EVENT BOARDSIZE 19 COM Black: Yamabe, 9p White: Ohira, 9p Komi: 4.5 Timelimit: 9hours Result: W+Resign Source: BGJ 1, Summer 1967, Page 13c Copyright British Go Association 1967, 1999 ENDCOM B 1 r16 W 2 d17 B 3 q3 W 4 d3 B 5 p17 W 6 r5 B 7 q7 COM Black 7: A very popular move these days, settling this area quickly. ENDCOM W 8 p6 COM White 8 - 14: All these plays are standard. ENDCOM B 9 n3 W 10 c15 B 11 c5 W 12 d8 B 13 f5 W 14 g3 MARK #8-14 COM White 8 - 14: All these plays are standard. ENDCOM B 15 j16 MARK A@q11 COM Black 15: Aiming to take a large position by playing A next. ENDCOM W 16 q12 B 17 e15 MARK B@f17 COM Black 17: If 17' was played at B, white 17 would utilise 12 to the maximum in building up territory. ENDCOM VAR B 1 f17 W 2 e15 ENDVAR W 18 e16 B 19 d15 COM Black 19 - 22: Standard sequence for this corner position. ENDCOM W 20 c14 B 21 f15 W 22 d16 MARK #19-22 COM Black 19 - 22: Standard sequence for this corner position. ENDCOM B 23 e12 MARK #12 COM Black 23: Attacking 12, ... ENDCOM W 24 f7 MARK #11 #13 COM ... so white retaliates with a strong counter attack on 11 & 13. ENDCOM B 25 c3 COM Black 25: The normal practice, strengthening his stones and reducing the corner. ENDCOM W 26 c2 B 27 d4 W 28 e3 MARK A@b3 \T@g3 COM White 28: If White plays 28' at A, Black plays as variation and isolates white \t on the south side. ENDCOM VAR W 1 b3 B 2 e3 W 3 c4 PRISONER c3 B 4 d2 W 5 c3 B 6 e5 MARK \T@g3 ENDVAR B 29 h5 W 30 h7 B 31 q14 MARK #16 COM Black 31 protects the corner and attacks 16 strongly. ENDCOM W 32 q9 B 33 p7 W 34 o7 MARK A@o6 #32 COM White 34: The usual reply to 33 is 38(A), but in this case there is a white stone at 32 and white can afford to attack the black stones more strongly. ENDCOM B 35 q6 W 36 q5 B 37 o8 W 38 o6 B 39 p9 W 40 r8 B 41 q10 MARK A@p10 COM Black 41: This is better than 42(A), which forces white along the fourth line and lets white gain an easy life, even though the cut at 42(A) can be taken. ENDCOM W 42 p10 B 43 r10 W 44 r9 B 45 s10 W 46 o10 B 47 n8 W 48 r7 MARK A@r12 COM White 48 ensures a connection to the lower white group, and takes away the base of the black stones forcing them to run into the centre. It also forces 49(A). ENDCOM B 49 r12 W 50 m10 B 51 l8 W 52 p8 COM White 52 reduces the liberties of the black group by one with sente. ENDCOM B 53 q8 PRISONER p8 W 54 r6 B 55 p8 W 56 m7 B 57 m8 W 58 k10 B 59 j8 W 60 h10 B 61 j7 COM Black 61: If Black plays elsewhere, white can cut here and separate all the black armies. ENDCOM W 62 g12 MARK A@h15 COM White 62 threatens to cut at A. For then: the variation isolates the central black men. ENDCOM VAR W 1 g12 B 2 Pass COM (Not on diagram) ENDCOM W 3 h15 COM See sub variation to get move numbers from 1, the same as the web page. ENDCOM VAR W 1 h15 B 2 h16 W 3 g16 B 4 f16 W 5 g15 ENDVAR ENDVAR B 63 g9 COM Black 63: Black again counter attacks instead of protecting the cutting point directly. ENDCOM W 64 g10 B 65 e9 W 66 h9 COM White 66 - 86: White continues to isolate the central black men and to profit by attacking their possible connections, but gives up two stones in the process. ENDCOM B 67 e8 W 68 e7 B 69 d7 W 70 d6 B 71 c7 W 72 c6 B 73 b6 W 74 b7 B 75 c8 W 76 e5 B 77 b4 W 78 a6 B 79 b5 W 80 d9 B 81 e10 W 82 b8 B 83 c9 W 84 d10 B 85 b9 W 86 d11 MARK #66-86 COM White 66 - 86: White continues to isolate the central black men and to profit by attacking their possible connections, but gives up two stones in the process. ENDCOM B 87 f6 COM Black 87 - 94: Black connects his two weak groups and is forced to make eyes by 94. ENDCOM W 88 e6 B 89 g8 W 90 h8 B 91 g7 W 92 e4 B 93 h6 W 94 j4 MARK #87-94 COM Black 87 - 94: Black connects his two weak groups and is forced to make eyes by 94. ENDCOM B 95 m6 W 96 m5 B 97 l6 W 98 o4 B 99 o3 W 100 b10 MARK A@a8 B@e11 C@l5 #99 COM White 100 forces 101(A) and threatens to cut at B after he has prevented a possible black play at C, connecting to the lower black group (99). ENDCOM B 101 a8 W 102 m4 B 103 e11 W 104 j14 MARK A@h15 COM White 104 safeguards his central group which has been without proper eyes all this time as black has never had an opportunity to attack them! It also threatens disconnection at A (see 62). ENDCOM B 105 f16 W 106 k16 B 107 j17 W 108 m3 MARK A@s3 COM White 108 secures some territory and forces 109(A), otherwise black will lose these men. ENDCOM B 109 s3 W 110 m14 B 111 o12 W 112 n12 B 113 n13 W 114 o13 COM White 114: White 1 in variation would lose three stones as shown. ENDCOM VAR W 1 m13 B 2 n11 W 3 m12 B 4 n10 MARK \T@p10 \T@o10 \T@q12 ENDVAR B 115 n14 W 116 o14 B 117 m12 W 118 n11 B 119 m13 W 120 r13 MARK A@p12 COM White 120 gains 126(A) with sente. ENDCOM B 121 l11 W 122 l10 B 123 q13 W 124 n15 B 125 l14 W 126 p12 B 127 r14 W 128 k15 COM White 128: If white 128' at 1 in Dia 4, then black captures all the white stones . ENDCOM VAR W 1 m15 B 2 k15 W 3 j15 B 4 l16 W 5 l15 B 6 k14 W 7 k17 B 8 k18 W 9 l17 B 10 m17 W 11 l18 B 12 m18 W 13 m16 PRISONER l16 B 14 l19 W 15 l16 B 16 o15 ENDVAR B 129 l16 MARK A@l15 COM Black 129' at 130(A) would lose all the black stones. ENDCOM W 130 l15 B 131 m15 PRISONER m14 W 132 m16 B 133 n16 COM Black 133 gains the ko but he hasn't enough ko threats to win it. ENDCOM W 134 m14 PRISONER m15 B 135 c16 W 136 c17 B 137 m15 PRISONER m14 W 138 d14 COM White 138 threatens to disconnect the black men again. ENDCOM B 139 k4 W 140 k3 B 141 h4 W 142 j5 B 143 j6 W 144 h3 B 145 k5 W 146 j3 B 147 c12 W 148 m14 PRISONER m15 B 149 c13 COM Black 149 captures the five white stones but the ko is larger. ENDCOM W 150 m15 B 151 f18 W 152 o18 COM White 152 destroys all the black territory in this sector. ENDCOM B 153 n17 W 154 p18 B 155 q17 W 156 n18 B 157 h13 W 158 j13 B 159 h12 W 160 j12 B 161 e18 W 162 r18 B 163 q18 W 164 q19 COM White 164: After this black cannot kill the white men for the variation lives ENDCOM VAR W 1 q19 B 2 m17 COM See sub variation to make move numbers match web page. ENDCOM VAR B 1 m17 W 2 m18 B 3 l17 W 4 s16 ENDVAR ENDVAR B 165 b19 W 166 d19 B 167 b16 COM Black 167 attempts to kill the corner. If Black plays 167' at 1 in variation white lives easily. ENDCOM VAR B 1 d18 W 2 c18 B 3 c19 W 4 b13 B 5 b12 W 6 a18 MARK All ENDVAR W 168 c18 B 169 d18 W 170 b15 B 171 c19 W 172 b18 COM White 172: After this the corner lives. The variation is the best black can do. === As Black is about 10 points down and has little time left he resigns. ENDCOM VAR W 1 b18 B 2 b12 COM See sub variation to make move numbers match web page. ENDCOM VAR B 1 b12 W 2 a12 B 3 a11 W 4 a13 B 5 a15 W 6 b14 B 7 a17 W 8 b17 B 9 a18 W 10 a16 PRISONER c16 b16 B 11 b16 PRISONER a16 W 12 b13 B 13 e19 PRISONER d19 W 14 c16 B 15 a16 W 16 a14 B 17 d19 W 18 a19 PRISONER a15 a17 a18 b16 a16 B 19 a16 W 20 e13 MARK A@f13 B@d12 C@b11 D@c10 E@a7 F@a10 COM After this, white either connects with A or kills three men with B-F. ENDCOM VAR W 1 e13 B 2 d12 W 3 f13 ENDVAR VAR W 1 e13 B 2 f13 W 3 d12 B 4 b11 W 5 c10 B 6 a7 PRISONER b7 b8 W 7 a10 ENDVAR ENDVAR ENDVAR