(;SZ[19]DT[1853-06-05]PB[Ota Yuzo]BR[7dan]PW[Honinbo Shusaku]WR[6dan]RE[W+3]US[tasuki];B[co];W[oq];B[dq];W[dc];B[oc]C[Black 1 and 5 reflect Yuzo's interest and skill in complicated fighting. 
]LB[co:1][oq:2][dq:3][dc:4][oc:5]
;W[qd];B[ce];W[qp];B[fc]C[This severe double pressing move shows Yuzo's spirit as mentioned above. 
]
(;W[ed]C[White can also play at "a" or "b". 
];B[fd];W[ef]C[White 10 and 12 are common joseki moves today, but at that time they were
new plays. 
]LB[ed:10][fd:11]
(;B[ch]C[In modern games Black 13 would be played at "a". What would happen Black
played 13 at "b" to forestall White 14? 
];W[kd]C[In a letter to his father, Shusaku wrote "10, 12 and 14 is a new device
which was worked out in a 6 hour period". White 14 was played out of
Shusaku's confidence; however, even today this is the only move, especially
since the left side situation is somewhat settled. After all, this game is
fairly close to current standards. 
]LB[ed:10][ef:12][fd:11][ch:13];B[fe];W[ee]C[After Black 15, White 16 is necessary. 
]LB[fe:15];B[gg];W[dg];B[cg]
;W[cd]C[Black 17 is a good point for both attack and defense. White 18 is a kikashi
preparing for White 20. 
]LB[gg:17][dg:18][cg:19]
(;B[oe]C[Black 21 is a good point on the right side. However, Black should probably
play at "a" first. 
];W[di]
(;B[cj]C[Black 23 was played a bit too quickly. Black can still play at "a" in the
corner. 
];W[qg]
(;B[kf]C[Black 25 is a magnificent move, typical of Yuzo's large scale manoevres. If
Black played at "a"..
];W[id]
(;B[ff]C[Black 27 is not merely defensive (see diagram).
];W[mc];B[og]C[Of course Black 29 aims at A but White feels compelled to secure the group
on the upper side.
]LB[qh:A];W[hc]C[Although we have to admit that White's plan in the beginning has been
successful, in that he has created a living group, Black 25 is an excellent
move.
]LB[og:29][kf:25][ff:27][id:26][mc:28];B[qh];W[rh]
;B[qf]
(;W[qi]C[White has virtually no choice but to play at 34. If he played at "a"..
];B[rf];W[ph]C[Black has no opted for corner territory while White has thickness.
]LB[rf:35]
(;B[md]C[As far as the overal game is concerned, a play at "a" on the lower side, a
perfect extension from his shimari and a ladder breaker, is extremely large.
Unfortunately, Black can't quite afford to leave the corner yet.
];W[ld];B[me]C[Black intends to close off the corner by leaning on White.
]LB[md:37][ld:38];W[nc]
(;B[ob]C[Black thought that "a" would be too easy-going on White.
];W[nd];B[od]
(;W[pf]C[White 44 is perfectly timed. If White played at "a" instead..
]
(;B[pe]C[What happens now if Black cuts at "a"?
];W[ne]
(;B[of]C[Black 47 is forced by White 44. If Black blocks at "a".. Overall Black's
position has now become a little thin.
]LB[pf:44][pe:45][ne:46];W[dh]C[White now feels that he can afford to patch up the weakness here, after his
good result on the upper side. This weaskens the Black group on the left
side and White has taken the lead.
]
(;B[mf]C[If Black plays 49 at "a", to prevent White making his moyo..
];W[ni];B[if]
(;W[iq]C[Black 49 and 51 bottle up the group on the upper edge, but they are more
defensive against White 48. In exchange, White is staking out a huge moyo
based on his shimari. White 52 is an excellent point, but modern
professional feeling would favour a higher extension at "a" or "b".
]LB[mf:49][if:51][ni:50][dh:48];B[jp]C[The shoulder hit immediately hits at the weak point of 52.
]LB[iq:52];W[ip];B[jo];W[kr]
(;B[qo]C[This looks like the game-deciding invasion. Yuzo thought this was the best
way to break into the right side. Other moves could be at "a" or "b".
];W[po];B[qn];W[pp];B[om];W[ql];B[qm];W[pl];B[on];W[mn]C[White 66 is an excellent blocking move. White is containing Black and
gaining strength facing the centre.
];B[rl];W[rk]
;B[rp];W[rq];B[rn]C[Black offers to play a ko.
]
(;W[ml]C[Which White declines in order to build up the centre.
];B[sq];W[sr];B[sp];W[qr];B[sm];W[sk];B[sl]
(;W[fq]C[A play at "a" would have been more aggressive.
];B[lm];W[mm];B[io]C[Black 83 is a strong move, giving him some breathing-space.
];W[bf];B[cf];W[be];B[ck]
(;W[nb]C[White 88 is rather defensive, in line with White 72 and 80. If White plays
elsewhere.. White has protected himself everywhere and now only the centre
remains to be disputed.
];B[gp];W[gq];B[fj];W[dr];B[cr];W[dp];B[cq];W[ep];B[kk]C[Black 97 is a good point. Black attempts to make a large territory in the
centre, but this is very difficult..
];W[em];B[fl]
;W[fm];B[gm];W[gn];B[hm];W[cm]C[After pressing Black into the centre, White breaks up the side. Black has
made no profit.
];B[dl];W[bo]C[White 6 is an excellent answer to Black 5.
]LB[dl:105];B[cp];W[cn];B[er];W[bm]

(;B[bp]C[White 10 threatens to reduce the corner, if Black plays elsewhere..
]LB[bm:110]
(;W[hn]C[Why doesn't White cut off the four stones with "a" now?
];B[im];W[ho]C[White calmly captures one stone and clinches victory.
]LB[hn:112][im:113];B[bg];W[fh];B[gh];W[pg];B[qe];W[oa];B[pa]
;W[na];B[qb];W[li];B[eb]
(;W[cb]C[White 26 is common sense; if he played at "a"..
];B[ki];W[lj];B[kj];W[fi];B[gi];W[ol]C[White is now clearly in the lead.
];B[gb];W[hb];B[do];W[eo];B[lq]
;W[kq];B[lp];W[kp];B[no];W[lr];B[gs];W[km];B[kl];W[lg];B[lh];W[mg];B[kg];W[mh]
;B[hr];W[ln];B[jm];W[ek];B[el];W[ej];B[fk];W[cl];B[dk];W[bk];B[bj];W[mo];B[np]
;W[fr];B[fs];W[eq];B[ds];W[nq];B[ko];W[aj];B[dn];W[dm];B[en];W[fn];B[hq];W[hp]
;B[ao];W[bn];B[fg];W[eg];B[ha];W[ia];B[ga];W[jb];B[jr];W[jq];B[ir];W[kh];B[jh]
;W[he];B[oh];W[oi];B[hf];W[db];B[ai];W[ak];B[af];W[bd];B[ci];W[ea];B[je];W[jd]
;B[kn];W[dj];B[mq];W[mr];B[nm];W[nl];B[lk];W[mk];B[rg];W[an];B[ap];W[ae];B[ag]
;W[sg];B[sf];W[sh];B[ks];W[ls];B[js];W[ge];B[in];W[ll];B[gd];W[de];B[km];W[lh]C[228 moves. White wins by 3 points. 
]
)
(;W[db];B[da];W[ca];B[fa]C[Black is aiming at A and white will be forced to play the ko.
]LB[ib:A]))
(;W[ci];B[bi];W[bh];B[bk];W[bg];B[ho]C[If White now plays elsewhere..
];W[];B[fp];W[eq];B[en]C[Black can now cut off the seven white stones.
]LB[ci:1][bi:2][bh:3][bk:4][bg:5][ho:6][fp:8][eq:9][en:10][co:1][oq:2][dq:3][dc:4][oc:5][qd:6][ce:7][qp:8][fc:9][ed:10][fd:11][ef:12][ch:13][kd:14][fe:15][ee:16][gg:17][dg:18][cg:19][cd:20][oe:21][di:22][cj:23][qg:24][kf:25][id:26][ff:27][mc:28][og:29][hc:30][rh:32][qf:33][qi:34][rf:35][ph:36][md:37][ld:38][me:39][nc:40][ob:41][nd:42][od:43][pf:44][pe:45][ne:46][of:47][dh:48][mf:49][ni:50][if:51][iq:52][jp:53][ip:54][jo:55][kr:56][qo:57][po:58][qn:59][pp:60][om:61][ql:62][qm:63][pl:64][on:65][mn:66][rl:67][rk:68][rp:69][rq:70][rn:71][ml:72][sq:73][sr:74][sp:75][qr:76][sm:77][sk:78][sl:79][fq:80][lm:81][mm:82][io:83][bf:84][cf:85][be:86][ck:87][nb:88][gp:89][gq:90][fj:91][dr:92][cr:93][dp:94][cq:95][ep:96][kk:97][em:98][fl:99][fm:100][gm:101][gn:102][hm:103][cm:104][dl:105][bo:106][cp:107][cn:108][er:109][bm:110][bp:111]
))
(;B[];W[ar];B[br];W[aq];B[ds];W[ci];B[bi];W[bh];B[bg];W[bj];B[ah];W[bk]C[White would reduce the corner in sente and then kill the group on the left
side.
]LB[ar:2][br:3][aq:4][ds:5][ci:6][bi:7][bg:9][bj:10][ah:11][bk:12][co:1][oq:2][dq:3][dc:4][oc:5][qd:6][ce:7][qp:8][fc:9][ed:10][fd:11][ef:12][ch:13][kd:14][fe:15][ee:16][gg:17][dg:18][cg:19][cd:20][oe:21][di:22][cj:23][qg:24][kf:25][id:26][ff:27][mc:28][og:29][hc:30][rh:32][qf:33][qi:34][rf:35][ph:36][md:37][ld:38][me:39][nc:40][ob:41][nd:42][od:43][pf:44][pe:45][ne:46][of:47][dh:48][mf:49][ni:50][if:51][iq:52][jp:53][ip:54][jo:55][kr:56][qo:57][po:58][qn:59][pp:60][om:61][ql:62][qm:63][pl:64][on:65][mn:66][rl:67][rk:68][rp:69][rq:70][rn:71][ml:72][sq:73][sr:74][sp:75][qr:76][sm:77][sk:78][sl:79][fq:80][lm:81][mm:82][io:83][bf:84][cf:85][be:86][ck:87][nb:88][gp:89][gq:90][fj:91][cr:93][dp:94][cq:95][ep:96][kk:97][em:98][fl:99][fm:100][gm:101][gn:102][hm:103][cm:104][dl:105][bo:106][cp:107][cn:108][er:109][bm:110][bh:8]
))
(;W[]
(;B[lb]
(;W[mb];B[jc];W[jd];B[ib];W[hb];B[lc];W[la];B[kb];W[ka];B[nf];W[ia];B[ja]C[White would have a ko that he cannot win.
]LB[lb:2][mb:3][jc:4][jd:5][ib:6][hb:7][lc:8][la:9][kb:10][ka:11][nf:12][ia:13][ja:14][co:1][oq:2][dq:3][dc:4][oc:5][qd:6][ce:7][qp:8][fc:9][ed:10][fd:11][ef:12][ch:13][kd:14][fe:15][ee:16][gg:17][dg:18][cg:19][cd:20][oe:21][di:22][cj:23][qg:24][kf:25][id:26][ff:27][mc:28][og:29][hc:30][rh:32][qf:33][qi:34][rf:35][ph:36][md:37][ld:38][me:39][nc:40][ob:41][nd:42][od:43][pf:44][pe:45][ne:46][of:47][dh:48][mf:49][ni:50][if:51][iq:52][jp:53][ip:54][jo:55][kr:56][qo:57][po:58][qn:59][pp:60][om:61][ql:62][qm:63][pl:64][on:65][mn:66][rl:67][rk:68][rp:69][rq:70][rn:71][ml:72][sq:73][sr:74][sp:75][qr:76][sm:77][sk:78][sl:79][fq:80][lm:81][mm:82][io:83][bf:84][cf:85][be:86][ck:87]
)
(;W[kb];B[mb];W[lc];B[nb];W[eb];B[fb];W[gb];B[fa];W[ib]C[White would have to live in gote, which is a big yose loss.
]LB[kb:1][mb:2][lc:3][nb:4][eb:5][fb:6][gb:7][fa:8][ib:9][lb:2][co:1][oq:2][dq:3][dc:4][oc:5][qd:6][ce:7][qp:8][fc:9][ed:10][fd:11][ef:12][ch:13][kd:14][fe:15][ee:16][gg:17][dg:18][cg:19][cd:20][oe:21][di:22][cj:23][qg:24][kf:25][id:26][ff:27][mc:28][og:29][hc:30][rh:32][qf:33][qi:34][rf:35][ph:36][md:37][ld:38][me:39][nc:40][ob:41][nd:42][od:43][pf:44][pe:45][ne:46][of:47][dh:48][mf:49][ni:50][if:51][iq:52][jp:53][ip:54][jo:55][kr:56][qo:57][po:58][qn:59][pp:60][om:61][ql:62][qm:63][pl:64][on:65][mn:66][rl:67][rk:68][rp:69][rq:70][rn:71][ml:72][sq:73][sr:74][sp:75][qr:76][sm:77][sk:78][sl:79][fq:80][lm:81][mm:82][io:83][bf:84][cf:85][be:86][ck:87]
))
(;B[jc];W[jd];B[lb];W[kb];B[kc];W[jb]C[Black cannot play at 1 here, since White can win with 6.
]LB[jc:1][jd:2][lb:3][kb:4][kc:5][jb:6][co:1][oq:2][dq:3][dc:4][oc:5][qd:6][ce:7][qp:8][fc:9][ed:10][fd:11][ef:12][ch:13][kd:14][fe:15][ee:16][gg:17][dg:18][cg:19][cd:20][oe:21][di:22][cj:23][qg:24][kf:25][id:26][ff:27][mc:28][og:29][hc:30][rh:32][qf:33][qi:34][rf:35][ph:36][md:37][ld:38][me:39][nc:40][ob:41][nd:42][od:43][pf:44][pe:45][ne:46][of:47][dh:48][mf:49][ni:50][if:51][iq:52][jp:53][ip:54][jo:55][kr:56][qo:57][po:58][qn:59][pp:60][om:61][ql:62][qm:63][pl:64][on:65][mn:66][rl:67][rk:68][rp:69][rq:70][rn:71][ml:72][sq:73][sr:74][sp:75][qr:76][sm:77][sk:78][sl:79][fq:80][lm:81][mm:82][io:83][bf:84][cf:85][be:86][ck:87]
)))
(;W[hn]))
(;W[sp];B[so];W[ro];B[mm]C[Black can easily move out into the centre with 4.
]LB[sp:1][so:2][ro:3][mm:4][co:1][oq:2][dq:3][dc:4][oc:5][qd:6][ce:7][qp:8][fc:9][ed:10][fd:11][ef:12][ch:13][kd:14][fe:15][ee:16][gg:17][dg:18][cg:19][cd:20][oe:21][di:22][cj:23][qg:24][kf:25][id:26][ff:27][mc:28][og:29][hc:30][rh:32][qf:33][qi:34][rf:35][ph:36][md:37][ld:38][me:39][nc:40][ob:41][nd:42][od:43][pf:44][pe:45][ne:46][of:47][dh:48][mf:49][ni:50][if:51][iq:52][jp:53][ip:54][jo:55][kr:56][qo:57][po:58][qn:59][pp:60][om:61][ql:62][qm:63][pl:64][on:65][mn:66][rl:67][rk:68][rq:70][rn:71]
))
(;B[rp];W[pp]C[After 2, White is quite happy.
]LB[rp:1][pp:2][co:1][oq:2][dq:3][dc:4][oc:5][qd:6][ce:7][qp:8][fc:9][ed:10][fd:11][ef:12][ch:13][kd:14][fe:15][ee:16][gg:17][dg:18][cg:19][cd:20][oe:21][di:22][cj:23][qg:24][kf:25][id:26][ff:27][mc:28][og:29][hc:30][rh:32][qf:33][qi:34][rf:35][ph:36][md:37][ld:38][me:39][nc:40][ob:41][nd:42][od:43][pf:44][pe:45][ne:46][of:47][dh:48][mf:49][ni:50][if:51][iq:52][jp:53][ip:54][jo:55][kr:56]
)
(;B[po];W[qo]C[White's calm answer at 2 is painful for Black.
]LB[po:1][qo:2][co:1][oq:2][dq:3][dc:4][oc:5][qd:6][ce:7][qp:8][fc:9][ed:10][fd:11][ef:12][ch:13][kd:14][fe:15][ee:16][gg:17][dg:18][cg:19][cd:20][oe:21][di:22][cj:23][qg:24][kf:25][id:26][ff:27][mc:28][og:29][hc:30][rh:32][qf:33][qi:34][rf:35][ph:36][md:37][ld:38][me:39][nc:40][ob:41][nd:42][od:43][pf:44][pe:45][ne:46][of:47][dh:48][mf:49][ni:50][if:51][iq:52][jp:53][ip:54][jo:55][kr:56]
))
(;W[jp])
(;W[ip]))
(;B[jq];W[ig];B[if];W[hf];B[hg];W[ih];B[jg];W[he];B[hi]C[White can cut the groups apart immediately, but Black can make reasonable
fighting shape up to 9 and Black 1 is on the ideal point. It would appear
that Black's moves 49 and 51 in the game were based on a miscalculation
about the safety of White's upper group.
]LB[jq:1][ig:2][if:3][hf:4][hg:5][ih:6][jg:7][he:8][hi:9][co:1][oq:2][dq:3][dc:4][oc:5][qd:6][ce:7][qp:8][fc:9][ed:10][fd:11][ef:12][ch:13][kd:14][fe:15][ee:16][gg:17][dg:18][cg:19][cd:20][oe:21][di:22][cj:23][qg:24][kf:25][id:26][ff:27][mc:28][og:29][hc:30][rh:32][qf:33][qi:34][rf:35][ph:36][md:37][ld:38][me:39][nc:40][ob:41][nd:42][od:43][pf:44][pe:45][ne:46][of:47][dh:48]
))
(;B[nf];W[pg]C[White will connect at 2 and A and B are miai.
]LB[nf:1][pg:2][co:1][oq:2][dq:3][dc:4][oc:5][qd:6][ce:7][qp:8][fc:9][ed:10][fd:11][ef:12][ch:13][kd:14][fe:15][ee:16][gg:17][dg:18][cg:19][cd:20][oe:21][di:22][cj:23][qg:24][kf:25][id:26][ff:27][mc:28][og:29][hc:30][rh:32][qf:33][qi:34][rf:35][ph:36][md:37][ld:38][me:39][nc:40][ob:41][nd:42][od:43][pf:44][pe:45][ne:46][of:A][qe:B]
))
(;B[pg];W[pe];B[qe];W[pd];B[rd];W[qc];B[rc];W[qb];B[rb];W[of];B[nf];W[ng]C[White can now play at 12.
]LB[pg:1][pe:2][qe:3][pd:4][rd:5][qc:6][rc:7][qb:8][rb:9][of:10][nf:11][ng:12][co:1][oq:2][dq:3][dc:4][oc:5][qd:6][ce:7][qp:8][fc:9][ed:10][fd:11][ef:12][ch:13][kd:14][fe:15][ee:16][gg:17][dg:18][cg:19][cd:20][oe:21][di:22][cj:23][qg:24][kf:25][id:26][ff:27][mc:28][og:29][hc:30][rh:32][qf:33][qi:34][rf:35][ph:36][md:37][ld:38][me:39][nc:40][ob:41][nd:42][od:43][pf:44]
;B[oh];W[mg];B[mf];W[ni];B[pi];W[oi];B[qh];W[rg];B[pj];W[sf];B[re];W[ph]C[White will then play the ko and will not answer any threat by Black.
]LB[mf:15][mg:14][oh:13][ni:16][oi:18][pj:21][pi:17][sf:22][re:23][qh:19]
))
(;W[ne];B[nf];W[pf];B[pg];W[pe];B[qe];W[pd];B[rd];W[qc];B[rc];W[qb];B[rb];W[of]
;B[ng]C[Black will win the fight.
]LB[ne:1][nf:2][pf:3][pg:4][pe:5][qe:6][pd:7][rd:8][qc:9][rc:10][qb:11][rb:12][of:13][ng:14][co:1][oq:2][dq:3][dc:4][oc:5][qd:6][ce:7][qp:8][fc:9][ed:10][fd:11][ef:12][ch:13][kd:14][fe:15][ee:16][gg:17][dg:18][cg:19][cd:20][oe:21][di:22][cj:23][qg:24][kf:25][id:26][ff:27][mc:28][og:29][hc:30][rh:32][qf:33][qi:34][rf:35][ph:36][md:37][ld:38][me:39][nc:40][ob:41][nd:42][od:43]
))
(;B[od];W[ob];B[pb];W[na]C[White can easily live in sente with 2 and 4.
]LB[od:1][ob:2][pb:3][na:4][co:1][oq:2][dq:3][dc:4][oc:5][qd:6][ce:7][qp:8][fc:9][ed:10][fd:11][ef:12][ch:13][kd:14][fe:15][ee:16][gg:17][dg:18][cg:19][cd:20][oe:21][di:22][cj:23][qg:24][kf:25][id:26][ff:27][mc:28][og:29][hc:30][rh:32][qf:33][qi:34][rf:35][ph:36][md:37][ld:38][me:39][nc:40]
))
(;B[jq];W[ob]
(;B[pc];W[pb];B[qc];W[qb];B[rb];W[nc];B[nd]C[Black would have to allow White into the corner.
]LB[jq:1][ob:2][pc:3][pb:4][qc:5][qb:6][rb:7][nc:8][nd:9][co:1][oq:2][dq:3][dc:4][oc:5][qd:6][ce:7][qp:8][fc:9][ed:10][fd:11][ef:12][ch:13][kd:14][fe:15][ee:16][gg:17][dg:18][cg:19][cd:20][oe:21][di:22][cj:23][qg:24][kf:25][id:26][ff:27][mc:28][og:29][hc:30][rh:32][qf:33][qi:34][rf:35][ph:36]
)
(;B[pb];W[pc];B[pd];W[qc];B[nb];W[pe];B[od];W[pf];B[qe];W[pg];B[qb];W[rd]C[Black will lose the fight.
]LB[pb:1][pc:2][pd:3][qc:4][nb:5][pe:6][od:7][pf:8][qe:9][pg:10][qb:11][rd:12][jq:1][ob:2][co:1][oq:2][dq:3][dc:4][oc:5][qd:6][ce:7][qp:8][fc:9][ed:10][fd:11][ef:12][ch:13][kd:14][fe:15][ee:16][gg:17][dg:18][cg:19][cd:20][oe:21][di:22][cj:23][qg:24][kf:25][id:26][ff:27][mc:28][og:29][hc:30][rh:32][qf:33][qi:34][rf:35][ph:36]
)))
(;W[rf];B[pg];W[rg];B[qe];W[re];B[qi]C[White's position here is ridicously low.
]LB[rf:1][pg:2][rg:3][qe:4][re:5][qi:6][co:1][oq:2][dq:3][dc:4][oc:5][qd:6][ce:7][qp:8][fc:9][ed:10][fd:11][ef:12][ch:13][kd:14][fe:15][ee:16][gg:17][dg:18][cg:19][cd:20][oe:21][di:22][cj:23][qg:24][kf:25][id:26][ff:27][mc:28][og:29][hc:30][qh:31][rh:32][qf:33]
))
(;C[Black can aim at the cut of 1 later, but White can handle it as long as
the ladder starting with A favours him.
]LB[fh:4][df:4][df:3][dh:2][eg:1][fg:5][ci:6][bi:7][bj:8][ck:A]AB[ff][eg][df][fg][bi]AW[dh][fh][ci][bj]
))
(;B[ic];W[og];B[me];W[id]C[Black I here is rather tepid, allowing white to take the good point of 2.
]LB[ic:1][og:2][me:3][id:4][co:1][oq:2][dq:3][dc:4][oc:5][qd:6][ce:7][qp:8][fc:9][ed:10][fd:11][ef:12][ch:13][kd:14][fe:15][ee:16][gg:17][dg:18][cg:19][cd:20][oe:21][di:22][cj:23][qg:24]
))
(;B[cb]
(;W[be];B[bf];W[de];B[cf];W[bd];B[cj];W[eb];B[qf]C[Black sacrifices a stone and gains sente to play at 9 on the right, 
]LB[cb:1][be:2][bf:3][de:4][cf:5][bd:6][cj:7][eb:8][qf:9][co:1][oq:2][dq:3][dc:4][oc:5][qd:6][ce:7][qp:8][fc:9][ed:10][fd:11][ef:12][ch:13][kd:14][fe:15][ee:16][gg:17][dg:18][cg:19][cd:20][oe:21][di:22]
)
(;W[bf];B[db];W[ci];B[bd];W[be];B[cc];W[dd];B[bc];W[cf];B[qf]C[Black could sacrifice some stones on the side, take the corner in sente,
to return to 10 on the right. 
]LB[bf:1][db:2][ci:3][bd:4][be:5][cc:6][dd:7][bc:8][cf:9][qf:10][cb:1][co:1][oq:2][dq:3][dc:4][oc:5][qd:6][ce:7][qp:8][fc:9][ed:10][fd:11][ef:12][ch:13][kd:14][fe:15][ee:16][gg:17][dg:18][cg:19][cd:20][oe:21][di:22]
)))
(;B[cb];W[be];B[bf];W[de];B[cf];W[db];B[bd];W[bc];B[ae];W[bb]C[Black can secure his stones in this area by playing 1 immediately. The
sequence to 10 is inevitable and then a White move at A could be ignored.
Shusaku commented, in his letter to his father, that this would have been
an interesting line for Black to follow. 
]LB[cb:1][bf:3][de:4][cf:5][db:6][bd:7][bc:8][ae:9][bb:10][co:1][oq:2][dq:3][dc:4][oc:5][qd:6][ce:7][qp:8][fc:9][ed:10][fd:11][ef:12][ch:13][kd:14][fe:15][ee:16][gg:17][dg:18][cg:19][cd:20][be:2][di:A]
))
(;B[fe])
(;B[kc];W[cg];B[cb];W[cc];B[db];W[ec];B[eb];W[fe];B[hd]C[This Black 1 seems to be well placed. If white immediately turns to the
isolated Black stone, Black can counter through to 9. This variation has a
modern feel. 
]LB[kc:1][cg:2][cb:3][cc:4][db:5][ec:6][eb:7][fe:8][hd:9][co:1][oq:2][dq:3][dc:4][oc:5][qd:6][ce:7][qp:8][fc:9][ed:10][fd:11][ef:12]
))
(;W[de];B[df];W[ee];B[cd];W[ec];B[gd];W[cc];B[gf];W[ff];B[ci];W[gg];B[hf]C[This standard sequence appeared in 1842 in a game between Honinbo Shuwa
and Yuzo. 
]LB[de:1][df:2][ee:3][cd:4][ec:5][gd:6][cc:7][gf:8][ff:9][ci:10][gg:11][hf:12][co:1][oq:2][dq:3][dc:4][oc:5][qd:6][ce:7][qp:8][fc:9]
)
(;W[fd];B[gd];W[fe];B[ge];W[de];B[df];W[ff];B[cd];W[gc];B[ec];W[db];B[gb];W[hc]
;B[hb];W[ic];B[ib];W[jc];B[dd];W[ed];B[eb];W[ea];B[fb];W[cc];B[bd];W[gf]C[In a game in 1851 this sequence appeared in another of Shuwa's games. 
]LB[fd:1][gd:2][fe:3][ge:4][de:5][df:6][ff:7][cd:8][gc:9][ec:10][db:11][gb:12][hc:13][hb:14][ic:15][ib:16][jc:17][dd:18][ed:19][eb:20][ea:21][fb:22][cc:23][bd:24][gf:25][co:1][oq:2][dq:3][dc:4][oc:5][qd:6][ce:7][qp:8][fc:9]
))