(;
GM[1]FF[4]VW[]AP[Many Faces of Go:10.0]
SZ[19]
HA[6]
ST[1]
PB[Ohashi, 1p]
PW[Iwamoto, 8p]
KM[0.5]
RE[B+2]
SO[Source BGJ 12, August 1970, Page 12]
AN[Iwamoto]
BR[1 dan pro]
WR[8 dan pro]

AB[dp][pp][dj][pj][dd][pd]

C[Copyright British Go Association 1970, 2000 
];W[qf];B[mc];W[pm];B[np];W[fq];B[dn];W[kq]
(;B[nn]
C[Black 8: Rather weak. A would have been better. Had white 7'
been at B, there would have been a threat that white would follow
up with C or 56(D).  As it stands, there is little immediate
danger.  
]LB[qq:D][kq:7][mo:C][lq:B][qd:A]
;W[nm];B[mn];W[nj];B[pg]
C[Black 12: Black should first protect the corner at A, but if
he wishes to save the marked stone he should play at D, so as
not to force the play in the unprotected top corner. After 12,
the sequence played to 16 is natural.  
]LB[oh:D][qd:A]
;W[pf];B[og];W[of];B[ng]
(;W[qh]
C[White 17; Too early. E was better. This would be answered with
black 25(F), white 17. Then if black 18(G), white 19(H) and black
cannot cut at 20(A). See variation.  
]LB[rh:A][rg:H][qg:G][qc:F][rd:E]
;B[qg];W[rg]
(;B[rh]
C[Black 20: Should White answer with 24(E), then Black will cut
on the other side with F, white 23(G) captures, black 21(H),
white 28(I) or 47(A) but he is in difficulty. See variation.
]LB[oi:A][nf:I][re:H][sh:G][rf:F][ri:E]
;W[re];B[qi]
C[Black 22: No. he must play G. The comment applies to all such
situations; the fear of ko is groundless, but common.  
]LB[sg:G]
;W[sh];B[ri];W[qc];B[pc];W[qb];B[nf]
(;W[gc]
C[White 29: White might have played at H, but then black could
have answered at I, which is very large.  
]LB[gd:I][rp:H]
;B[hq]
C[Black 30: Good. White is in trouble.  
]
(;W[eo]
C[White 31: If he played at 37(A) instead, the sequence to 7 in
the variation makes white safe in the corner, but then Black
can play 8 which is not good for white.  
]LB[cq:A]
;B[do];W[ip];B[gp]
C[Black 34: Good.  
];W[dq];B[gn];W[cq];B[ep]
C[Black 38: Safe, but a bit weak. Black could have played at 45(A)
to threaten the White stones below.  
]LB[jn:A]
;W[gr]
;B[hr];W[jm];B[mm];W[nl];B[in];W[jn]
(;B[ll]
C[Black 46: The jump to 52(A) would have been proper, but in a
six stone game 46 is acceptable as it makes for easier play for
Black.  
]LB[jk:A]
;W[oi];B[pi];W[im];B[hn];W[li];B[jk];W[lo];B[ji]
;W[qp]
(;B[qq]
C[Black 56: Weak. It would have been better to play the sequence
in the variation.  
]LB[qo:A]
;W[po];B[pq];W[ro];B[hl];W[ik];B[il];W[mq];B[nq]
;W[jr]
C[White 65: White is now alive, but black outside strength has
increased. The situation is still difficult for White.  
]
(;B[jl]
C[Black 66: Unnecessary. Better was 67(A), or better still the
variation from B to threaten the whole white group.  
]LB[qn:B][rq:A]
;W[rq];B[jc]
C[Black 68; Black could have played at J. His position is very
solid and he can afford to play very strongly.  
]LB[ic:J]
;W[cg]
(;B[ee]
C[Black 70: No. This invites white into the corner. The correct
play was the variation.  
]LB[ec:A]
;W[jd];B[kc];W[cc];B[cd];W[dc];B[ci];W[eg];B[bc]
;W[ec];B[ge];W[gg];B[ie];W[ig];B[id];W[bb];B[bd]
C[Black 86: Weak, he should have played at 87(A) to attack the
white chain 
]LB[ei:A]
;W[ei]
(;B[jg]
C[Black 88: Better to have played 91(A), then if white L, black
88.  
]LB[fi:L][ej:A]
;W[ih];B[jh];W[ej];B[dk];W[ch];B[di];W[dh];B[bi]
;W[hj]
C[White 97: Now white is safe here, but black is still ahead in
points.  
];B[bp];W[bq];B[ek];W[fk];B[fl];W[gk]
(;B[gl]
C[Black 104: Weak. The variation would have kept sente, and gained
about 7 points for Black.  
]LB[mr:A]
;W[mr];B[pb];W[pa];B[oa];W[qa];B[nb];W[ib];B[jb]
;W[bo];B[cp];W[ap];B[bn];W[an];B[co];W[ao];B[am];W[aq];B[bm]
;W[oe];B[nd];W[rl]
C[White 125: Big; it prevents A, a sente play worth 6 or 7 points.
]LB[rn:A]
;B[ok];W[nk];B[on];W[pl];B[ab];W[ba]
(;B[gd]
C[Black 132: Black can't play at B instead, because of the variation,
cutting off six black stones
]LB[hb:B]
;W[hc];B[mh];W[kj];B[pn];W[qn];B[rr];W[sr];B[rs]
;W[or];B[nr];W[ns];B[oo];W[qo];B[qd];W[rd];B[iq];W[jp];B[bf]
;W[bg];B[cf];W[pr];B[qr];W[lh];B[lg]
C[The record breaks off at move 156. Black won by two points. 
])
(;B[hb];W[gb];B[hc];W[fe]LB[fe:4][hc:3][gb:2][hb:1]
))
(;B[mr];W[lr];B[mp];W[lq];B[nr]
C[[I don't see how this variation keeps sente. sgb\] 
]LB[nr:5][lq:4][mp:3][lr:2][mr:1]
))
(;B[ej];W[fi];B[jg]))
(;B[ec];W[ge];B[ef]LB[ef:3][ge:2][ec:1]
))
(;B[qn];W[pn];B[rq]LB[rq:3][pn:2][qn:1]
))
(;B[qo];W[po];B[pn];W[qn];B[oo];W[ro];B[po];W[rm];B[qq]LB[qq:9][rm:8][ro:6][oo:5][qn:4][pn:3][po:7][qo:1]
))
(;B[jk]))
(;W[cq];B[dq];W[dr];B[er];W[cr];B[eq];W[bo];B[jp]LB[jp:8][bo:7][eq:6][cr:5][er:4][dr:3][dq:2][cq:1]
))
(;W[rp];B[gd]))
(;B[rh];W[ri];B[rf];W[sh];B[re];W[nf]LB[oi:A][nf:6][re:5][sh:4][rf:3][ri:2][rh:1]
))
(;W[rd];B[qc];W[qh];B[qg];W[rg]LB[rg:5][qg:4][qh:3][qc:2][rd:1][rh:A]
))
(;B[qd]))
