Event Black Yong-Su Yoo White Ronald Schlemper Komi 6 Result B+Resign Source BGJ 67, April 1986, Page 27 Com Copyright British Go Association 1986, 1999 EndCom B 1 q16 W 2 d17 B 3 q4 W 4 c5 B 5 d15 W 6 c15 B 7 d16 W 8 c16 B 9 e17 W 10 c14 Mark A@d14 Com White 10 starts the"Large Avalanche", a very complicated joseki. White 10' at 11(A) leads to the "Small Avalanche". EndCom B 11 d14 W 12 d13 B 13 c17 W 14 d18 B 15 b17 W 16 b18 B 17 c13 Mark A@c18 B@e18 #16 C@f17 Com Black 17: If at 34(A), white turns at 33(B). If black then captures 16, white gives atari at C and black gets a tiny corner and a weak centre group. EndCom VAR B 1 c18 W 2 e18 B 3 a18 W 4 f17 B 5 b19 Prisoner b18 W 6 e16 Prisoner e17 ENDVAR W 18 b16 B 19 c12 W 20 d12 Mark A@c18 B@e18 Com White 20 is an old move, either 34(A) or 33(B) are more common nowadays. EndCom B 21 c11 Mark A@d11 B@f13 C@f15 Com Black 21: If at 22(A), White plays one point above 26(B), and black cannot defend against both 24(C) and 21. EndCom VAR B 1 d11 W 2 f13 Mark \T@f15 \T@c11 ENDVAR W 22 d11 B 23 d10 W 24 f15 Com White 24: The vital point, forcing black to make an empty triangle (connecting would be far too passive). This stone becomes a sacrifice to surround black. EndCom B 25 e14 W 26 f12 B 27 f14 W 28 g14 B 29 g15 W 30 h14 B 31 g16 W 32 j16 B 33 e18 Mark A@h17 Com Black 33: A mistake, better is 1 in the variation. EndCom VAR B 1 h17 W 2 j17 B 3 e18 W 4 c18 B 5 e10 W 6 f13 B 7 c8 Mark A@e12 ALL Com The exchange of 1 for 2 is useful, then 5 and 7 make good shape. (5 threatens to wedge in at A, forcing white 6). EndCom ENDVAR W 34 c18 B 35 c9 Mark A@b14 B@c10 Com Black 35: Before 33, A was black's sente, and if white cuts at 37(B), black captures him by playing 35. After 34 black must defend the cut, but better is to play 5 and 7 from the variation to move 33. EndCom W 36 b10 Mark A@b9 B@e10 Com White 36 attacks black's eye space. If black descends to 42(A), white's hane at B would be sente. EndCom B 37 c10 W 38 c7 B 39 f10 W 40 h12 B 41 q10 Com Black 41 & 43: Black coolly leaves his group for white to attack. The game will depend on how well White exploits it. EndCom W 42 b9 B 43 k4 W 44 h10 B 45 e7 W 46 e5 B 47 c8 W 48 b8 B 49 d7 W 50 c6 Mark C@b6 A@b14 Com White 50: An oversight. Better to play at C. White wants to keep black's group weak. But after 50, black 1(A) in the variation makes an eye. EndCom VAR W 1 c6 B 2 b14 Com Sub variation to make move nukbers the same as the BGJ article EndCom VAR B 1 b14 W 2 a13 B 3 a12 W 4 b12 B 5 b11 W 6 a11 Prisoner a12 B 7 a10 W 8 a9 Prisoner a10 B 9 b13 Mark ALL A@b7 3@a12 7@a10 Com If white 2, black exploits the cutting point at A with the throw ins at 3 & 7. EndCom ENDVAR ENDVAR B 51 f16 Mark E@o17 D@f3 Com Black 51: A mistake. Black is not worried about his group, which is alive anyway (check it yourself), but is aiming at 1 in the variation. However this move is too slow. Better is 58(E) or D. EndCom VAR B 1 f16 W 2 t1 Com EndCom B 3 e12 VAR B 1 e12 W 2 e13 B 3 f13 W 4 e11 Prisoner e12 B 5 g12 Mark ALL \T@f16 A@e12 1@e12 ENDVAR ENDVAR W 52 g4 B 53 o3 Mark E@e3 Com Black 53: Again slow. Better is to probe at E. It seems unlikely white can hope to kill the intruder. After 54 and 56 white encloses a very large corner. EndCom W 54 j3 B 55 k3 W 56 j4 B 57 k5 W 58 o17 B 59 q14 W 60 h17 B 61 g17 W 62 g18 B 63 f18 W 64 q18 B 65 r17 W 66 o15 Mark \T@o13 \T@s5 Com White 66: Makes miai of 67 and 68. At this stage White was confident of winning. EndCom B 67 o13 W 68 s5 B 69 r4 W 70 r8 B 71 s9 W 72 r9 B 73 r10 W 74 s8 B 75 s10 W 76 p8 B 77 s4 W 78 o9 B 79 m9 W 80 o11 B 81 n10 Mark F@n16 Com Black 81-83: Too direct. Black has no strong attack on white's group. A better idea is to peep at F, white connects, then black 88. EndCom VAR B 1 n16 W 2 o16 B 3 m13 ENDVAR W 82 o10 B 83 m12 W 84 p12 B 85 q13 W 86 n12 B 87 n13 W 88 m13 B 89 o14 W 90 l13 Mark A@m14 Com White 90: Simpler to play at 107(A), when the top becomes white territory. EndCom VAR W 1 m14 ENDVAR B 91 n11 W 92 o12 B 93 l12 W 94 m8 B 95 l8 W 96 m7 Mark A@l9 Com White 96: If white cuts at 1(A) in the variation, black seems to be in trouble. EndCom VAR W 1 l9 B 2 l10 W 3 k9 B 4 n8 W 5 m7 B 6 n9 W 7 n7 ENDVAR B 97 k9 W 98 n9 B 99 m10 W 100 p6 B 101 m15 Mark A@j2 Com Black 101-103 builds thickness. But first Black should play at 114(A). If white blocks, black connects in sente, otherwise the bad cutting aji enables black to live in white's corner. (How? - the details are left as a problem for kyu players.) EndCom VAR B 1 j2 Com [This sequence was not in BGJ] EndCom W 2 h2 B 3 k2 W 4 g3 B 5 m15 ENDVAR W 102 m17 B 103 k13 W 104 k14 B 105 l14 W 106 j13 B 107 m14 Prisoner l13 m13 W 108 f11 B 109 g10 W 110 g11 B 111 h9 W 112 k2 Com White 112 and 114 are enormous (count just how much) and put white into the lead. EndCom B 113 l2 W 114 j2 B 115 n6 W 116 n7 B 117 o6 W 118 o7 B 119 k15 W 120 j18 B 121 r18 W 122 q12 B 123 r12 W 124 p5 B 125 l17 W 126 l16 B 127 m16 W 128 l18 B 129 n17 W 130 m18 B 131 o18 W 132 n18 B 133 p18 W 134 p17 B 135 q17 W 136 o19 B 137 q19 Prisoner q18 W 138 n16 Prisoner n17 B 139 m3 W 140 p4 B 141 p3 W 142 t4 B 143 t3 W 144 t5 B 145 s3 W 146 j10 B 147 j14 Prisoner k14 W 148 j9 B 149 h8 W 150 j8 B 151 h7 W 152 f6 B 153 h5 W 154 g5 B 155 r5 W 156 s6 B 157 r6 W 158 r7 B 159 g19 W 160 f7 B 161 f8 W 162 m5 Com White 162: A losing blunder when ahead by 4 or 5 points. Black 163 becomes sente, and enables him to start a ko that white dare not lose. As a result black lives in white's corner and takes a large lead. EndCom B 163 l6 W 164 m6 B 165 h15 W 166 j7 Com White resigns after 233. EndCom B 167 j6 W 168 l7 B 169 k7 W 170 k8 B 171 l9 W 172 k6 Prisoner k7 B 173 e3 W 174 c3 B 175 k7 Prisoner k6 W 176 f13 B 177 j12 W 178 k6 Prisoner k7 B 179 c2 W 180 l5 Prisoner l6 B 181 g3 W 182 f2 B 183 f3 W 184 j5 B 185 b3 W 186 d3 B 187 d2 W 188 b4 B 189 a3 W 190 g2 B 191 b1 W 192 e2 B 193 h13 Prisoner j13 W 194 d1 B 195 a2 W 196 g7 B 197 g8 W 198 e1 B 199 c1 W 200 b13 B 201 h6 W 202 m4 B 203 l3 W 204 h4 B 205 e10 W 206 g13 B 207 b12 W 208 b14 B 209 j11 W 210 h11 B 211 k10 W 212 n4 B 213 n3 W 214 k16 B 215 h18 Prisoner g18 W 216 q11 B 217 r11 W 218 p16 B 219 p15 W 220 n15 B 221 o4 W 222 o5 B 223 a4 W 224 a5 B 225 a10 W 226 a11 B 227 b11 W 228 a9 Prisoner a10 B 229 a6 W 230 b5 B 231 b7 W 232 b6 B 233 d4