking move, emphasizing Black's advantage from playing first in the corner. The feature of the one-space pincer is that it does not permit White to swtich lightly elsewhere. Many top-flight professionals are fond of this move.

White's possible responses are 'a' through 'f'. 'e' (playing elsewhere) and  'f' are not joseki.

White 'g' is sometimes seen in amateur games, and is not joseki.

g7, f6, e5, d4, c3, b2, a1

outcomes:
a1, b2 - White takes the top
c3 - different outcomes
d4 - White gets the corner or right, depending on Black]N[ikken basami (1-space low pincer) (d)]
(;W[pe]LB[pd:a][qe:b][qg:c][qf:d]N[kake (press-down) (a)]C[The point of White 4 is to block at 'b' if Black plays elsewhere.

Black continues with 'a' or 'b' in joseki.

Black 'c' is a trick play, the aim to induce White 'b' and use the Black corner stone as a sacrifice in order to squeeze White.

Black 'd' is a mistake.]
(;B[pd]N[(a)];W[od];B[oe];W[ne];B[of];W[md]LB[pf:a][ld:b]C[Black continues with 'a' or 'b'.]
(;B[pf]N[(a)];W[lc]LB[nf:a][dp:b]C[Black continues at 'a'. To play elsewhere ('b') invites White to gain influence in the center. 'a' is a junction point for both players.]
(;B[nf]LB[mf:a][dp:b]C[White must continue at 'a'. Black will dominate if White plays elsewhere ('b').]N[(a)]
(;W[mf]N[(a)];B[mg];W[lf];B[lg];W[kf];B[qk])
(;W[]C[White plays elsewhere, a mistake.]N[White tenuki: mistake (b)];B[me];W[nd];B[le];W[ld];B[ke]))
(;B[dp]C[Black plays elsewhere, a mistake.]N[mistake (b)];W[nf]LB[oh:a][ng:b]C[Black continues at 'a'. The hane of Black 'b' is unreasonable.]
(;B[oh]N[(a)];W[ng];B[ph]LB[pi:a][qh:b]C[Black should not play 17 at 'a', as it leaves 'b' for White to aim at.])
(;B[ng]C[Black 15 is unreasonable.]N[mistake (b)];W[og];B[oh];W[pg];B[qf];W[qg]LB[rf:a][pi:b]C[Black may try 'a' or 'b'.]
(;B[rf]N[(a)];W[pi])
(;B[pi]N[(b)];W[rf];B[qe];W[rh];B[qi];W[ri]LB[qk:a][qb:b]C[Black is at a loss for continuation. If Black 'a', White takes Black's eye in the corner with 'b' and Black loses the fight. If Black 'b', White 'a'. Black's tactics have not worked out.]))))
(;B[ld]N[(b)];W[le];B[kd];W[ke];B[jd];W[re]C[A tesuji.];B[qb]LB[qe:a][pf:b]C[White continues with 'a' or 'b'.]
(;W[qe]N[(a)];B[ob];W[pc];B[qc];W[pb];B[nc];W[nd];B[pa];W[nb];B[oa];W[mb];B[lc];W[nf]
;B[og];W[rc]LB[ra:a][rd:b][lb:c]C[Black continues with the tesuji of 'a'. Black 'b' leads to collapse. 

Black 'c' is disfavorable, but not necessarily disasterous. Still, Black 'c' leaves Black at a loss in gote.]
(;B[ra]N[(a)];W[ng];B[oh];W[qh])
(;B[rd]N[(b)];W[rb];B[sd];W[ra];B[qa];W[se])
(;B[lb]C[Black 33 ends in Black gote, at best.]N[not good (c)];W[ra]LB[qa:a][rb:b]C[Black 'a' is correct. Black 'b' leads to an unecessary ko.]
(;B[qa]N[(a)];W[rb];B[ma];W[rd];B[na])
(;B[rb]C[Black 35 leads to an unnecessary ko.]N[mistake (b)];W[sb]C[Ko ensues.])))
(;W[pf]N[(b)];B[og];W[pc];B[qc]LB[qh:a][pb:b]C[White continues with 'a', or 'b' to prevent connection. ]
(;W[qh]N[(a)];B[nc];W[nd];B[ob];W[pi])
(;W[pb]C[White prevents connection of the two Black groups. Played properly by Black, White loses points in the corner.]N[(b)];B[qe];W[qf];B[rf];W[rg];B[sf]LB[ph:a][sg:b][se:c]C[White continues with 'a'. Capturing the two Black stones ('b' or 'c') leads to a loss for White, as Black throws in at Black 25.];W[ph];B[rd];W[qi]
))))
(;B[qe]N[(b)];W[pf];B[qg]LB[jc:a][qc:b]C[White continues with 'a'. White 'b' is premature.]
(;W[jc]N[(a)];B[me];W[pg];B[qh];W[ph];B[pi];W[qf];B[rf];W[rg];B[rh];W[re];B[sg];W[qc]
;B[rd];W[oi])
(;W[qc]C[White 8 is premature.]N[not good (b)];B[pd]
(;W[od]N[(a)];B[pc];W[pb];B[qb];W[qf]LB[ob:a][rf:b]C[Black continues with 'a'. Black 'b' is a mistake.]
(;B[ob]N[(a)];W[rg])
(;B[rf]C[Black cannot afford to play 'b'.]N[mistake (b)];W[rc];B[rd];W[rb]C[White make small life in the corner and has some thickness.]))
(;W[pc]C[White 10 is a mistake: Black's resulting thickness is excellent.]N[mistake (b)];B[od];W[nc];B[nd];W[mb];B[lc];W[lb];B[kc])))
(;B[qg]LB[qe:a][me:b][md:c]C[Black 5 is a trick play.

White naturally wants to reply at 'a', which is okay given the proper follow-up.

The light move at 'b' is also feasible. White 'c' is interesting as well.]N[trick (c)]
(;W[qe]LB[pd:a][re:b]C[Black may try 'a' or 'b'.]N[(a)]
(;B[pd]N[(a)];W[od];B[re]LB[rf:a][of:b]C[White 'a' is bad. White has to defend with 'b'.]
(;W[rf]N[(a)];B[rd];W[qf];B[oe];W[of];B[ne];W[qb];B[rg]LB[sf:a][sg:b]C[White 'a' and 'b' are both bad.]
(;W[sf]N[(a)];B[pg];W[pf];B[pc];W[pb];B[ob];W[nb];B[nc];W[oa];B[nd];W[ob];B[ng];W[rc]
;B[nf];W[sd];B[og];W[se];B[sg];W[qc])
(;W[sg]N[(b)];B[pg];W[pf];B[rb];W[qc];B[rc]LB[nb:a][ra:b]C[Neither White 'a' nor 'b' work.]
(;W[nb]N[(a)];B[se];W[sf];B[ra]C[White must find life for the five White stones in the corner.];W[mb]C[Crawling along the second line is terrible.];B[lc];W[lb];B[kc];W[kb];B[jc])
(;W[ra]N[(b)];B[pc];W[pb];B[ob];W[nb];B[oa];W[na];B[nc];W[pa];B[ob];W[oa];B[nd])))
(;W[of]N[(b)];B[rc]C[Black 11 is necessary.];W[ld]C[White gets thick with 12.]))
(;B[re]LB[pd:a][ne:b][md:c][rf:d]C[White continues with 'a' or 'b'. 

Shusaku played White 'c' when Ota Yuzo played this trick play against him. An exchange results, but the position is not desirable for either player.

White must not hane at 'd'. ]N[(b)]
(;W[pd]N[(a)];B[rd];W[qc];B[rc];W[qb])
(;W[ne]N[(b)];B[rc];W[ld])
(;W[md]N[(c)];B[pd];W[lc];B[oe])
(;W[rf]C[White falls into what is known as the "nineteen point trick move". White's profit is 19 points in gote, but in the process gives Black walls of steel. The dangerous thing about this trick is that White's moves along the way seem natural.]N[hamete (non-obvious bad move) (d)];B[rd];W[qf];B[pd];W[od];B[oe];W[of];B[ne];W[qb];B[pc];W[pb];B[ob]
;W[nb];B[nc];W[oa];B[nd];W[ob];B[rg];W[sf];B[pg];W[pf];B[ng];W[rc];B[og];W[qc]
;B[nf];W[sd])))
(;W[me]N[(b)];B[qe];W[jd])
(;W[md]N[(c)];B[ld];W[me];B[nc];W[nd];B[kc];W[qe];B[ob];W[pc]))
(;B[qf]C[Black 5 is a mistake.]N[mistake (d)]
(;W[qe]N[(a)];B[re];W[pd]LB[qc:a][rd:b]C[Black plays 'a' and surrenders the corner, or 'b' and gives White influence for some territory.]
(;B[qc]C[Black 9 is a sacrifice.]N[(a)];W[rf];B[rg];W[rd];B[sf];W[rc])
(;B[rd]N[(b)]C[Black 9 aims to keep Black's stones together.];W[ph];B[qh];W[pi];B[qi];W[pj]))
(;W[pf]N[mistake (b)]C[White 6 lets Black correct the defect in shape (the gap between Black 1 and 5).];B[qg];W[pg];B[qh])))
(;W[oe]N[ikken tobi (1-space jump) (b)]LB[pf:a][qg:b][pc:c][pg:d]C[The one-space jump of White 4 is the smoothest move and is very common in actual play. White 4 is a good start to a counter attack.

Black continues with 'a'. 

Black 'b' is slow.

Black 'c' is a trick play.

Black 'd' is an overplay.]
(;B[pf]LB[ld:a][ph:b][qc:c]C[Black 5 is the only possible good response by Black. White continues with 'a' or 'b'. White 'b' is servere.

White 'c' is a trick play.]
(;W[ld]LB[pc:a][md:b]C[Joseki continues with 'a'. Black 'b' is reckless; if the ladder is unfavorable, it does not work at all.]N[(a)]
(;B[pc]LB[pb:a][ob:b]C[White continues with 'a' or 'b'.  White 'b' can lead to complications.]N[(a)]
(;W[pb]N[(a)];B[qb];W[pd];B[qc];W[md])
(;W[ob]LB[lc:a][of:b][md:c]N[(b)]C[Black continues with 'a' or 'b'. Black should only play 'b' if the right is very important, because Black 'b', White 'a', and White is better off locally.

Black 'c' is a mistake.]
(;B[lc]N[(a)];W[kd];B[md];W[me]LB[kc:a][nd:b]C[Joseki continues with 'a'.]
(;B[kc]N[(a)];W[jd]LB[ic:a][jc:b]C[Black continues with 'a' or 'b'.]
(;B[ic]N[(a)];W[nd];B[ph])
(;B[jc]LB[of:a][id:b]C[White must play 'a', not 'b'. While White 'a' lets Black extend on the fourth line, a minus for White, White's followup extension at 'b' is a considerable minus for Black, so balance is maintained.]N[(b)]
(;W[of]LB[pg:a][id:b]C[Black continues with 'a' or 'b'.]N[(a)]
(;B[pg]N[(a)];W[id];B[hc])
(;B[id]N[(b)];W[pg];B[qg];W[pe];B[qf];W[qe];B[re];W[qh]C[White's superiority on the right is assured, whatever Black does. This variation is a kind of exchange.]))
(;W[id]C[White 16 is a mistake.]N[mistake (b)];B[ne]LB[pe:a][nf:b][nd:c]C[After Black 17, there is no way White can salvage the situation. 

White 'a' is about the best response, resulting in a Black ponnuki toward the center.

White 'b' leaves cutting points, so is hopeless.

White 'c' looks more promising than it is. Black gets great outside influence.
]
(;W[pe]N[(a)];B[qe];W[of];B[mf]LB[pg:a][le:b]C[White 'a' gives Black a center-facing ponnuki (in sente). White 'b' and White lives in the corner in sente, but mistakes in the order of moves can yield frightening results. Neither result is favorable for White.]
(;W[pg]N[(a)];B[qf];W[og];B[le])
(;W[le]N[(b)];B[od];W[pd];B[nd];W[qc];B[og];W[pb];B[nf];W[pc];B[pg]))
(;W[nf]N[(b)];B[nd]LB[od:a][of:b]C[White has cutting points at 'a' and 'b'.])
(;W[nd]N[(c)];B[nf];W[of];B[og];W[ng];B[mf];W[pg];B[oh];W[pe];B[qf];W[qe];B[re]C[Black has defects but White is short of liberties.]
;W[rf];B[qg];W[rd];B[od];W[se];B[pd];W[re];B[ph]LB[pb:a]C[Black gets overwhelming outside influence.

White can play atari at 'a' to squeeze Black to get life in the corner, but this is small compensation for White.]))))
(;B[nd]N[(b)]C[Black 13 is not described in the joseki books. Variations are possible, even likely.];W[od];B[ne];W[of];B[nf];W[pg];B[qg];W[ng];B[mf];W[qe];B[ph];W[og]
;B[re];W[pd];B[qc];W[rf];B[qf];W[pe];B[sd];W[qh];B[rg];W[rh];B[sf];W[pi]))
(;B[of]N[(b)];W[lc]C[It is regrettable for Black to let White settle his stones with White 10, so this variation is only playable if Black 9 works extremely well on the right side.])
(;B[md]C[Black 9 is a mistake.]N[mistake (c)]LB[lc:a][me:b]
(;W[lc]LB[me:a][lb:b]C[Black may try 'a' or 'b'.]N[(a)]
(;B[me]N[(a)];W[mb];B[of];W[kb]C[White 14 ensures connection.

The three Black stones are worthless.])
(;B[lb]N[(b)];W[me];B[kc];W[le]C[Black's shape is thin.]))
(;W[me]C[White 10 lets Black get away with the mistake of playing 9.]N[not good (b)];B[lc];W[kd];B[kc];W[jd];B[ic]))))
(;B[md]N[(b)];W[me];B[le]LB[lc:a][of:b]C[White continues with 'a' if the ladder to catch Black 9 is favorable, or with 'b' if the ladder is unfavorable.]
(;W[lc]LB[ne:a][lb:b]C[Black may try 'a' or 'b'.]N[(a)]
(;B[ne]N[(a)];W[mf];B[nd];W[nf];B[od];W[mb];B[pc];W[ke])
(;B[lb]N[(b)];W[mb];B[nb];W[nc];B[ma];W[nd];B[mb];W[jc]C[Black must crawl along the second line to live, but this is like trying to lose.]))
(;W[of]N[(b)];B[pg];W[lc])))
(;W[ph]N[(b)];B[of];W[md];B[lc];W[nf]LB[ng:a][oh:b]C[Black continues with 'a' or 'b'.]
(;B[ng]LB[mf:a][og:b]C[White continues with 'a' or the very tough 'b'. White 'b' was introduced by Fujisawa Shuko in the 1971 Meijin Title against Rin Kaiho.]N[(a)]
(;W[mf]C[White 6 shows the severity of modern Go. When playing like this, it is desirable to have White stones in the top left corner.]N[(a)];B[oh]LB[pj:a][ic:b]C[White could continue with 'a' or 'b', depending on the side with support (the right for 'a', the top for 'b').]
(;W[pj]N[(a)];B[pc];W[nc];B[ic])
(;W[ic]N[(b)]))
(;W[og]LB[pe:a][pg:b]N[(b)]C[Black 'a' was played originally in the 1971 Meijin Title: Fujisawa Shuko vs. Rin Kaiho. Subsequent research revealed Black 'b' is better.]
(;B[pe]N[(a)];W[mf];B[nh];W[pj];B[pc];W[od];B[jd];W[lg])
(;B[pg]N[(b)];W[oh];B[ne];W[mf];B[nd];W[qc];B[od];W[rd];B[pd];W[mh]LB[pc:a][re:b]C[The sequence ends. Later, Black may play 'a', or possibly 'b'.]

(;B[pc]N[(a)];W[rb];B[qb];W[rc];B[pb];W[rf];B[rg];W[qh];B[qg];W[qe];B[pe];W[ra])
(;B[re]N[(b)];W[pc]))))
(;B[oh]LB[pe:a][pj:b]C[White continues with 'a' or 'b'.]N[(b)]
(;W[pe]N[(a)];B[qe];W[og];B[ng];W[pg];B[qf];W[mf];B[pi];W[nh];B[oi];W[mg];B[qh];W[ic]
)
(;W[pj]N[(b)];B[ng];W[mf];B[pc];W[nc];B[ic])))
(;W[qc]N[trick (c)]LB[pd:a][rc:b]C[White 'c' is a trick play that should not work. Black continues with 'a'. Black 'b' is weak.]
(;B[pd]N[(a)]LB[pc:a][nc:b]C[White may try 'a' or 'b'.]
(;W[pc]N[(a)];B[od];W[nd];B[nc];W[rd];B[re];W[rc];B[qg]C[Black gets a superior result.])
(;W[nc]C[White 8 is not good.]N[not good (b)];B[pc];W[md];B[lc]C[White has gained nothing.]))
(;B[rc]C[Black 7 is weak, and lets White succeed.]N[mistake (b)];W[qb];B[pd];W[nc];B[md];W[ne])))
(;B[qg]LB[pf:a][jd:b][jc:c]N[(b)]C[Black 5 is slow.

White can playing the forcing move of 'a', then settle his shape, or stake out the top with 'b' or 'c' at some risk to the White corner stones.]
(;W[pf]N[(a)];B[qf];W[qc];B[rc];W[pd];B[qe];W[qb]C[White is settled.];B[jc])
(;W[jd]AW[cc]C[White plays a high extension/pincer from the corner.]N[(b)];B[me];W[og])
(;W[jc]AW[dd]C[White plays a low extension/pincer.]N[(c)];B[pc]LB[ob:a][pd:b]C[White continues with 'a' or 'b'.]
(;W[ob]C[White 8 keeps the Black stones separated.]N[(a)];B[me];W[og];B[je];W[hc])
(;W[pb]N[(b)];B[qb];W[pd];B[qc]LB[og:a][ld:b]C[White continues with 'a'. White 'b' is not recommended.]
(;W[og]N[(a)];B[le];W[lg];B[je];W[hc])
(;W[ld]N[(b)];B[ob];W[nb];B[pa];W[nc]C[White is overconcentrated.]))))
(;B[pc]N[trick (c)]LB[pb:a][ob:b]C[Black 5 is a trick play.

White replies with 'a'. White 'b' is not good.]
(;W[pb]LB[qb:a][od:b]C[Black may try 'a' or 'b'.]N[(a)]
(;B[qb]N[(a)];W[pd];B[qc];W[qe];B[re];W[qf];B[rf];W[qg])
(;B[od]N[(b)];W[nd];B[pd];W[nc];B[ne];W[md];B[nf];W[qb]))
(;W[ob]C[White 6 is not recommended.]N[not good (b)];B[pf]C[Black plays 7 and Black 5 is left as an effective forcing move.]))
(;B[pg]N[thin (d)]LB[nc:a][qe:b]C[Black 4 is an overplay; too thin.

White continues with 'a'. White 'b' is unreasonable.]
(;W[nc]LB[pe:a][md:b]C[White 6 looks slow, but it is the move.

Black may try 'a' or 'b'.]N[(a)]
(;B[pe]N[(a)];W[md]C[White 8 makes good shape at top.])
(;B[md]N[(b)];W[qe];B[pe];W[pd];B[pf];W[qc];B[rd];W[re];B[rc];W[rb]C[White 16 is the tesuji.];B[qb];W[pc]
;B[ra];W[sb]))
(;W[qe]C[White 6 is not recommended.]N[not good (b)];B[pd];W[pe];B[od];W[nd];B[nc];W[rd];B[pb]C[Black 13 is the tesuji to save the Black stones.

This result favors Black.])))
(;W[md]N[tsuke (attach) (c)];B[ld]LB[nd:a][me:b]C[White continues with 'a' or 'b'.]
(;W[nd]LB[qg:a][kc:b]C[Black continues with 'a' or 'b', though Black should only play 'b' with a favorable ladder off 'a'.]N[(a)]
(;B[qg]N[(a)];W[lc];B[kc];W[lb]LB[kd:a][kb:b]C[Black connects at 'a'. Black 'b' leaves a cutting point (at 'a'), which Black must take care of in gote.];B[kd]LB[mb:a][kb:b]C[White continues with 'a'. White 'b' is disadvantageous.]
(;W[mb]N[(a)])
(;W[kb]C[White 12 is a mistake, even with a favorable ladder.]N[mistake (b)];B[jb];W[jc];B[ib]C[Black 15 assuming the ladder does not work.];W[mb];B[id]C[Even though Black has ended in gote, Black is solid. White should not play this way.]))
(;B[kc]LB[pf:a][pg:b][qf:c][qe:d][qg:e]C[White continues with 'a' to 'd'. White must have the ladder to play 'a'.

White 'e' is not recommended.]N[(b)]
(;W[pf]C[White must have the ladder to play this way.]N[White ladder (a)];B[qf];W[qg];B[pg];W[qe];B[rf];W[of]LB[re:a][qh:b]C[Black 'a' is joseki. Black 'b' invites a loss in the corner.]
(;B[re]N[(a)];W[ph];B[qb];W[og])
(;B[qh]C[Black 15 gives the corner away.]N[mistake (b)];W[re];B[rg];W[pd]))
(;W[pg]LB[pc:a][pe:b]C[Black continues with 'a' or 'b'.]N[(b)]
(;B[pc]N[(a)];W[pb];B[qb];W[pd];B[qc];W[pe];B[rf];W[qh])
(;B[pe]N[(b)];W[nf];B[pc];W[ob];B[pb];W[lf]))
(;W[qf]N[(c)];B[pf]LB[pg:a][qe:b]C[White continues with 'a'. White 'b' is unreasonable.]
(;W[pg]N[(a)];B[pe]LB[og:a][mf:b]C[White continues with 'a' (gote), or 'b' to have sente.]
(;W[og]N[(a)];B[qg];W[qh];B[rg];W[rh];B[rf];W[mf])
(;W[mf]N[(b)];B[qg];W[qh];B[rg];W[ph];B[rf]))
(;W[qe]C[White 10 is unreasonable.]N[mistake (b)];B[pe];W[pd];B[qc]C[It would be hard to kill the two Black stones in the corner. If White attempts it, Black will sacrifice them to gain outside thickness. In any event, Black has an easy fight.]))
(;W[qe]LB[re:a][pd:b]C[Black continues with 'a'. Black 'b' is vulgar.]N[(d)]
(;B[re]N[(a)];W[pd];B[qf];W[pe];B[qc]LB[rd:a][rf:b]C[White cuts at 'a' if the ladder to capture 11 is favorable, 'b' if the ladder is unfavorable.]
(;W[rd]C[White plays 14 when the ladder to capture Black 11 is favorable.]N[White ladder (a)];B[rc];W[rf];B[sd];W[qg])
(;W[rf]C[White plays 14 when the ladder is unfavorable.]N[Black ladder (b)];B[rg];W[rd];B[sf];W[rc]C[White captures the two Black stones in the corner.]))
(;B[pd]C[Black 9 is a mistake.]N[mistake (b)];W[pe]LB[od:a][re:b]C[Black 'a' is better than 'b'.]
(;B[od]N[(a)];W[oe];B[nc];W[rd]LB[pb:a][pc:b][ob:c]C[Black 'a' is best, Black 'b' and 'c' inferior.]
(;B[pb]N[(a)];W[qc];B[pc];W[qb];B[ob];W[qj])
(;B[pc]N[(b)];W[pb])
(;B[ob]N[(c)];W[qc]))
(;B[re]N[(b)];W[rf];B[oe];W[od];B[rd];W[pg])))
(;W[qg]C[White 8 is not recommended, as White is split.]N[(e)];B[pf];W[pg];B[of];W[qf];B[qe];W[mf];B[og])))
(;W[me]C[Attaching and extending is more positive than attaching and drawing back.]N[(b)];B[nc]LB[od:a][pe:b]C[White continues with 'a' or 'b'. White should have the ladder to play 'b'.]
(;W[od]LB[pf:a][qf:b][nd:c]C[White builds influence and aims at attacking Black on both sides.

Black continues with 'a' to 'c'. 

Black 'c' is direct and forceful. Black sacrifices the corner. Black must be confident in the fight that follows.]N[(a)]
(;B[pf]N[(a)];W[of];B[pg];W[jd];B[le];W[lf];B[ke];W[qc];B[rc];W[rd];B[qb]LB[ob:a][pc:b]C[White continues with 'a'. White 'b' is a mistake.]

(;W[ob]N[(a)];B[qe];W[lc];B[kc];W[lb];B[jc];W[mb];B[id])
(;W[pc]C[White 20 is a mistake.]N[mistake (b)];B[re];W[rb];B[sd]C[White cannot make two eyes, as the following sequence shows.];W[sb]C[White cannot make two eyes.];B[ra];W[pb];B[qa]))
(;B[qf]N[(b)];W[pe];B[ic]C[White continues with 'a' to 'c'.]LB[qe:a][pg:b][qh:c]
(;W[qe]N[(a)];B[re];W[rd]C[Black continues with 'a' or 'b'.]LB[rc:a][rf:b]
(;B[rc]N[(a)];W[rf];B[sd];W[qg];B[qb];W[pf])
(;B[rf]N[(b)];W[qc];B[qj]))
(;W[pg]N[(b)];B[qh];W[qe];B[re];W[rd];B[rf];W[qc])
(;W[qh]N[(c)];B[qe];W[oh];B[qb]))
(;B[nd]C[Black 9 is a fighting move.]N[(c)];W[ne];B[oe];W[pe];B[of];W[pd];B[kc];W[mg];B[oh];W[qe];B[kf];W[ng]
;B[og];W[mi];B[oj]))
(;W[pe]LB[ob:a][qe:b]C[White 8 is somewhat a trick play. This move was researched and used in games around 1910.

Black continues with the simple 'a', or 'b' to risk a fight.]N[trick (b)]
(;B[ob]N[(a)];W[pc];B[pb];W[qc])
(;B[qe]N[(b)];W[pf]LB[qf:a][qg:b]C[Black continues with 'a'. Black must not jump to 'b', as he cannot afford the cut.

White must have the ladder to succeed.
]
(;B[qf]LB[pg:a][nd:b]C[White can play at 'a', but 'b' is preferable.]N[(a)]
(;W[pg]N[(a)];B[qh])
(;W[nd]LB[kc:a][pd:b]C[Black 'a' leads to fighting. Black 'b' sacrifices the two Black stones (3 & 7) for the right.]N[(b)]
(;B[kc]N[(a)];W[qh]LB[qc:a][qg:b]C[Black continues with 'a' or 'b'.]
(;B[qc]N[(a)];W[pb];B[qg]C[The push and cut by Black are unwise.];W[pg];B[ph];W[qi];B[oh];W[le])
(;B[qg]N[(b)];W[pg]LB[qi:a][rh:b]C[Black continues with 'a'. Black 'b' is cowardly.]
(;B[qi]N[(a)];W[rh];B[ph]LB[pd:a][oh:b]C[Black has 'a' and 'b' available, so the fight should be favorable if missteps are avoided.])
(;B[rh]C[Black crawls along "the line of defeat".]N[mistake (b)];W[qi];B[ri];W[qj])))
(;B[pd]N[(b)];W[od];B[pg];W[lc];B[pb];W[ob])))
(;B[qg]C[Black 11 is a mistake.]N[mistake (b)];W[ob]LB[kc:a][qb:b]C[Neither Black 'a' nor 'b' work if White has the ladder.

White captures Black 3,7 if Black 'b'.]
(;B[kc]N[(a)];W[qf]C[White must have the ladder to play this way.];B[rf];W[re]LB[rg:a][rd:b]C[Black 'a' is a mistake. White needs a ladder if Black 'b'.]
(;B[rg]N[(a)];W[rd];B[qc];W[rc];B[rb];W[qb];B[pb];W[qa];B[ra];W[pc];B[pa];W[qb];B[qa]
;W[pd])
(;B[rd]N[(b)];W[rg];B[se];W[qh]))
(;B[qb]N[(b)];W[lc];B[kc];W[lb];B[kb];W[mb]))))))
(;W[qc]C[The aim of White's 3-3 contact play is to settle the situation quickly.]N[tsuke (attach) (d)];B[rc]LB[pd:a][rb:b]C[White continues with 'a'. White 'b' gives Black excellent thickness.]
(;W[pd]LB[qe:a][qb:b]C[Black continues with 'a' or 'b'.]N[(a)]
(;B[qe]N[(a)];W[qb];B[pg]LB[rb:a][dp:b]C[White continues with 'a'. Playing elsewhere ('b') is not recommended, as White is threatened and Black strengthened in sente.]
(;W[rb]N[(a)];B[qk])
(;W[]C[White 10, playing elsewhere, is a mistake.]N[White tenuki: mistake (b)];B[rb];W[md];B[ld];W[nd];B[kc];W[pe];B[pf];W[nf]))
(;B[qb]N[(b)];W[qe];B[pc]LB[rd:a][pb:b]C[White continues with 'a'. White 'b' is hopeful, and a mistake.]
(;W[rd]LB[qc:a][od:b]C[Black continues with 'a'. Black 'b' is unreasonable.]N[(a)]
(;B[qc]N[(a)];W[oe];B[nd];W[od];B[ob])
(;B[od]C[Black cuts, but cannot fight the ko. Black 11 is a mistake.]N[mistake (b)];W[qc];B[pb];W[pe]LB[oe:a][nd:b]C[Black continues with 'a' or 'b'.]
(;B[oe]N[(a)];W[of];B[me];W[qi])
(;B[nd]N[(b)];W[qi])))
(;W[pb]LB[pe:a][qc:b]C[White 10 is a mistake. Black continues with 'a'. Black 'b' is what White hopes for.]N[mistake (b)]
(;B[pe]N[(a)];W[qc];B[rd]LB[md:a][od:b][oe:c]C[White 'a' is the best move available. White 'b' is not as good, and White 'c' bad.]
(;W[md]N[(a)];B[oe];W[lc];B[od];W[nc];B[pc])
(;W[od]N[(b)];B[qf])
(;W[oe]C[No good will come for White from White 14.]N[mistake (b)];B[pf];W[qf];B[pc];W[od];B[qg];W[pg];B[of]))
(;B[qc]C[Black 11 is a mistake, exactly what White wants.]N[mistake (b)];W[oe];B[re];W[qf]))))
(;W[rb]C[White 6 is a mistake. Black gets wonderful thickness.]N[mistake];B[pc];W[qb];B[pd];W[pb];B[od];W[nc];B[nd]))
(;W[]C[White plays elsewhere. To do so without a favorable ladder is to invite a loss.

Black continues with 'a' or 'b'.]N[White tenuki]LB[od:a][pc:b]
(;B[od]LB[pd:a][pc:b][cq:c]C[White plays 'a' if the ladder is favorable. If the ladder is not favorable, White must play 'b', proving that White should not play elsewhere if the ladder is unfavorable.

'c' show Black's follow-up if White again plays elsewhere.]N[(a)]
(;W[pd]LB[pe:a][pc:b]C[White must have the ladder to play White 6, in which case Black plays 'a'. Black plays 'b' if the ladder is favorable.]N[(a)]
(;B[pe]N[(a)];W[pc];B[nd];W[qc];B[re]LB[rc:a][rd:b]C[White continues with 'a'. White 'b' is sente, but risky.]
(;W[rc]C[White plays 12 to ensure life in the corner.]N[(a)])
(;W[rd]C[White 12 is not recommended.]N[not good (b)];B[qe];W[cq]C[White plays elsewhere.];B[rc];W[rb];B[sd];W[sb];B[pa]C[Black 19 is a tesuji.];W[nb];B[mb];W[oa]LB[nc:a][ma:b][oe:c]C[Black can now play 'a' and 'b' in sente. The value of the cutting point at 'c' has disappeared.]
))
(;B[pc]C[Black only plays 7 if the ladder is favorable.]N[Black ladder (b)];W[pe];B[qc]))
(;W[pc]N[(b)];B[pd]LB[qc:a][nc:b]C[White continues wtih 'a'. White 'b' only makes the loss greater.]
(;W[qc]N[(a)];B[nc];W[rd];B[re];W[rc];B[qf])
(;W[nc]C[White 8 is a mistake.]N[mistake (b)];B[nd];W[mb];B[lc];W[lb];B[kc];W[qc]))
(;W[]C[White plays elsewhere again.]N[White tenuki];B[nc]LB[pc:a][qc:b]C[White 'a' is answered by Black 'b'.]))
(;B[pc]N[(b)];W[od];B[pf];AE[md]W[ne];B[ph];W[ld];B[jc]LB[ic:a]C[Black trying to put Black 3 into play is greedy. Black 11 or 'a' is recommended.];W[lc]))
(;W[ne]LB[pf:a][od:b]C[White 4 appeared in the late 1920's, but the move is odd, hardly joseki. Black continues 'a' or 'b'.]N[keima (knight's move) (f)]
(;B[pf]LB[ld:a][qc:b]C[White continues with 'a' or 'b'.]N[(a)]
(;W[ld]N[(a)];B[pc];W[od];B[ph])
(;W[qc]LB[pd:a][rc:b]C[Black continues with 'a'. Black 'b' is weak.]N[(b)]
(;B[pd]N[(a)];W[pc];B[od]LB[nd:a][nc:b][pj:c]C[If White 'a' and Black 'b', White has to go back and make the corner alive. Consequently, White will leave things as they are and play 'c' to erase Black's thickness, but it is enough for Black to push through at 'a'.])
(;B[rc]C[Black 'b' is submissive.]N[mistake (b)];W[pd];B[qe];W[ld])))
(;B[od]N[(b)];W[nd];B[nc];W[pd];B[oe];W[pe];B[of];W[pc];B[pf];W[qe];B[qf]LB[mf:a][re:b]C[If Black plays 'a' instead of 15, White turns at 15, increasing his territory, and this result is not necessarily favorable for Black. If White 'b' in answer to Black 11, then Black 'a' is alright.]
;W[lf];B[re];W[rd];B[rf];W[rc];B[kd];W[nf];B[qj]C[Black 21 and 23 apply pressure on both sides to White's floating stones. With 23 Black gets territory equal to White's corner and can torment White's center stones for more profit.]))
(;W[pd]C[White 4 is not joseki.]N[not good (h)];B[qc]LB[qe:a]C[Black must resolutely play 5. Black 'a' is spiritless (see variation 2-1-8-3).];W[qe];B[pe]LB[re:a][oe:b]C[White may try 'a' or 'b'. Neither work.]
(;W[re]N[(a)];B[ob]C[After Black 9, there is nothing White can do to cause a favorable result.];W[nb];B[pb];W[nc];B[rd];W[rb];B[qb];W[ra];B[oa];W[sc];B[sd]LB[qa:a][rc:b]C[White's corner stones die. Neither 'a' nor 'b' works for White.]

(;W[qa]N[(a)];B[sb])
(;W[rc]N[(b)];B[qa]))
(;W[oe]N[(b)];B[pf];W[qf];B[qg];W[rg];B[pg];W[rd];B[rc];W[re];B[pc];W[od];B[ob];W[nb]
;B[pb];W[nc];B[rh];W[sd];B[sg];W[sc];B[rb];W[sb];B[qa];W[oa];B[rf])))
(;B[lc]LB[of:a][pe:b][qc:c][qg:d][nd:e][me:f][ld:g][dp:h][oe:i]C[The low two-space pincer used to be the most popular. With modern Go emphasis on influence, the two-space high pincer has replaced it.

Possible White reponses range from 'a' to 'g', including playing elsewhere (h8). White must have the ladder to play 'd' or play elsewhere (h8).

Note, in contrast to the one-space pincer, the one-space jump (shown at i9) is not joseki.

i9, h8, g7, f6, e5, d4, c3, b2, a1

outcomes:
a1 - White pincer at top; White gets out
b2, c3 - different outcomes
d4 - White takes the right
e5 - White gets out, takes part of the corner
f6 - White takes the right
g7 - initial loss, generally White takes the right]N[niken basami (2-space low pincer) (e)]
(;W[of]N[niken tobi (2-space jump) (a)];B[qg];W[ic];B[me]LB[qc:a][pd:b]C[Black 7 is a vital point.

White continues with 'a' or 'b'. Many continuations are the same as with the two-space high pincer; consult those variations (2-1-8).])
(;W[pe]LB[qe:a][pd:b]C[The White pressing move was popular in Edo period (1600-1867) games. White aims to build influence then attack with a pincer of his own. The idea is the same as the two-space jump, but more forceful.

Black continues with 'a' or 'b'. 'b' leads to a difficult joseki.]N[kake (press-down) (b)]
(;B[qe]N[(a)];W[pf];B[qg];W[jc];B[le]LB[pg:a][je:b]C[White continues with 'a' or 'b'.]
(;W[pg]N[(a)];B[qh];W[ph];B[pi];W[oi]LB[pj:a][oj:b]C[Black continues with 'a' or 'b'.]
(;B[pj]N[(a)];W[qf];B[rf];W[rg]LB[re:a][rh:b]C[Black continues with 'a' or 'b'.]
(;B[re]N[(a)];W[je];B[lg];W[nh])
(;B[rh]N[(b)];W[re];B[sg];W[qc];B[rd]))
(;B[oj]N[(b)];W[qf];B[rf];W[re];B[rg];W[qc]LB[rd:a][ni:b]C[Black continues with 'a' or 'b'.]
(;B[rd]N[(a)];W[pj];B[qi];W[ni];B[je])
(;B[ni]N[(b)];W[rd];B[oh])))
(;W[je]LB[ne:a][lg:b]C[Black continues with 'a' (joseki). Black 'b' allows White good shape. ]N[(b)]
(;B[ne]LB[qf:a][pd:b]C[White continues with 'a'. White gets sealed in if he plays 'b'.]N[(a)]
(;W[qf]N[(a)];B[rf];W[pg]LB[pd:a][qh:b]C[Black continues with 'a' or 'b'.]
(;B[pd]N[(a)];W[od];B[oe];W[rg];B[re];W[qh])
(;B[qh]N[(b)];W[pd];B[qc]C[Black 17 is a strategic point.];W[md]))
(;W[pd]C[White 12 is a mistake.]N[mistake (b)];B[pg];W[qf];B[rf];W[qc];B[og];W[rc]))
(;B[lg]C[Black 11 is slack.]N[mistake (a)];W[nf])))
(;B[pd]N[(b)];W[od];B[oe]LB[pf:a][qe:b]C[Neither side can afford a mistake. White continues with 'a'. White 'b' is a mistake.]
(;W[pf]LB[of:a][ne:b]C[White 8 is the only move.

Black continues with 'a', not 'b'.]N[(a)]
(;B[of]C[Black 9 is the only move.]N[(a)];W[pg];B[og]LB[re:a][ph:b]C[White continues with 'a'. White 'b' is a mistake.]
(;W[re]LB[rd:a][pc:b]C[Black continues with 'a' or 'b'.]N[(a)]
(;B[rd]LB[pc:a][qb:b]C[White continues at 'a'. White 'b' is slack.]N[(a)]
(;W[pc]LB[qc:a][qb:b]C[Black continues with 'a'. Black 'b' is a mistake.]N[(a)]
(;B[qc]N[(a)];W[qb];B[rb];W[pa];B[rf];W[qe];B[se];W[ph];B[nd];W[sc];B[sd];W[ra];B[sb]
;W[nc];B[mc];W[rg];B[nb];W[ob];B[na];W[oa];B[lb];W[ne];B[md];W[qf];B[mf];W[sf]
;B[rc]C[The result in the corner is a seki. The result overall is considered slightly favorable to White.])
(;B[qb]C[Black 15 is a mistake.]N[mistake (b)];W[qc];B[rc];W[rb];B[sb];W[ra];B[qa];W[sd]C[White wins by throwing in at White 18 after Black captures.]))
(;W[qb]C[White 14 is a mistake. Black discards the corner for superior thickness.]N[mistake (b)];B[ph];W[rf];B[rb];W[qc];B[rc];W[ra];B[md]LB[pc:a][qh:b]C[White must play 'a', not another move (such as 'b').]
(;W[pc]N[(a)];B[oi])
(;W[qh]C[White 22 is a mistake.]N[mistake (b)];B[pc];W[pb];B[ob];W[nb];B[oa];W[na];B[nc];W[pa];B[ob];W[oa];B[nd]
;W[ob];B[mb])))
(;B[pc]N[(b)];W[md];B[ph];W[qh];B[qi];W[rd];B[ob];W[mc];B[qb];W[rh];B[ri];W[rg];B[rc]
;W[nb];B[oa];W[sb]LB[oh:a][sc:b]C[A tesuji by White, ensuring life for the group on the right side. Joseki continues with Black 'a'. Black 'b' doesn't work as a life threat against the White group.]
(;B[oh]C[Black does not need to answer, so reinforces at Black 29.]N[(a)])
(;B[sc]N[(b)];W[mf];B[oh];W[jc];B[sh];W[qe];B[sd];W[se];B[rb];W[sg])))
(;W[ph]C[White 12 is a mistake.]N[mistake (b)];B[nd];W[nc];B[mc];W[qb];B[rb];W[ne];B[md];W[oh];B[mf];W[ra]C[White sets up a ko he cannot win.];B[pb]
;W[pc];B[qc];W[pa];B[qa];W[ng];B[nf];W[qb];B[ob];W[nb];B[qa]))
(;B[ne]C[Black 9 is a mistake.]N[mistake (b)];W[pb];B[rf];W[md]LB[nd:a][mc:b]C[If Black 'a', White gives way with 'b'. Black has a difficult fight ahead.])
(;B[nd]C[Black 9 is a recent variation, whose outcome is not as favorable to Black as joseki (variation 2-1-5-2-2-1-1-1-1-1-1), as White gets better thickness to the right.

Black requires a favorable ladder to the lower left to play Black 9.

The sequence that follows is complex. A miscalculation on either side could have disasterous consequences.]N[not good (c)];W[nc];B[md];W[qb];B[rb];W[pb];B[rf];W[rg];B[re];W[ne];B[of];W[pg]
;B[rc];W[mc];B[ld];W[ng]C[White 24 would be played only if White did not have a favorable ladder to capture the two Black stones.];B[nf];W[mf];B[me];W[og];B[ne];W[lb];B[kb];W[la];B[jc]
;W[ra];B[sd];W[nb]))
(;W[qe]C[White 8 is unreasonable.]N[mistake (b)];B[re]LB[rf:a][rd:b]C[White may try 'a' or 'b'. Neither work.]
(;W[rf]N[(a)];B[rd])
(;W[rd]C[White 10 was played by Kitani Minoru (White) against Mukai Kazuo (Black) in April 1924.]N[(b)];B[rc];W[qc];B[sd];W[pc];B[rd];W[pg];B[ne];W[qg];B[rb];W[md];B[me]
;W[ld];B[nd];W[mc];B[nc];W[nb];B[ob]LB[lb:a][pb:b]C[White continues with 'a'. White 'b' is less favorable.]
(;W[lb]N[(a)];B[na];W[mb];B[pb])
(;W[pb]N[not good (b)];B[mb];W[oa]LB[kd:a][kb:b]C[Black continues with 'a' if the ladder is favorable, 'b' if not.]
(;B[kd]C[Black must have the ladder to play this way.]N[Black ladder (a)])
(;B[kb]N[(b)];W[le];B[mg];W[qa];B[jc]C[Black lets White live in the corner.];W[qb];B[rg]C[Black 37 to ensure life.

White has two floating groups to look after in the fighting ahead.]))))))
(;W[qc]N[shita tsuke (low attach) (c)];B[rc];W[pd]LB[qe:a][qb:b]C[Black continues with 'a' or 'b'.]
(;B[qe]N[(a)];W[qb];B[pg]LB[rb:a][qk:b][dp:c][nd:d]C[White continues with 'a' or 'b'. If Black 'a', White 'd' to make shape.

Playing elsewhere ('d'), gives Black an opportunity.]
(;W[rb]N[(a)])
(;W[qk]N[(b)];B[rb];W[nd])
(;W[]C[White plays elsewhere. 'a' and 'b' are miai.]N[White tenuki (c)]LB[nd:a][rb:b]
(;B[nd]C[Black emphasizes the center.]N[Black center (a)];W[pe];B[pf];W[rb]LB[oe:a][mf:b]C[If White 'a', Black 'b'.])
(;B[rb]N[Black territory (b)];W[nd])))
(;B[qb]LB[qe:a][pe:b]C[Black 7 is possible but drawing back at 'a' (variation 1) is more common with the low two-space pincer.

White continues with 'a' or 'b'.]N[(b)]
(;W[qe]N[(a)];B[pc];W[rd]LB[qc:a][od:b]C[Joseki continues with Black 'a'. Black 'b' is less favorable.]
(;B[qc]N[(a)];W[oe]LB[ob:a][nc:b][nb:c]C[Black will leave the corner. Playing Black 'a', White 'b', Black 'c' is too low ("the second line is the line of defeat").])
(;B[od]N[(b)];W[qc];B[pb];W[pe];B[nc];W[oe];B[nd];W[qi]LB[rb:a]C[White also has the cut at 'a' to look forward to.]))
(;W[pe]C[White must have the ladder to play this way.]N[White ladder (b)];B[pc];W[pb];B[qc];W[qf];B[ic];W[nd])))
(;W[qg]LB[pe:a][od:b]C[White must have the ladder to play this way. Black continues with 'a' or 'b'.]N[White ladder (d)]
(;B[pe]N[(a)];W[qj]LB[nd:a][pc:b]C[Black continues with 'a' or 'b'.]
(;B[nd]LB[qb:a][dp:b]C[Although the White stone is sealed in, it is not yet dead because White can play 'a'. The ensuing sequence will make Black thick, however, so timing is important. 

Variation 2 ('b') show White playing elsewhere.]N[(a)]
(;W[qb]LB[nc:a][rb:b][rc:c]C[Black continues with 'a' or 'b'. Black 'c' is a mistake.]N[(a)]
(;B[nc]LB[rc:a][ob:b]C[White continues with 'a' or 'b'.]N[(a)]
(;W[rc]N[(a)];B[ob];W[re])
(;W[ob]N[(b)];B[rc];W[rb];B[sb];W[od];B[oe];W[nb];B[mb];W[qc];B[re];W[pa]))
(;B[rb]N[(b)];W[rc]LB[pb:a][qc:b]C[Black continues with 'a'. Black 'b' is a mistake.]
(;B[pb]N[(a)];W[ra];B[sb];W[sc];B[pc];W[re])
(;B[qc]C[Black 11 is a mistake.]N[mistake (b)];W[ra];B[sb];W[sc];B[pb];W[sa];B[pc];W[rf]))
(;B[rc]C[Black 9 is a mistake. Black cannot capture White.]N[mistake (c)];W[mb];B[lb];W[od];B[oe];W[rb];B[sb];W[qc];B[re];W[nc];B[mc];W[ma]
))
(;W[]C[White plays elsewhere.]N[White tenuki (b)];B[rd]LB[pc:a][re:b]C[Black 8 is quite big. 'a' instead of 1 is solid but Black becomes over concentrated. Black 1 at 'b' has been seen.]))
(;B[pc]C[Black 7 is territory oriented.]N[(b)];W[pb];B[qb];W[of]LB[rc:a]C[White 10 works on a moyo. White 8 was a throw away, leaving 'a' as a peep.];B[nd]))
(;B[od]LB[pd:a][qj:b]C[White 'a' is joseki. White 'b' is disadvantageous.]N[(b)]
(;W[pd]LB[pe:a][pc:b]C[White must have the ladder. If so, Black plays 'a'. If White does not have the ladder, Black plays 'b'.]N[White ladder (a)]
(;B[pe]N[(a)];W[pc]LB[re:a][oe:b][qc:c]C[Black 'a' is tesuji (and joseki). Black 'b' and 'c' result in a loss.]
(;B[re]LB[mc:a][nd:b]C[White continues with 'a' or 'b'.]N[(a)]
(;W[mc]LB[ld:a][nd:b]C[Black continues with 'a' or 'b'.]N[(a)]
(;B[ld]LB[me:a][oe:b]C[White 'b' is joseki. White 'b' leads to difficulty.]N[(a)]
(;W[me]LB[qc:a][oe:b]C[Black continues with 'a' to establish a base. Black 'b' is heavy.]N[(a)]
(;B[qc]N[(a)];W[oe];B[of];W[nd];B[pf])
(;B[oe]C[Black 13 is heavy.]N[mistake (b)];W[md]))
(;W[oe]N[not good (b)];B[nd];W[md];B[ne];W[me];B[of]LB[mf:a][jd:b]C[White continues with 'a' or 'b'.]
(;W[mf]N[(a)];B[id])
(;W[jd]N[(b)];B[mf]C[Black discards the two stones.])))
(;B[nd]C[Black plays 11 if the ladder favors him.]N[Black ladder (b)];W[md];B[nc];W[nb];B[ob];W[lb];B[pb];W[mf]))
(;W[nd]C[White 10 is a fighting move.]N[atari: fight (b)];B[oe];W[ne];B[nf];W[ld];B[kd];W[le];B[mc];W[nc];B[qb];W[id]))
(;B[oe]C[Black 9 is a mistake.]N[mistake (b)];W[qe])
(;B[qc]C[Black 9 is a mistake.]N[mistake (c)];W[qe]))
(;B[pc]C[Black plays 7 if the ladder is not favorable to White. White is in serious trouble if White does not have the ladder.]N[no White ladder (b)];W[pe];B[qc]LB[nd:a]C[White plays 'a' if the ladder is favorable, in which case Black has made a mistake.];W[nd];B[ob]C[Black must play 11 if the ladder works for White, though the result favors white.];W[nc];B[nb]))
(;W[qj]C[White 6 is not recommended.]N[not good (b)];B[pc]C[Black has a better result locally.])))
(;W[nd]LB[pf:a][pc:b]C[Black continues with 'a' or 'b'.]N[kosumi (diagonal) (e)]
(;B[pf]N[(a)];W[qb];B[qj];W[dp]LB[me:a]C[White plays elsewhere.

Black may continue at 'a' to press White and build a moyo. The drawback is the at stones on the right becomes weakened.];B[me];W[ne];B[mf];W[nf];B[mg])
(;B[pc]N[(b)];W[pb];B[qb];W[pd];B[qc];W[pe];B[qf]))
(;W[me]LB[od:a][le:b][nd:c][pe:d]C[The gap at 'c' is intentional. Black playing there (variation 'c') is just what White wants.

Black continues with 'a' or 'b'.

Black 'c' and 'd' are not recommended.

d4, c3, b2, a1]N[hazama-tobi (1-space diagonal jump) (f)]
(;B[od]LB[mc:a][nd:b]C[White 'a' is joseki. White 'b' gives bad shape.]N[(a)]
(;W[mc]LB[pc:a][ld:b]C[Joseki continues with Black 'a'. Black 'b' is a potential mistake.]N[(a)]
(;B[pc]N[(a)];W[ld]LB[nc:a][kc:b]C[As for continuation, Black 'a' is recommended. Black cannot easily move out with 'b'.]
(;B[nc]N[(a)])
(;B[kc]N[not good (b)]C[Black 9 is not recommended.];W[id]))
(;B[ld]LB[pd:a][md:b]C[White continues with 'a' . White 'b' is a mistake.]N[not good (b)]
(;W[pd]N[(a)];B[pe];W[pc];B[oe];W[md];B[qc];W[jd];B[ke];W[mg])
(;W[md]C[White 8 is a mistake.]N[mistake (b)];B[pc];W[jd];B[ke]C[White's stones are weak all over.])))
(;W[nd]C[White 6 is a mistake.]N[mistake (b)];B[oe];W[pc];B[qc]CR[ne]LB[ld:a][nc:b]C[White 4 should be at the red dot.

Black now has an effective move at 'a', aiming at the cut at 'b'. White lacks a good continuation.]))
(;B[le]N[(b)];W[lf];B[ke];W[md];B[qg];W[ld];B[kd];W[kc];B[jc];W[kb];B[jb];W[lb];B[id]
)
(;B[nd]C[This is not joseki.]N[not good (c)];W[pe]LB[qe:a][ne:b][od:c]C[Black 'a' is better than 'b'. Black 'c' is foolishly suicidal.]
(;B[qe]N[(a)];W[pf];B[qg];W[ne])
(;B[ne]N[not as good (b)];W[pd];B[qe];W[qf];B[qc];W[pf])
(;B[od]N[mistake (c)]C[Black 7 is a mistake.];W[pd];B[pc];W[nc];B[md];W[qc];B[pb];W[qb]))
(;B[pe]C[Black 5 is slow.]N[kosumi: slow (d)];W[mc];B[ld];W[md];B[hc];W[qb]))
(;W[ld]LB[kd:a][mc:b][md:c]C[Black continues with 'a' if the top is favored, and yields a good result. Black 'b' is balanced. Black 'c' is also possible; Black should have the ladder to play 'c'.]N[ue tsuke (attach on top) (g)]
(;B[kd]C[White 4 is peculiar to the 2-space low pincer. As it has the drawback of an initial loss, it is seldom played.]N[(a)];W[mc];B[kc]LB[pf:a][pg:b][qg:c]C[White continues with 'a' or 'b'. White must have the ladder to play 'a'. White 'c' is an overplay.]
(;W[pf]LB[qf:a][pe:b][pc:c][od:d]C[Black continues with 'a' to 'c'. Black 'd' is bad style.]N[(a)]
(;B[qf]N[(a)];W[qg];B[pg];W[qe];B[rf];W[of];B[re];W[ph]C[White must have the ladder to play 16.];B[pb];W[og])
(;B[pe]N[(b)];W[oe];B[qf]LB[pd:a][pg:b]C[White continues with 'a', not 'b'.]
(;W[pd]N[(a)];B[qe];W[qc];B[rc];W[rb];B[pg];W[of]LB[rd:a][qb:b]C[Black continues with 'a'. Black 'b' is an overplay.]
(;B[rd]N[(a)])
(;B[qb]C[Black 19 is an overplay.]N[mistake (b)];W[pc];B[sb];W[qg];B[qh];W[rg];B[ra];W[qi]C[White 8 is a tesuji.];B[og];W[rh]))
(;W[pg]C[White 12 gives Black territory and White influence that is negated by the three Black stones on the side.]N[mistake (b)];B[qg];W[ph];B[qh];W[pi];B[qj]))
(;B[pc]N[(c)];AE[od][pa]W[oe];B[rf];W[qg];B[rg];W[qi])
(;B[od]C[Black 9 approaches an enemy concentration needlessly.]N[zoku-suji (bad style) (d)];W[pc];B[pd];W[nd]LB[le:a][qc:b]C['a' and 'b' are miai; either gives White good shape.]))
(;W[pg]N[(b)];B[pe];W[me];B[pc];W[ng]LB[rg:a]C[A followup Black move at 'a' is big.])
(;W[qg]N[(c)];B[pf]LB[qc:a][pg:b]C[White continues with 'a'. White 'b' splits White into two groups while Black solidifies.]
(;W[qc]LB[qf:a][rc:b]C[Black continues with 'a'. Black 'b' is not recommended.]N[(a)]
(;B[qf]N[(a)];W[pd];B[re];W[rd];B[sd];W[qe];B[rg])
(;B[rc]C[Black 11 is not recommended.]N[not good (b)];W[pd];B[qe];W[pg];B[of];W[le]LB[qb:a]C[If Black plays 'a', White fights the ko.]))
(;W[pg]N[mistake (b)];B[of]LB[le:a][qf:b]C[White may try 'a' or 'b'.]
(;W[le]N[(a)];B[pc];W[od];B[qf])
(;W[qf]N[(b)];B[od];W[pc];B[pd];W[md];B[qc];W[lf];B[og]))))
(;B[mc]N[(b)];W[oe]LB[pf:a][kd:b]C[Black continues with 'a'. Black 'b' is playable only if it works well with the top-left, as the top-right corner and right side suffers.]
(;B[pf]N[(a)];W[kd])
(;B[kd]N[(b)];W[qf]))
(;B[md]C[Black 5 leads to the same variations as the high one-space pincer. Refer to 2-1-7-4-2.]N[(c)];W[mc];B[nc];W[mb];B[me];W[nd];B[ne];W[nb];B[pe];W[kd];B[qj]))
(;W[]C[White plays elsewhere. White must have the ladder to play this way. Black continues with 'a' or 'b'.]N[White tenuki (h)]LB[od:a][pc:b]
(;B[od]LB[pd:a][nd:b][pc:c]C[White continues with 'a' if the ladder is favorable, or 'b' if not. White 'c', avoiding the ladder, gives black magnificant thickness.]N[(a)]
(;W[pd]N[(a)];B[pe];W[pc];B[nd];W[qc];B[re]LB[rb:a][nc:b]C[White continues with 'a'. White 'b' is the older form of this joseki, and can lead to less favorable results.]
(;W[rb]N[(a)])
(;W[nc]LB[mc:a][md:b][rc:c]C[Black continues with 'a' to 'c'. The difference between 'a' and 'b' is the possibility of cutting points.]N[(b)]
(;B[mc]N[(a)];W[rc])
(;B[md]N[(b)];W[rd]C[White 14 lets White live in sente. Since he cannot cut (because of Black 13), making Black solid outside with White 14 does not matter.];B[qe])
(;B[rc]C[Black 14 forces White low.]N[(c)];W[mc];B[md];W[lb];B[kc];W[kb];B[jc])))
(;W[nd]N[(b)];B[nc]LB[mc:a][pd:b]C[White continues with 'a'. White 'b' is a vulgar mistake.]
(;W[mc]N[(a)];B[nb];W[pd];B[oe];W[pe];B[pc];W[of]LB[ne:a][ob:b]C[Black continues with 'a' or 'b'.]
(;B[ne]N[(a)];W[qc];B[ob];W[qe];B[pf];W[rd];B[pg];W[rg])
(;B[ob]N[(b)];W[ne];B[oc];W[nf];B[pf];W[pg];B[qf];W[qg];B[rf]))
(;W[pd]C[White 8 is a mistake.]N[mistake (b)];B[oe];W[pc];B[pe];W[nb];B[mc]LB[qc:a][qe:b]C[White continues with 'a'. White 'b' is unreasonable.]
(;W[qc]N[(a)];B[re];W[rd];B[qe])
(;W[qe]C[White 14 doesn't work.]N[mistake (b)];B[qc])))
(;W[pc]C[White 6 give Black great thickness.]N[(c)];B[pd];W[mc];B[md];W[nc];B[ld];W[qc];B[rd];W[rc];B[qj]))
(;B[pc]N[(b)];W[od];B[pf]LB[me:a][le:b]C[White continues with 'a'. White 'b' is less favorable.]
(;W[me]N[(a)];B[le];W[lf];B[ke];W[md]LB[ph:a][ic:b]C[Black continues with 'a', or if the ladder is favorable off 'a', Black may continue with 'b'.]
(;B[ph]N[(a)];W[ld];B[kd];W[kc];B[jc];W[kb];B[jb];W[lb];B[kf])
(;B[ic]C[Black must have the ladder off Black 7 to play this way.]N[Black ladder (b)];W[qe]LB[pe:a][qf:b]C[Black continues with 'a' only with a favorable ladder, otherwise Black must play 'b'.]
(;B[pe]C[Black must have the ladder to play this way.]N[Black ladder (a)];W[pd]LB[qc:a][qf:b]C[Black continues with 'a'. Black 'b' is a mistake.]
(;B[qc]N[(a)];W[qf];B[pg];W[qg];B[qh];W[rh];B[ri]LB[qi:a][ph:b]C[White 'a' and Black captures the three White stones on the right. White 'b' is a disaster for Black if Black does not have the ladder.]
(;W[qi]N[(a)];B[ph];W[rj];B[rg];W[si];B[re])
(;W[ph]N[(b)];B[qi];W[og];B[oh];W[pi];B[of];W[ng];B[nf];W[mf];B[nh];W[mg];B[pj]))
(;B[qf]C[Black 17 is a mistake.]N[mistake (b)];W[qc]))
(;B[qf]N[(b)];W[pe];B[re];W[rf];B[rd];W[of];B[rg];W[pg];B[qg];W[ph])))
(;W[le]LB[qe:a]C[White cannot aim at 'a' by playing the capping play of White 8.]N[(b)];B[jd];W[qe]C[White 10 does not work. The sequence that follows shows why.];B[pe];W[pd];B[qc];W[qf];B[ne]C[Black 15 is sente, so Black can continue with ni-dan bane (2 step hane).];W[md]C[White must play 16 to stay connected.];B[qg]
;W[rg];B[rh])))
(;W[oe]C[White 4 is not joseki with the two-space low pincer.]N[ikken tobi (1-space jump) (i)];B[pf];W[ic];B[le];W[of]C[White is pushing Black from behind, which is hopeless.];B[pg]))
(;B[kc]LB[qc:a][pd:b][pe:c][of:d][pf:e][qg:f][ic:g][dp:h][ke:i]N[sangen basami (3-space low pincer) (f)]C[Black 1 is a pincer play said to have been developed by the 4th Honinbo Dosaku (1645-1702). This move maintains overall balance while attacking the White kakari stone. It is often used when there is a White stone on the top-left star-point.

White's responses range from 'a' to g', and include playing elsewhere (h8).

White may need the ladder to play 'c'.

White reply at 'i' comes from a 19th century Japanese game.

i9, h8, g7, f6, e5, d4, c3, b2, a1

outcomes:
a1, b2, d4 - Black choice
c3 - White choice
e5 - Taisha
f6 - Black top, White right
g7 - White far top, right; Black corner, near right
h8 - White top]
(;W[qc]N[(a)];B[rc];W[pd]LB[qe:a][qb:b]C[Black continues with 'a' or 'b'.]
(;B[qe]N[(a)];W[qb]LB[pg:a][qh:b]C[Black continues with 'a' or 'b'.]
(;B[pg]N[(a)])
(;B[qh]N[(b)];W[pe];B[pf];W[of];B[pg]))
(;B[qb]N[(b)];W[qe];B[pc];W[rd];B[qc];W[oe];B[]C[Black plays elsewhere.];W[nb]LB[ob:a]C[White 13 is better than White 'a'. This forces Black to capture White 10.];B[re];W[rf];B[sd]
;W[qf]))
(;W[pd]LB[qe:a][qc:b]C[Black continues with 'a' or 'b'.

a1 - Black right, White corner
b2 - Black top, White big corner]N[(b)]
(;B[qe]N[(a)];W[qc];B[rc];W[qb];B[pg])
(;B[qc]N[(b)];W[qe]LB[pe:a][re:b]C[Black continues with 'a'. Black 'b' is a mistake.]
(;B[pe]N[(a)];W[re];B[oe];W[pc];B[qb];W[rd];B[nc];W[nb];B[mc];W[pb]C[The two-space high pincer also has this variation; refer to that joseki.])
(;B[re]C[Black 7 is weak.]N[not good (b)];W[rf];B[qf];W[pe]LB[rg:a][rd:b]C[Black must play 'a'. Black 'b' is unreasonable regardless of the ladder.]
(;B[rg]N[(a)];W[rd];B[sf];W[rc])
(;B[rd]C[Black 11 is unreasonable.]N[mistake (b)];W[rg]C[Black must play to live in the corner, allowing White to capture Black 9 and gaining great position.]))))
(;W[pe]LB[qe:a][pd:b][qj:c]C[White may need the ladder to play this way.

Black continues with 'a'. 

Black 'b' is not recommended unless cirucumstances favor it, the variation shown in 'c'.]N[White ladder (c)]
(;B[qe]C[White continues with 'a' or 'b'.]LB[pf:a][qc:b]N[(a)]
(;W[pf]N[(a)];B[qg];W[ic];B[ke];W[qc]LB[pg:a][rc:b]C[White must have the ladder to play 1.

Black continues at 'a'. Black 'b' is a mistake.]
(;B[pg]N[(b)];W[pd];B[ng];W[qf];B[rf];W[rc])
(;B[rc]C[Black 11 is a mistake.]N[mistake (b)];W[qf];B[rf];W[rg];B[re];W[qh]))
(;W[qc]LB[rc:a][pf:b][pd:c]C[Black continues with 'a' or 'b'. Black 'c' is a mistake.]N[(b)]
(;B[rc]N[(a)];W[pf];B[pd];W[od];B[pc];W[nf];B[hc])
(;B[pf]LB[pd:a][pc:b]C[White continues at 'a'. White 'b' is safe and weak.]N[(b)]
(;W[pd]LB[qg:a][rc:b]C[Black continues with 'a'. Black 'b' leads to a fight Black may not like.]N[(a)]
(;B[qg]N[(a)];W[rf];B[qf];W[rc];B[qj])
(;B[rc]C[Black 9 is a tough move that may be an overplay.]N[(b)];W[qf];B[qb];W[pc];B[re];W[rf];B[se];W[qh];B[of];W[ld]))
(;W[pc]C[White 8 is too weak.]N[(b)];B[qi]))
(;B[pd]C[ Black 7 is a mistake.]N[mistake (c)];W[pc];B[od];W[nd];B[ne];W[md])))
(;B[pd]C[Black 5 is inconsistent with the leisurely distance of the pincer. White should not have a problem settling himself.]N[(b)];W[od];B[oe];W[pf];B[ne];W[qb];B[rf])
(;B[qj]LB[pd:a]C[Black may push through with 'a' if he has support such as at Black 5.]N[(c)];W[pi]LB[pd:a]C[The shoulder hit at White 6 is helpful if Black pushes through and cuts at 'a'.];B[pd];W[od];B[oe];W[pf];B[ne];W[qb];B[rf]
))
(;W[of]C[Black continues with 'a' to 'c'.]LB[qg:a][oe:b][hc:c]N[(d)]
(;B[qg]N[(a)];W[ic]LB[ke:a][mc:b]C[Black continues with 'a' or 'b'.]
(;B[ke]N[(a)];W[ie];B[kg]LB[qc:a][ig:b]C[White continues with 'a' or 'b'.]
(;W[qc]N[(a)];B[rc]LB[pd:a][rd:b]C[White continues with 'a'. White 'b' is not recommended.]
(;W[pd]LB[qe:a][qb:b]C[Black continues with 'a' or 'b'.]N[(a)]
(;B[qe]N[(a)];W[qb])
(;B[qb]N[(b)];W[qe];B[pc];W[rd];B[qc];W[qf];B[od];W[nd];B[pe];W[pf];B[ne];W[qi]))
(;W[rd]LB[qe:a][re:b]C[White 12 is selfish. Black plays 'a' while White hopes for 'b'.]N[not good (b)]
(;B[qe]N[(a)];W[rb];B[pc];W[qb];B[od];W[pb];B[nd];W[pd];B[pe])
(;B[re]C[Black 13 is a mistake.]N[mistake (b)];W[pd];B[qe];W[rb])))
(;W[ig]N[(b)];B[pc]C[White continues with 'a' or 'b'.]LB[od:a][pe:b]
(;W[od]N[(a)];B[pe];W[oe];B[ph];W[mh];B[ki];W[oh];B[pj])
(;W[pe]N[(b)];B[qe];W[pb]LB[qb:a][nc:b]C[Black continues with 'a' or 'b'.]
(;B[qb]N[(a)];W[pd];B[qc];W[mc])
(;B[nc]N[(b)];W[qc];B[pd];W[od];B[nb];W[ob];B[qb];W[oh]))))
(;B[mc]LB[qc:a][pd:b]C[White continues with 'a' or 'b'.]N[(b)]
(;W[qc]N[(a)];B[rc];W[pd];B[qb];W[qe];B[pc];W[rd];B[qc];W[qf];B[od];W[nd];B[pe];W[pf]
;B[nc];W[qi])
(;W[pd]N[(b)];B[qc];W[qe];B[re];W[rf];B[qf];W[pe];B[rd];W[oh])))
(;B[oe]N[(b)];W[ne];B[pe]C[White continues with 'a' or 'b'.]LB[nd:a][lc:b]
(;W[nd]N[(a)];B[nf];W[og]LB[mf:a][ng:b]C[Black continues with 'a' or 'b'.]
(;B[mf]N[(a)];W[ld])
(;B[ng]N[(b)];W[oh];B[nh];W[qf];B[pf];W[qg];B[qe];W[pg];B[pc];W[le]))
(;W[lc]LB[nf:a][kd:b]C[Black continues with 'a' or 'b'.]N[(b)]
(;B[nf]N[(a)];W[kd];B[og];W[jc])
(;B[kd]N[(b)];W[nf]LB[qg:a][lb:b]C[Black continues with 'a' or 'b'.]
(;B[qg]N[(a)];W[lb])
(;B[lb]N[(b)];W[mc];B[qg];W[hd]))))
(;B[hc]N[(c)];W[qf]LB[pc:a][dp:b]C[Black continues at 'a'.

Even if Black plays elsewhere ('b'), the 3-4 stone retains aji.]
(;B[pc]N[(a)];W[od];B[ob];W[nb];B[pb])
(;B[dp]N[(b)];W[qc];B[pc]LB[pb:a][pd:b]C[White continues with 'a'. White 'b' fails.]
(;W[pb]N[(a)];B[pd];W[qb];B[od]C[Black escapes.];W[nc];B[nd];W[md]LB[me:a][ne:b]C[Black continues with 'a'. Black 'b' is not recommended.]
(;B[me]LB[lc:a][ne:b]C[White continues with 'a'. White 'b' is not recommended.]N[(a)]
(;W[lc]N[(a)];B[nf];W[kd])
(;W[ne]C[White 18 starts a fight White is likely to lose.]N[(b)];B[mc];W[ld];B[mb]))
(;B[ne]C[Black 17 is not recommended.]N[not good (b)];W[mc];B[pg];W[pf];B[nf];W[og];B[le]))
(;W[pd]C[White 10 is a mistake.]N[(b)];B[pb];W[qb];B[od];W[pe];B[ob];W[nc];B[nb]LB[mc:a][rd:b]C[White 'a' and Black captures the corner with 'b'. White 'b' and Black captures two White stones (2 & 16).]
(;W[mc]N[(a)];B[rd])
(;W[rd]N[(b)];B[nd])))))
(;W[pf]C[White 4 introduces the taisha, but there are not as many variations as with the 5-3 point.]N[taisha (e)];B[od]LB[pd:a][nd:b]C[White continues with 'a' or 'b'. White can only play 'b' with a favorable ladder.]
(;W[pd]N[(b)];B[pe];W[pc];B[qe];W[oe];B[nd];W[qc]LB[qf:a][rc:b][re:c]C[Black continues with 'a' to 'c'.

c3, b2, a1]
(;B[qf]N[(a)];W[of];B[qh]LB[mb:a][mc:b]C[White continues with 'a', or if the ladder is favorable, may play 'b'.]
(;W[mb]N[(a)];B[ld]C[

];W[oh];B[pj];W[lg];B[je])
(;W[mc]C[White must have the ladder to play this way.]N[White ladder (b)];B[md];W[ld]LB[lc:a][nc:b]C[Black continues with 'a'. Black 'b' falls into a trap.]
(;B[lc]N[(a)];W[nc]LB[le:a]C[Black must not be able to capture White 18 by playing 'a' for White to play this way.])
(;B[nc]C[Black 19 is a mistake.]N[mistake (b)];W[nb];B[mb];W[lc];B[ob];W[na]LB[ma:a][me:b]C[Black may try 'a' or 'b'. Both fail, though 'b' may be preferable.]
(;B[ma]N[(a)];W[me];B[oa];W[nb];B[na];W[ne];B[nb];W[lb];B[rc];W[qb];B[rb];W[pa])
(;B[me]N[(b)];W[lb];B[rc];W[pb]))))
(;B[rc]N[(b)];W[rb];B[qg];W[mb];B[ld];W[of];B[rd]LB[ph:a][qi:b]C[Joseki continues with White 'a'.

White 'b' was played by Akaboshi Intetsu in 1835 against Honinbo Jowa. This game was nicknamed "Intetsu's blood-vomiting game", because of a stomach hemorrhage Intetsu had (and died of a month later).]
(;W[ph]N[(a)];B[qh];W[pi];B[rj];W[lg];B[je])
(;W[qi]C[White 18 is not joseki; Black gains a favorable position.];B[ph];W[pi];B[oh];W[mf];B[qb]LB[pb:a][qa:b]C[Black 6 is a clever move. White continues with 'a'. White 'b' is less favorable. ]
(;W[pb]N[(a)];B[ra]LB[nc:a][sb:b]C[White continues with 'a'. White 'b' gives a flower-viewing ko (nothing to lose), inviting defeat.]
(;W[nc]N[(a)];B[me];W[sb];B[lf];W[mg];B[lg];W[mh];B[oi];W[lh];B[pk])
(;W[sb]C[White 28 is premature, and a mistake.]N[mistake (b)];B[nc];W[nb];B[pa]))
(;W[qa]C[White 26 eliminates ko potential, but at a cost.]N[(b)];B[sb];W[ra];B[nb];W[nc];B[mc];W[ob];B[lb];W[na])))
(;B[re]LB[mb:a][rc:b]C[White continues with 'a'. White 'b' is less favorable.]N[(c)];W[mb];B[md];W[nf];B[rc];W[rb];B[sb];W[ra];B[qh]LB[mc:a][lf:b]C[White continues with 'a'. White 'b' and White suffers a squeeze in sente on the corner stones.]

(;W[mc]N[(a)];B[le];W[lg])
(;W[lf]C[White 22 is a mistake.]N[mistake (b)];B[qb];W[pb];B[nb];W[nc];B[mc];W[lb];B[pa];W[qa];B[oa];W[ma];B[kb]
;W[na])))
(;W[nd]C[White must have the ladder to play 6.]N[White ladder (b)];B[oe];W[pc]LB[qe:a][qc:b][of:c]C[Black continues with 'a' if the ladder is unfavorable (Black 5 & 7 can be captured in a ladder), or 'b' if the ladder works for Black. White should not have played White 6 if the ladder works for Black.

Black 'c'  was played by Hashimoto Utaro against Kajiwara in 1974.]
(;B[qe]N[(a)];W[qc];B[qi])
(;B[qc]N[(b)];W[pd];B[pe];W[qe];B[qf];W[re];B[rf];W[of])
(;B[of]LB[qc:a][pg:b][pd:c]C[White continues with 'a'. White 'b' and 'c' are unreasonable.]
(;W[qc]N[(a)];B[re]LB[rd:a][rc:b]C[White continues with 'a', which is better than White 'b'.]
(;W[rd]N[(a)];B[qe];W[mc])
(;W[rc]LB[nc:a]C[Black can aim at the cutting point of 'a' later if the ladder favors him.]N[(b)]))
(;W[pg]N[(b)];B[qc]C[White cannot push through and cut as the ladder no longer exists.])
(;W[pd]C[White 10 is unreasonable.]N[mistake (c)];B[pe];W[qe];B[qf];W[re]LB[nc:a][pg:b]C[Black continues with 'a'. Black 'b' is a mistake.]
(;B[nc]LB[rd:a][qc:b]C[White continues with 'a', not 'b'.]N[(a)]
(;W[rd]N[(a)];B[pb]C[Black 17 is a tesuji.];W[qc];B[pg];W[mc];B[nb];W[mb];B[md];W[ne];B[ob])
(;W[qc]C[White 16 is a mistake.]N[mistake (b)];B[rf];W[rd];B[pg];W[mc];B[nb];W[mb];B[md];W[ne];B[mf]))
(;B[pg]C[Black 15 is a mistake.]N[mistake (b)];W[rd])))))
(;W[qg]N[niken-basami (2-space pincer) (f)];B[pe];W[qj]C[Black continues with 'a' or 'b'.]LB[nd:a][pc:b]
(;B[nd]N[(a)];W[mc]C[Black continues with 'a' to 'c'.]LB[nc:a][md:b][ld:c]
(;B[nc]N[(a)];W[nb];B[md];W[lc];B[ld];W[kb];B[jb];W[jc];B[kd];W[lb];B[ic]C[Black needs the ladder.];W[qb]
;B[pc];W[pb];B[od]LB[ob:a][rc:b]C[White continues with 'a'. White 'b' is a mistake.]
(;W[ob]N[(a)];B[jd])
(;W[rc]C[White 24 is a mistake.]N[mistake (b)];B[ob];W[oa];B[ma];W[na];B[ka];W[mb]LB[jd:a][hb:b]C[If White now plays 'a', Black can play 'b'.]))
(;B[md]N[(b)];W[lc]LB[ld:a][kd:b]C[Black continues with 'a'. Black 'b' is an overplay.]
(;B[ld]N[(a)];W[kb]LB[jb:a][jc:b]C[Black continues with 'a'. Black 'b' is weak.]
(;B[jb]N[(a)];W[jc];B[kd]LB[ib:a][lb:b]C[White continues with 'a'. White 'b' is less favorable.]
(;W[ib]N[(a)];B[nc])
(;W[lb]N[(b)];B[ic];W[qb];B[rb]LB[qc:a][pb:b]C[White 'a' is better than White 'b'.]
(;W[qc]N[(a)];B[rc];W[re];B[rd];W[pc]LB[nc:a][nb:b][qa:c]C[If the Black 'a', White 'b' exchange had been made, White 24 would not be necessary. As it is, without White 24, Black 'c' kills the White group.])
(;W[pb]N[(b)];B[qc]LB[nc:a][dp:b]C[White must play 'a'. White cannot afford to play elsewhere ('b').]
(;W[nc]N[(a)])
(;W[]C[White plays elsewhere, and will be killed for it.]N[White tenuki: mistake (b)];B[nb];W[nc];B[ka];W[la];B[oa]))))
(;B[jc]C[Black 13 is weak.]N[mistake (b)];W[jb];B[ic];W[pb]))
(;B[kd]C[Black 11 is an overplay.]N[mistake (b)];W[kb];B[jb];W[ld];B[le];W[ke];B[lf];W[lb];B[id];W[qc];B[rc];W[pc]
;B[re]LB[oe:a]C[Black must play 23 to defend against White 'a'.]))
(;B[ld]N[(c)];W[qb];B[rb];W[kb];B[jb]LB[md:a][lb:b]C[White continues with 'a'. White 'b' is premature, and leads to ko.]
(;W[md]N[(a)];B[me];W[lb];B[jc];W[qc];B[rc];W[pc];B[ne]C[The joseki ends.];W[]C[White plays elsewhere.]N[White tenuki];B[nc];W[nb];B[ka]LB[ma:a][la:b]C[White continues with 'a'. White 'b' is a deadly mistake.]

(;W[ma]N[(a)];B[lc];W[oa])
(;W[la]C[White 25 is a mistake.]N[mistake (b)];B[oa];W[pa];B[ob];W[na];B[mb]))
(;W[lb]C[White 14 is a mistake.]N[mistake (b)];B[md]C[White must add a stone.];W[]N[White tenuki: mistake]C[White plays elsewhere, a mistake.];B[nc];W[nb];B[ka];W[ma];B[lc];W[oa];B[mb]C[White must fight the ko for life.])))
(;B[pc]LB[pb:a][ld:b][od:c]C[White continues with 'a' or 'b'. White 'c' is heavy.]N[(b)]
(;W[pb]N[(a)];B[qb];W[of];B[nd])
(;W[ld]N[(b)];B[kd];W[le];B[ke];W[lf];B[jg];W[lh])
(;W[od]C[White 8 is heavy.]N[not good (c)];B[md];W[oe];B[pf];W[nf];B[pg])))
(;W[ic]LB[pf:a][pe:b]C[White 4 may be appropriate when White has support at top left.

Black continues with 'a'. Black 'b' is slow.]N[top pincer (g)]
(;B[pf]N[(a)];W[qc];B[rc];W[pd];B[qb];W[qe];B[pc];W[rd];B[qc];W[pe];B[od]LB[of:a][oe:b]C[White continues with 'a' or 'b', 'a' if the ladder is favorable, 'b' if not.]

(;W[of]LB[oe:a][nd:b]C[White must have the ladder from Black 15 (at 'b') to play this way.

Black continues with 'a'. Black 'b' is weak.]N[White ladder (a)]
(;B[oe]N[(a)];W[qf];B[pg];W[og];B[oh];W[nh]LB[nf:a][md:b][ng:c]C[Black continues with 'a'. Black 'b' is a mistake. 

Black 'c' gives White superior thickness for 20 points of Black territory.]
(;B[nf]N[(a)];W[ng];B[mi];W[mf];B[nc];W[nd];B[ob];W[ne];B[oc];W[oi];B[ph];W[pi];B[rg]
;W[rh];B[qg];W[ni]C[The result slightly favors Black.])
(;B[md]C[Black 23, trying to block White's ladder, is a mistake.]N[mistake (b)];W[ph];B[qg];W[rg];B[qh];W[qi];B[pi];W[rh])
(;B[ng]C[Black 23 gives Black about 20 points of territory, but White has superior thickness.]N[not good (c)];W[nf];B[mf];W[mg];B[ne];W[ng];B[qg];W[rg];B[rh];W[me];B[nd];W[mc]
;B[nc];W[nb];B[ob];W[md];B[oc];W[oi];B[qh];W[lf]))
(;B[nd]C[Black 17 is submissive, and give White good shape.]N[mistake (b)];W[pg];B[ld]))
(;W[oe]C[White 16 if ladders are unfavorable.]N[Black ladder (b)];B[nd]C[White continues with 'a' or 'b'.]LB[of:a][ld:b]
(;W[of]N[(a)];B[ld])
(;W[ld]C[White 18 is a preference in style compared to the previous variation. White 18 is intended to annoy and for later aji.]N[(b)];B[ne];W[of];B[kd])))
(;B[pe]C[Black 5 was popular around 1800, when Genjo and Chitoku were playing. It is a slow way of playing.]N[slow (b)];W[nd];B[ke];W[ld];B[kd];W[qb]))
(;W[]C[White plays elsewhere.]N[White tenuki (h)];B[pc];W[od];B[pf]LB[le:a][ke:b][ld:c]C[White continues with 'a' or 'b'. White 'c' is not recommended.]
(;W[le]C[Black continues with 'a' to 'c'.]LB[jd:a][ke:b][hc:c]N[(a)]
(;B[jd]N[(a)];W[jf];B[ph])
(;B[ke]N[(b)];W[kf];B[je];W[ld];B[lc];W[mc];B[hc];W[lg];B[ph])
(;B[hc]N[(c)];W[id];B[ic];W[lc];B[lb];W[kd];B[jc];W[mc];B[ph]))
(;W[ke]LB[le:a][id:b]C[Black continues with 'a' or 'b'.]N[(b)]
(;B[le]N[(a)];W[lf];B[me];W[of];B[kf];W[pg];B[qf];W[qg];B[je];W[pd];B[qc];W[rf];B[re]
;W[qe];B[pe];W[oe];B[qe];W[nh])
(;B[id]N[(b)];W[lc]LB[ld:a][lb:b]C[Black starts a fight with 'a'. Black 'b' is too mild.]
(;B[ld]LB[pd:a][kd:b]C[Black starts a fight with 11.

White continues with 'a'. White 'b' is a mistake.]N[(a)]
(;W[pd]C[Black continues with 'a' or 'b'.]LB[qe:a][qc:b]N[(a)]
(;B[qe]LB[qc:a][kd:b]C[White continues with 'a'. White 'b' is a mistake.]N[(a)]
(;W[qc]N[(a)];B[rc];W[pb];B[mc];W[rb])
(;W[kd]C[White 14 is a mistake.]N[mistake (b)];B[mc];W[lb];B[mb];W[md];B[le];W[kb];B[jc];W[jb];B[ib];W[nb];B[me]
;W[nd];B[pb];W[of];B[kf];W[og];B[qh]))
(;B[qc]N[(b)];W[kd];B[mc];W[lb];B[mb]LB[md:a][kb:b]C[White continues with 'a'. White 'b' is a mistake.]
(;W[md]N[(a)];B[le];W[kb];B[jc];W[jb];B[ib];W[nb];B[me];W[nd];B[nf];W[pb];B[qb];W[pa]
;B[qg]LB[qe:a]C[Black 31, to prevent White 'a', cannot be omitted.];W[jf])
(;W[kb]C[White 18 is a mistake.]N[mistake (b)];B[me];W[jc];B[nf])))
(;W[kd]C[White 12 is a mistake.]N[mistake (b)];B[mc];W[lb];B[mb];W[md];B[le];W[kb];B[jc];W[jb];B[ib];W[nb];B[me]
;W[nd];B[nf];W[pd];B[qe];W[qc];B[rc];W[pb];B[kf]))
(;B[lb]C[Black 11 is too mild.]N[not good (b)];W[ld]LB[jb:a][ph:b]C[Black 'a' is honte (proper), but gives White a start on a favorable fight. Black 'b' gives White Black 11. Thus Black 11 is bad.]
(;B[jb]N[(a)];W[qe]LB[pe:a][qf:b]C[White provokes a fight with 14.
Black continues with 'a'. Black 'b' is unbearably submissive.]
(;B[pe]N[(a)];W[pd]LB[qc:a][qf:b]C[Black continues with 'a'. Black 'b' gives up too much.]
(;B[qc]N[(a)];W[qf]C[A fight where Black's prospects are not great.])
(;B[qf]C[Black 17 is bad.]N[mistake (b)];W[qc];B[re];W[rc]))
(;B[qf]N[(b)];W[pe];B[re]LB[rf:a][rd:b]C[White continues with 'a' or 'b'.]))
(;B[ph]N[(b)];W[jc];B[jd];W[kb];B[kd];W[ib]))))
(;W[ld]C[White 8 does not work well.]N[not good (c)];B[kd];W[le];B[ke];W[lf]LB[gc:a][jg:b]C[Black continues with 'a' or 'b'.];B[gc];W[qe];B[qf];W[pe];B[re]
;W[rf]LB[rd:a][rg:b]C[Black continues with 'a' to keep the corner or 'b' to emphasize the side.]
(;B[rd]N[(a)];W[of];B[rg])
(;B[rg]N[(b)];W[rd];B[sf];W[qc]LB[ph:a][pi:b][oh:c]C[Black extends somewhere around 'a' to 'c'.])))
(;W[ke]C[White 4 was played in an 1822 game between Honinbo Jowa (White) and Toyama Sansetsu (Black).
]AB[dc][dq][cp][bq][cr][do][fo][fn]AW[fm][gn][go][fp][ep][eq][pq]N[(i)];B[je]
;W[jf];B[jd];W[if];B[he];W[pe];B[qe];W[pg];B[pf];W[of];B[qf];W[qh]C[White 16 is usually unreasonable, as Black can cut, but White's thickness in the center (White 4, 6, 8, and stones on the lower left) makes it possible in this instance.];B[pc]C[Black 17 is necessary to live in the corner.]
;W[pn]C[White starts a moyo, revealing the logic for White 16.];B[kq];W[mq];B[hq];W[dl];B[dm];W[em];B[dn];W[ip];B[mr];W[iq];B[nq];W[no]
;B[mp];W[ln];B[pr];W[mf];B[hf];W[de];B[ce];W[cf];B[cd];W[hg];B[gg];W[hh];B[gh]
;W[gi];B[eh];W[ci];B[qq];W[dg];B[ef];W[eg];B[ff];W[df];B[fi];W[ec];B[ed];W[dd]
;B[cc];W[ee];B[fd];W[fe];B[ge];W[gd];B[fc];W[ie];B[hd];W[gc];B[eb];W[id];B[hc]
;W[ic];B[ib];W[gj];B[rn];W[ro];B[qi];W[pi];B[qj];W[rh];B[qn];W[qo];B[pm];W[pp]
;B[on];W[po];B[om];W[ql];B[rl];W[or];B[oo];W[qr];B[pj];W[np];B[nr];W[op];B[jr]
;W[ir];B[lp];W[oi];B[pl];W[ob];B[od];W[mc];B[pb]C[Move 103 in the diagram (actual move: 119) was the last move of the game. This game is known as "the eternally unfinished game".]))
(;B[md]LB[oe:a][ne:b][qc:c][mc:d][pe:e][dp:f]C[Black 3 is typical of the severity of modern Go. White cannot afford to play elsewhere ('f'). Responses range from 'a' to 'd'. White 'e' is a trick play, not joseki.

f6, e5, d4, c3, b2, a1]N[ikken takabasmi (1-space high pincer) (g)]
(;W[oe]N[(a)];B[pf]LB[kd:a][ph:b][me:c]C[White continues with 'a' to 'c'.  White 'b' does not work very well with the high pincer, so is not recommended.]
(;W[kd]N[(a)];B[mf]LB[mc:a][of:b]C[White continues with 'a'. White 'b' is bad, as it gives Black solidity on the fourth line.]
(;W[mc]N[(a)];B[nd];W[nc];B[od]LB[pc:a][pd:b]C[Joseki continues with White 'a'. White 'b' is unreasonable resistance.]
(;W[pc]LB[pd:a][qc:b]CR[lc]C[Black continues with 'a' or 'b'.  Black 'a' as joseki is recent. Black 'b' is the old pattern - Black takes more area,  but may end in gote and loses the hane at the red dot.]N[(a)]
(;B[pd]N[(a)])
(;B[qc]N[(b)];W[pd];B[pe];W[ld];B[of]))
(;W[pd]LB[pc:a][pe:b]C[Black 'a' is best, as White 12 is unreasonable. If Black 'b', White 'a', and the old joseki pattern of 2-1-7-1-1-2 results.]N[(b)];B[pc];W[pe];B[qe];W[of];B[og]LB[qf:a][qc:b]C[White may try 'a' or 'b'. Neither are favorable for White.]
(;W[qf]N[(a)];B[nf];W[pg];B[ne];W[pf];B[qc]LB[lc:a][ph:b]C['a' and 'b' are miai.])
(;W[qc]N[(b)];B[pb];W[qf];B[nf];W[pg];B[ne];W[pf];B[rc];W[ld];B[ph];W[oh];B[ng];W[qh]
;B[pi];W[re];B[rd];W[rg];B[se];W[rf];B[ri];W[qi];B[qj];W[pj];B[oi];W[rj];B[qk]
;W[rh];B[rk];W[si];B[nh]C[White is sealed in.])))
(;W[of]C[White 8 is a mistake.]N[mistake (b)];B[pg]LB[mc:a][og:b][ph:c]C[White has lost the connection under at 'a', and is at a loss for a good move. A White push at 'b' and Black replies with 'c', increasing White's loss.]))
(;W[ph]LB[of:a][pg:b]C[Black continues with 'a' or 'b'. Black 'a' is better. ]N[(b)]
(;B[of]N[(a)];W[ne];B[pc];W[ob];B[ng];W[me]LB[oi:a][pk:b][kd:c]C[Next, Black can play at 'a', 'b' or 'c'. 'c' leads to immediate fighting.])
(;B[pg]N[(b)];W[oh];B[nf];W[qc];B[rc];W[ne]LB[ng:a][me:b]C[Black continues with 'a'. Black 'b' is unreasonable.]
(;B[ng]N[(a)];W[me];B[pc])
(;B[me]C[Black 13 is unreasonable.]N[mistake (b)];W[of];B[og];W[ng];B[mf];W[qe]C[Black cannot save his three stones.])))
(;W[me]N[(c)];B[le];W[mf];B[kd];W[ph];B[of];W[nd];B[mc];W[nh];B[qb];W[lh]))
(;W[ne]LB[pf:a][qg:b][pe:c][me:d]C[Black continues with 'a' to 'c'. 

Black 'd' is not recommended, but may work depending upon surrounding conditions.]N[(b)]
(;B[pf]C[White continues with 'a' or 'b'.]LB[me:a][qc:b]N[(a)]
(;W[me]N[(a)];B[pc];W[od];B[ph];W[jd])
(;W[qc]C[Black continues with 'a' or 'b'.]LB[rc:a][pd:b]N[(b)]
(;B[rc]N[(a)];W[pd];B[qe]C[White continues with 'a' or 'b'.]LB[qb:a][me:b]
(;W[qb]LB[qj:a][me:b]C[Black continues by making an extension such as 'a'. Black 'b' is also possible depending upon circumstances.]N[(a)]
(;B[qj]N[(a)];W[dp]C[White plays elsewhere.];B[me];W[og];B[pg];W[oh];B[ph];W[oi])
(;B[me]N[(b)];W[of];B[og];W[pe];B[nf];W[qf];B[oe];W[rf];B[qg];W[rg];B[qh];W[rh];B[qi]
))
(;W[me]N[(b)]))
(;B[pd]N[(b)];W[pc];B[nd];W[od];B[oe]C[This is a strong way to play. 

Fujisawa Shuko and Sakata Eio played this sequence often in their Meijin tournament matches in the 1960's.];W[nf];B[nb];W[nc];B[mc];W[ob];B[ph];W[lf]
;B[jd])))
(;B[qg]LB[pf:a][me:b][qc:c]C[White continues with 'a' or 'b'. 

White 'a' gives White thickness, while Black gets a big corner; the result favors Black slightly.

White 'b' emphasizes the top.

White 'c' has been seen in at least one professional game (Rin Kaiho (B) vs. Fujisawa Shuko (W) in the 4th Meijin league 1965--01-13). The move may be considered an attempt to avoid the disadvantage of White 'a'. White gets settled in the corner and Black on the right side.]N[(a)]
(;W[pf]N[(a)];B[qf];W[qc];B[rc];W[pd];B[qb];W[qe];B[pc];W[rd];B[qc];W[rf];B[od];W[pe]
;B[nd];W[qi]C[The result slightly favors Black.])
(;W[me]N[(b)];B[kd];W[mc])
(;W[qc]N[(c)];B[rc];W[pd]LB[qe:a][qb:b]C[Black continues with 'a'. Both sides get settled.

Black 'b' is a change in direction that render Black 3 and 5 superfluous.]
(;B[qe]N[(a)];W[qb])
(;B[qb]N[(b)];W[qe];B[pc];W[rd];B[qc];W[pe]C[Black 3 and 5 has been rendered useless.])))
(;B[pe]N[(c)];W[me]C[Black continues with 'a' or 'b'.]LB[pc:a][ld:b]
(;B[pc]N[(a)];W[ob];B[ph];W[ld])
(;B[ld]N[(b)];W[nd];B[le];W[lf];B[kf];W[kg];B[lg];W[mf];B[jf];W[lh];B[qh]))
(;B[me]N[(d)];W[nf]LB[qg:a][mf:b]C[Black continues with 'a'. Black 'b' is a mistake.]
(;B[qg]N[(a)];W[mf];B[ke])
(;B[mf]C[Black 17 is a mistake.]N[mistake (b)];W[qf];B[ng];W[pe])))
(;W[qc]C[Black continues with 'a' or 'b'.]LB[rc:a][pd:b]N[(c)]
(;B[rc]LB[pd:a][rb:b]C[Joseki continues with 'a'. White 'b' may be possible.]N[(a)]
(;W[pd]N[(a)];B[qe];W[qb];B[pg]LB[rb:a][dp:b]C[Joseki continues with 'a'. But White may play elsewhere ('b').]
(;W[rb]N[(a)];B[qk])
(;W[]C[White plays elsewhere. Black continues with 'a' or 'b'.]N[White tenuki (b)]LB[rb:a][nc:b]
(;B[rb]N[(a)];W[mb])
(;B[nc]N[(b)];W[rb];B[ob];W[rd];B[re];W[sc]LB[od:a]C[Black can continue with 'a' or play elsewhere.];B[od];W[pc];B[pe])))
(;W[rb]C[White 6 was played by Fujisawa Shuko against Go Seigen on July 3, 1964.]N[(b)];B[pc];W[qb];B[pd];W[rd];B[re];W[sc]C[While Black cannot be disatisfied, White has life in the corner and sente.]))
(;B[pd]N[(b)];W[pc];B[od]LB[nd:a][nc:b]C[White continues with 'a' or 'b'. 'a' is preferable, but may lead to complications.]
(;W[nd]LB[ne:a][nc:b]C[Black continues with 'a' or 'b'.]N[(a)]
(;B[ne]N[(a)];W[nc];B[me];W[lc];B[pj])
(;B[nc]N[(b)];W[ne]LB[mc:a][mb:b]C[Black continues with 'a' or 'b'.]
(;B[mc]N[(a)];W[rd];B[re];W[rc];B[pf];W[ng];B[ph])
(;B[mb]N[(b)];W[rd];B[re];W[rc];B[pf]LB[ob:a][me:b]C[White continues with 'a' to live in the corner, or 'b' to exchange the corner for center influence.]
(;W[ob]C[White takes the corner.]N[White corner (a)];B[me];W[nf];B[mf];W[ng];B[ph])
(;W[me]C[White chooses influence over territory.]N[White thickness (b)];B[ob];W[ld];B[pb];W[mc];B[nb];W[lb];B[qb]))))
(;W[nc]N[(b)];B[nd];W[lc];B[pj])))
(;W[mc]LB[nd:a][lc:b]C[Black continues with 'a' or 'b'. Black 'b' involves a ladder.]N[(d)]
(;B[nd]N[(a)];W[nc];B[od]LB[pd:a][ld:b][pc:c]C[White continues with 'a'. White 'b' and 'c' are inferior.]
(;W[pd]LB[pc:a][pe:b]C[Black continues with 'a'. Black 'b' is weak.]N[(a)]
(;B[pc]N[(a)];W[pe];B[qc]LB[lc:a][ld:b]C[White continues with 'a' or 'b'. White 'b' is fierce.]
(;W[lc]N[(a)];B[rf]LB[pg:a][nf:b]C[Joseki continues with 'a'. White 'b' was played by Fujisawa Shuko against Go Seigen in the 3rd Meijin League on July 3, 1964.]
(;W[pg]N[(a)];B[mf])
(;W[nf]AW[cc][po][dq]AB[pq][co]N[(b)]C[White 'b' was played by Fujisawa Shuko against Go Seigen in the 3rd Meijin League on July 3, 1964. The colors in the diagram shown are reversed from the actual game.];B[ld];W[kd];B[mf];W[ng];B[kf];W[ke];B[le]
;W[jf];B[kg];W[pj];B[dd];W[dc];B[ed];W[be];B[dg];W[ie];B[ec];W[fp];B[mp];W[hc]
;B[cf];W[ce];B[de];W[bf];B[ch];W[cp];B[pm];W[qg];B[rg];W[do];B[nm];W[mj];B[mg]
;W[qq];B[qr];W[rr];B[qp];W[rq];B[pp];W[pr];B[or];W[qs];B[nh];W[oh];B[ni];W[nj]
;B[oi];W[pi];B[og];W[ph];B[of];W[oj];B[qk];W[rh];B[kj];W[ml];B[dn];W[cn];B[cm]
;W[bo];B[bn];W[mm];B[nn];W[rp];B[qo];W[ip];B[co];W[qf];B[qe];W[cn]C[White ending up winning by 2 points.]))
(;W[ld]C[White 12 shows ferocity.]N[hane (b)];B[nf];W[qe];B[lc];W[lb];B[kc];W[kb];B[jc];W[pb];B[qb]LB[jb:a][ob:b]C[White continues with 'a' to make life. White 'b' is tough.]

(;W[jb]N[(a)];B[ic];W[ob];B[re];W[rf];B[se];W[pg];B[sb])
(;W[ob]N[(b)]C[White 22 was played by Sakata Eio against Go Seigen in 1958.];B[re];W[rf];B[se];W[pg];B[jb]C[Black 27 stops White from getting two eyes.];W[sc]C[White 28 makes the corner a ko.])))
(;B[pe]C[Black 9 is cowardly.]N[not good (b)];W[pc];B[qe];W[ld]))
(;W[ld]C[White 8 gives Black the corner and solid shape.]N[not good (b)];B[pc];W[kc])
(;W[pc]LB[pd:a][ld:b]C[Black continues with 'a'. Black 'b' is a mistake.]N[not good (c)]
(;B[pd]N[(a)];W[ld];B[le];W[ke];B[kd];W[lc];B[lf];W[je];B[pj])
(;B[ld]C[Black 9 does not work as well as other options.]N[mistake (b)];W[pd];B[pe];W[qe];B[qf];W[re];B[pf];W[rd];B[lc])))
(;B[lc]C[Black 5 may involve a ladder.]N[Black ladder (b)];W[ld]LB[nc:a][kc:b]C[Black continues with 'a'.

Black 'b' yields significant influence, but White gets better corner territory. Black must have the ladder to play 'b'.]
(;B[nc]C[Black must have the ladder to play this way.]N[Black ladder (a)];W[mb];B[me]LB[nd:a][nb:b]C[White continues with 'a'. White 'b' is a mistake.]
(;W[nd]LB[ne:a][kd:b]C[Black changes direction and continues with 'a'. Black 'b' is bad. ]N[(a)]
(;B[ne]N[(a)];W[nb];B[pe];W[kd];B[qj])
(;B[kd]N[(b)];W[ne];B[le];W[qf]C[Trying to make Black live in the corner will give White great outside strength.]))
(;W[nb]C[White 10 is a mistake.]N[mistake (b)];B[kd];W[pe];B[qe];W[pf];B[qg]))
(;B[kc]LB[pe:a][qe:b]C[Black 7 gives White superior profit in the corner.

White continues with 'a'. White 'b' is an old pattern that isn't necessarily favorable.]N[(b)]
(;W[pe]LB[me:a][qe:b]C[Black continues with 'a'. Black 'b' is unreasonable.]N[(a)]
(;B[me]N[(a)];W[qe];B[nc];W[ob];B[nb];W[nd];B[mb];W[qg])
(;B[qe]C[Black 9 is unreasonably greedy.]N[mistake (b)];W[me];B[nd];W[ne]LB[od:a][nc:b]C[Black may try 'a' or 'b'.]
(;B[od]N[(a)];W[pd];B[nc];W[nb];B[mb];W[oe];B[mc];W[qf])
(;B[nc]N[(b)];W[od];B[nb];W[ob];B[mb];W[qg])))
(;W[qe]LB[pe:a][pd:b]C[Black continues with 'a'. Black 'b' is not as favorable.]N[(b)]
(;B[pe]N[(a)];W[pd];B[qf];W[re];B[rf])
(;B[pd]C[This is an old pattern, but not favorable for Black.]N[(b)];W[me];B[nd];W[od];B[ne];W[oe];B[nf];W[pe])))))
(;W[pe]LB[pd:a][qe:b]N[(e)]C[Black continues with 'a'. Black 'b' is a mistake. ]
(;B[pd]N[(a)];W[od];B[oe]LB[pf:a][ne:b]C[White continues with 'a'. White 'b' is disadvantageous.]
(;W[pf]N[(a)];B[of];W[pg]LB[pb:a][og:b]C[Black 'a' is a mistake. 

Black continues with 'b'.]
(;B[pb]N[(a)];W[ob];B[mb];W[pc];B[qc];W[qb];B[rb];W[pa];B[ra];W[re]LB[qa:a][rc:b][nd:c]C[Black must continue with 'a'. The corner becomes a seki.

Neither Black 'b' nor 'c' work. Black 'c' is worse, as White may mistake if Black plays 'b'. 

c3, b2, a1]

(;B[nd]N[(a)];W[rc];B[rd];W[sd];B[sc];W[se];B[na];W[qe];B[rc];W[oa];B[nb];W[sb]C[And the corner is a seki.]
)
(;B[rc]LB[qe:a][ne:b]C[White 'a' is a mistake. White 'b' is correct.]N[(b)]
(;W[qe]N[mistake (a)];B[nd];W[rd];B[nb];W[sc];B[na];W[oa];B[qa];W[sb];B[pb])
(;W[ne]N[(b)];B[nf];W[mc];B[lc];W[me];B[nd];W[le];B[nh];W[ld];B[nc];W[nb];B[mc];W[na]
;B[qa];W[kc];B[kb];W[lb];B[la];W[ma]))
(;B[qa]N[mistake (c)]C[Black 21 is a mistake.];W[rd];B[rc];W[qe];B[nd];W[sc];B[nb];W[sb];B[pb];W[oa];B[nc];W[qb]
))
(;B[og]LB[re:a][qb:b]C[White may continue wth 'a' or 'b', neither giving a favorable result.]N[(b)]
(;W[re]N[(a)];B[pb];W[pc];B[qc];W[ob];B[qb];W[mb];B[rd];W[kc];B[ph];W[qh];B[qi];W[pi]
;B[oh];W[ri];B[qg];W[qj];B[rg])
(;W[qb];B[ph];W[rf];B[re];W[qh];B[qi];W[pi];B[oh];W[rh];B[ri];W[qj];B[rj];W[rk]
;B[pj];W[si];B[qk];W[sj];B[oi];W[rl];B[pb];W[pc];B[qc]LB[ob:a][rb:b]C[White may try 'a' or 'b', neither successful.]
(;W[ob]N[(a)];B[rb];W[pa];B[ra])
(;W[rb]N[(b)];B[ob]))))
(;W[ne]C[White 8 is a mistake.]N[mistake (b)];B[of];W[nd];B[pf];W[mc]))
(;B[qe]C[Black 5 is a mistake.]N[mistake (b)];W[pf];B[qg];W[qf];B[rf];W[rg];B[rh];W[pg];B[qh];W[re];B[sg];W[qc]
;B[rd];W[jd]))
(;W[]C[White plays elsewhere, not joseki.]N[White tenuki ];B[od];W[pc];B[pd];W[nc];B[nd]))
(;B[ld]LB[qc:a][nd:b][pd:c][pe:d][of:e][oe:f][me:g][md:h][qf:i][qg:j][pg:k][dp:l]C[The two-space high pincer is most common. This pincer typifies modern Go, as it maintains balance between territory and influence, offers a plethora of options, and has few weaknesses.

White responses range from 'a' to 'k'. White plays elsewhere with 'l'.

l12, k11, j10, i9, h8, g7, f6, e5, d4, c3, b2, a1]N[nikken takabasmi (2-space high pincer) (h)]
(;W[qc]LB[rc:a][pd:b]C[Black continues with 'a'. Black 'b' is not good enough.]N[(a)]
(;B[rc]N[(a)];W[pd]C[Black continues with 'a' or 'b'.]LB[qe:a][qb:b]
(;B[qe]N[(a)];W[qb];B[pg])
(;B[qb]C[White continues with 'a' or 'b'.]LB[qe:a][pe:b]N[(b)]
(;W[qe]N[(a)];B[pc];W[rd];B[qc]LB[oe:a][pe:b]C[Black 11 completes the "plum bowl" shape.

White continues with 'a' or 'b'.]N[Black plum bowl]
(;W[oe]LB[ob:a][dp:b][pf:c]C[Black should continue with 'a'. Playing elsewhere with 'b' results in a local loss. White 'c' is an overplay that may work.]N[(a)]
(;B[ob]N[(a)];W[nc];B[mb]C[The joseki ends.];W[nb]C[White's later continuation.];B[na];W[mc];B[lc];W[lb];B[ma];W[kb];B[jc])
(;B[]C[Black plays elsewhere; not recommended.]N[Black tenuki (b)];W[nb];B[re];W[rf];B[sd];W[qf])
(;B[pf]C[White 13 is an overplay.]N[overplay (c)];W[pe];B[nd]LB[od:a][ne:b]C[White continues with 'a' or 'b'.]
(;W[od]N[(a)];B[ph]LB[nb:a][rf:b]C[With forcing moves at 'a' and 'b', White will have no trouble settling himself.])
(;W[ne]N[(b)];B[nc];W[me];B[kc];W[pj]LB[lb:a]C[White may hope for more from his moyo at right than Black's territory at top. Black is left with a weak point at 'a' where White may play in.])))
(;W[pe]C[White must have the ladder at 2 to play this way.]N[White ladder (b)];B[nc];W[qi];B[ob]))
(;W[pe]C[White needs a favorable ladder at 2 to play this way.]N[White ladder (b)];B[pc];W[pb];B[qc];W[qf];B[nc];W[od];B[ob];W[me];B[mc])))
(;B[pd]C[Black 5 is not recommended.]N[not good (b)];W[pc];B[od];W[nd];B[ne]LB[nc:a][me:b]C[White continues with 'a', though White 'b' is possible with a favorable ladder.]
(;W[nc]N[(a)];B[me];W[qj])
(;W[me]N[(b)];B[nc];W[md];B[mc]LB[lc:a][nf:b]C[If the ladder off White 10 is favorable, White may play 'a'. Otherwise 'b' is the only move left.]
(;W[lc]N[(a)];B[lb];W[kc];B[kd]LB[jc:a][mf:b]C[If the ladder off 'b' is not favorable to White, White collapses as 'a' and 'b' are miai.])
(;W[nf]N[(b)];B[rc];W[rb];B[rd];W[nb];B[mb];W[na];B[kc]LB[sb:a][pg:b]C[White lives with 'a' as considerable disadvantage. White 'b' and the corner can be killed through a ko.]
(;W[sb]N[(a)];B[qh])
(;W[pg]LB[ra:a][sb:b]C[White risks the corner. Black must play 'a', not 'b'.]N[(b)]
(;B[ra]N[(a)];W[sb];B[pa];W[pb];B[ma];W[ob];B[qb]LB[mf:a]C[While White captures first, Black has a ko threat at 'a'.])
(;B[sb]N[mistake (b)]C[Black 23 is a mistake.];W[ra]C[White lives.]))))))
(;W[nd]LB[pf:a][pg:b][pc:c][oe:d][pb:e]C[Black continues with 'a' to 'e'. Black 'd' can result in complications. ]N[(b)]
(;B[pf]LB[qc:a][qb:b][jc:c][dp:d]C[White continues with 'a' to 'c'. White playing elsewhere ('d') is unthinkable.]N[(a)]
(;W[qc]N[(a)];B[rc];W[pd]LB[qe:a][qb:b]C[Black continues with 'a'. Black 'b' is reckless.]
(;B[qe]N[(a)];W[qb])
(;B[qb]C[Black 9 is a mistake.]N[mistake (b)];W[qe];B[pc];W[rd];B[qc];W[pe]))
(;W[qb]N[(b)];B[qj]LB[nf:a][jc:b][id:c][dp:d]C[White follows up with the jump to 'a' for influence, but a pincer at 'b' or 'c' is usual. 'd' show vari