EVENT WHITE John Diamond, 4d BLACK Tony Goddard, 4d BOARDSIZE 19 DATE 23 June 1972 KOMI 5.5 TIMELIMIT 2hrs+30s byoyomi SOURCE BGJ 18, October 1972, Page 14 ANALYSIS Comments by John Diamond; edited by John Tilley. COM Copyright British Go Association 1972, 2000 (Y) = yes, (N) = no, show whether Haruyama, 6p, agrees or disagrees with the comment. Black Rank: 4 dan Write Rank: 4 dan ENDCOM B 1 R16 W 2 C17 B 3 E3 W 4 Q3 B 5 P17 W 6 C4 COM White 6: Diamond prevents black from enclosing two corners, but white's position on the left side is a little low. ENDCOM B 7 R5 W 8 Q8 B 9 O5 MARK Q8 Q3 COM Black 9: Nearly always played as it keeps white 8 separated from 4 and therefore weak. The sequence 7 to 18 is very common. ENDCOM W 10 P5 B 11 P6 W 12 P4 B 13 Q6 W 14 O6 B 15 O7 W 16 N6 B 17 P8 W 18 Q10 MARK Q10 P8 N6 O7 O6 Q6 P4 P6 P5 O5 MARK Q8 R5 COM The sequence 7 to 18 is very common. ENDCOM B 19 Q12 MARK A@O3 COM Black 19: Normal in this position as black must utilise the power of his upper right corner. The joseki of A is not so aggresive. ENDCOM VAR B 1 O3 ENDVAR W 20 P9 B 21 M7 COM Black 21: Fujisawa Shuko played this move first and it is correct although Diamond did not realise it. ENDCOM W 22 N5 B 23 N7 W 24 N9 B 25 D16 W 26 D17 MARK C@C16 B@E17 COM White 26: John Tilley feels this is incorrect as black B is too good in conjunction with the upper right corner. C may be better but white is now too low. ENDCOM VAR W 1 C16 ENDVAR B 27 E16 W 28 B15 B 29 N11 MARK D@D13 COM Black 29: A typical Goddard move. Tony is an aggressive player and he loves a difficult fight. It is possible to leave the joseki in the upper left, (e.g. Honibo Shusai v. Go Sei-gen 1937 - see Matsuda's Go Letters) but joseki is to play at D. An analysis of the game in an upstairs room felt that 29 was a bit loose. ENDCOM W 30 L9 B 31 M4 MARK O5 COM (Y) Black 31: Diamond feels that this is unnecessary as it destroys the aji of 9. ENDCOM W 32 N4 B 33 M10 MARK A@M9 COM (Y) Black 33: Definitely bad, as black 34(A) could be useful much later on. There is no point in protecting the opponent's weakness for him. ENDCOM W 34 M9 B 35 K7 W 36 L6 B 37 L7 W 38 P12 MARK E@H9 COM White 38: Diamond was unhappy about this as it strengthens black too much. He suggested E after the game. Black's territory now becomes secure. ENDCOM B 39 P11 W 40 Q11 B 41 P13 W 42 R12 MARK C@Q13 B@E17 A@R13 D@O12 COM (Y) White 42: Diamond also regretted this move. It should have been nobi at 58(C), because, if Black plays 58, white 44(A) and black B is good for Goddard. 43(D) would have been better at 58 therefore. ENDCOM VAR W 1 R12 B 2 O12 W 3 R13 B 4 E17 COM ...if Black plays 58, white 44(A) and black B is good for Goddard. ENDCOM ENDVAR B 43 Q13 VAR B 1 O12 ENDVAR W 44 R13 B 45 R14 W 46 S14 B 47 S15 W 48 Q14 B 49 R15 W 50 O17 MARK G@K16 COM (N) White 50: Diamond, worried by black's tremendous influence leapt in at once. Afterwards Diamond regretted this move, but it is difficult for white. Maybe an invasion around G? ENDCOM B 51 O18 W 52 O8 MARK E16 D16 COM 52-76: White's four stones, clinging to the black mass at the top of the board are weak, so they don't constitute a great threat to black 25 and 27. White 52 was unnecessary and black, by attacking well with 61 and 67, has done better than white. ENDCOM B 53 P7 W 54 P16 B 55 N17 W 56 O13 B 57 P14 W 58 O12 B 59 O14 W 60 N14 B 61 N13 W 62 O15 B 63 Q15 W 64 N12 B 65 M13 W 66 M12 B 67 L12 W 68 L13 B 69 M14 W 70 L14 B 71 N15 W 72 M15 B 73 N14 W 74 K12 B 75 L11 W 76 O11 MARK O11 L11 K12 M15 N15 L14 M14 L13 L12 M12 MARK M13 N12 Q15 O15 N13 N14 O14 O12 P14 O13 MARK N17 P16 P7 O8 COM 52-76: White's four stones, clinging to the black mass at the top of the board are weak, so they don't constitute a great threat to black 25 and 27. White 52 was unnecessary and black, by attacking well with 61 and 67, has done better than white. (N) However, 71 should have been at 72 for a better shaped position. Now white will have to struggle. ENDCOM B 77 K11 COM 77-81: White's right side group is now much weaker as his escape route to the centre is cut off. ENDCOM W 78 J12 B 79 J11 W 80 H12 B 81 H11 COM 77-81: White's right side group is now much weaker as his escape route to the centre is cut off. ENDCOM W 82 G11 COM (N) White 82 may be wrong as it allows black a cut. Diamond feels he should have played at 83 himself. ENDCOM B 83 G12 W 84 H14 MARK F@J14 COM (Y) White 84: A terrible move and now Diamond is in big trouble. The vital point was F - the eye stealing tesuji and centre of three stones. It becomes apparent fairly soon how bad this move was. ENDCOM B 85 G13 W 86 J15 B 87 L15 W 88 K15 B 89 L16 COM Black 89: White has no eyes now - see variation ENDCOM VAR B 1 L16 W 2 PASS COM This move is a pass to show how Black can attack the group. ENDCOM B 3 K14 W 4 K13 B 5 H13 W 6 J14 B 7 J13 W 8 K14 ENDVAR W 90 F15 MARK L15 E16 D16 COM White 90: Too good for white. 25 and 27 are in trouble. Possibly black 87 was premature. Diamond is wriggling free. Black now tries to patch his centre position, leaving 25 and 27 for later. ENDCOM B 91 E14 W 92 F14 B 93 E12 W 94 E15 B 95 G10 W 96 F11 B 97 E10 W 98 F10 B 99 F9 W 100 G9 B 101 E11 W 102 H10 B 103 J9 W 104 F8 B 105 E9 W 106 G7 B 107 K9 W 108 D7 B 109 F12 W 110 G10 B 111 D15 W 112 D14 COM The fighting is extremely involved and with white's cut at 112 both black and white have two weak groups. ENDCOM B 113 C14 W 114 E13 MARK A@D13 COM White 114: A mistake - better at 115(A). White can aim next at 114 and black will be in trouble. ENDCOM VAR W 1 D13 ENDVAR B 115 D13 W 116 E14 B 117 H16 MARK D@F17 C@C15 B@C13 A@H15 COM (Y) Black 117: A superb move. It becomes apparent that white is weaker than he seemed. White must protect at 118(A). He cannot cut at 119(B) or 120(C). White cannot connect at 135(D). ENDCOM W 118 H15 B 119 C13 W 120 C15 B 121 E17 W 122 L17 MARK B@J17 A@G17 COM (N) White 122: Wrong. If Diamond had played 130(A) immediately he would have avoided Black 136(B), which could have killed the white group. ENDCOM B 123 K14 W 124 K13 MARK B@J17 A@H13 COM White 124' should be played at 125(A) giving up two stones so that he could get to the vital point of 136(B). ENDCOM B 125 H13 W 126 J14 B 127 J13 W 128 K14 B 129 M16 W 130 G17 B 131 D18 W 132 C18 B 133 G16 W 134 F16 B 135 F17 W 136 J17 COM (Y) White 136: The only move. Black had to play it earlier. ENDCOM B 137 H17 W 138 H18 B 139 G18 W 140 J18 B 141 E19 W 142 C19 B 143 L18 W 144 J16 COM (Y) White 144: White is now several moves ahead in the semeai. The position is now: ... Black ... 38: Upper right; 5-10: Lower right; 10: Left; 5-10: Lower left; 63: TOTAL ... White ... 10: Right (so he thinks); 20: Lower right; 35: Upper left; 10: Lower left; 5: Komi; 80: TOTAL However, White's right side group is still weak and if Goddard can kill it he will win. The analysis upstairs led by Dr. Hattori, 5d, thought that Goddard could capture six stones in sente and, if Diamond tried to save them, he would lose everything. ENDCOM B 145 H19 W 146 J19 B 147 C8 W 148 J5 COM White 148: With this move Diamond attacks black's centre to right side group. ENDCOM B 149 H6 W 150 H7 B 151 K6 MARK C@J8 B@J7 A@J6 COM Black 151: He cannot play 152(A) as white 156(B) threatens 151 and 157(C) simultaneously. ENDCOM W 152 J6 B 153 K4 W 154 L5 B 155 K5 W 156 J7 B 157 J8 W 158 H3 B 159 C7 COM Black 159: White could have played here himself, as it threatens the black group. ENDCOM W 160 S3 B 161 O10 COM Black 161: At last! ENDCOM W 162 P10 COM White 162: Popular opinion was that John Diamond could not play here. He had to abandon six stones and make eyes on the edge. His group is now struggling. ENDCOM B 163 N10 W 164 O9 B 165 S8 W 166 R9 B 167 R8 W 168 R7 B 169 S7 W 170 S9 B 171 R3 MARK B@S6 S8 A@Q7 COM Black 171: Black has to live as well. This move makes way for 175(B). If black and white both live then black will be behind and cannot win. Should Black have played 169' at A for the final ko? There are conflicting opinions about black 165 - some think that Tony lost his chance there. ENDCOM W 172 R4 B 173 S4 W 174 R2 B 175 S6 W 176 S11 B 177 S13 W 178 S12 B 179 T14 W 180 T9 B 181 D5 COM 181-198: Difficult to evaluate. White seemed to gain a few points. After 191 Tony Goddard was playing 30 seconds byoyomi. ENDCOM W 182 D4 B 183 E4 W 184 E5 B 185 E6 W 186 F5 B 187 C5 W 188 D2 B 189 E2 W 190 D3 B 191 C2 W 192 E1 B 193 F1 W 194 D1 B 195 B4 W 196 F2 B 197 C3 W 198 G1 MARK G1 C3 F2 B4 D1 F1 E1 C2 D3 E2 MARK D2 C5 F5 E6 E5 E4 D4 D5 COM 181-198: Difficult to evaluate. White seemed to gain a few points. After 191 Tony Goddard was playing 30 seconds byoyomi. ENDCOM B 199 N3 W 200 L3 B 201 C1 W 202 F1 B 203 L4 W 204 M3 B 205 K3 W 206 N2 B 207 M6 W 208 O3 B 209 L2 W 210 J2 B 211 M2 W 212 N3 B 213 K2 W 214 T4 COM White 214 started a hanami ko for white. ENDCOM B 215 M5 W 216 Q7 B 217 T5 W 218 S5 B 219 R6 W 220 Q9 B 221 S4 W 222 L8 B 223 K8 W 224 S5 B 225 J10 W 226 L10 COM White 226-228 gains 8 points. ENDCOM B 227 S4 W 228 M11 COM White 226-228 gains 8 points. ENDCOM B 229 T3 W 230 A12 B 231 B12 W 232 A13 B 233 A11 W 234 B14 B 235 A14 COM Black 235: A mistake due to time trouble. ENDCOM W 236 B13 B 237 C11 W 238 T2 B 239 K17 W 240 L19 B 241 E7 W 242 E8 B 243 D8 W 244 B3 B 245 B2 W 246 T8 B 247 T4 W 248 M18 B 249 M17 W 250 T7 B 251 T6 W 252 G15 B 253 N18 W 254 M19 B 255 G17 W 256 G19 B 257 F19 W 258 H19 B 259 K19 W 260 K18 B 261 N19 W 262 L17 COM White 262: This ko is not as serious as it looks. ENDCOM B 263 G8 W 264 H8 B 265 L18 W 266 D12 B 267 C12 W 268 L17 B 269 H9 W 270 K16 B 271 G8 W 272 G9 B 273 F6 W 274 G6 B 275 G10 W 276 Q5 B 277 J1 W 278 G4 B 279 J3 W 280 H2 B 281 N1 W 282 O1 B 283 J4 W 284 H4 B 285 M1 W 286 T12 B 287 T13 W 288 H1 B 289 K1 W 290 G8 COM 290 moves in all. White won by 21 points. John Diamond also won the second game to retain his British Championship. The game shown here is fully analysed in the September [1972] Go Review, by Haruyama, 6p. The key points are listed in the web page for this article. ENDCOM