| 1 | # CATEGORY=FUSEKI_STRATEGY |
| 2 | # SEVERITY=5 |
| 3 | loadsgf games/arend/gnugo-gnugo1.sgf 25 |
| 4 | 1 reg_genmove black |
| 5 | #? [C4]* |
| 6 | |
| 7 | # CATEGORY=KO |
| 8 | # SEVERITY=3 |
| 9 | loadsgf games/arend/gnugo-gnugo1.sgf 112 |
| 10 | 2 reg_genmove white |
| 11 | #? [H15] |
| 12 | |
| 13 | # CATEGORY=CONNECTION |
| 14 | # SEVERITY=10 |
| 15 | loadsgf games/arend/gnugo-gnugo1.sgf 139 |
| 16 | 3 reg_genmove black |
| 17 | #? [P6|Q5] |
| 18 | |
| 19 | # These kind of fights might be very difficult to do well |
| 20 | # with current GNU Go methods (How should it choose between the different |
| 21 | # 'correct' alternatives here? - R14 seems clearly best to me). |
| 22 | # But certainly it should not tenuki. |
| 23 | loadsgf games/arend/exper1.sgf 7 |
| 24 | 4 reg_genmove black |
| 25 | #? [R14|S15|R17] |
| 26 | |
| 27 | #CATEGORY=STRATEGY |
| 28 | #DESCRIPTION=GNU Go should escape with its cutting stone. |
| 29 | loadsgf games/arend/exper1.sgf 25 |
| 30 | 5 reg_genmove black |
| 31 | #? [D7|E7|E6]* |
| 32 | |
| 33 | #CATEGORY=STRATEGY |
| 34 | #DESCRIPTION=In this position, GNU Go plays L10 because of an enormous assumed strategic effect on the M16 dragon, which is quite safe. |
| 35 | loadsgf games/arend/gnugo-gnugo2.sgf 57 |
| 36 | 7 reg_genmove black |
| 37 | #? [C3] |
| 38 | |
| 39 | #CATEGORY=BLUNDER |
| 40 | # S 16 can be captured. S17 is better, but another big move |
| 41 | # should be accepted as well |
| 42 | loadsgf games/arend/gnugo-gnugo2.sgf 60 |
| 43 | 8 reg_genmove white |
| 44 | #? [!S16] |
| 45 | |
| 46 | #CATEGORY=TACTICAL_READING |
| 47 | # GNU Go rejects S17 because it is "strategically or tactically unsafe". |
| 48 | # Must be a misread. |
| 49 | loadsgf games/arend/gnugo-gnugo2.sgf 61 |
| 50 | 9 reg_genmove black |
| 51 | #? [S17] |
| 52 | |
| 53 | #CATEGORY=STRATEGY |
| 54 | # J7 is extremely overvalued. This is caused by pattern CB11. |
| 55 | loadsgf games/arend/gnugo-gnugo2.sgf 73 |
| 56 | 10 reg_genmove black |
| 57 | #? [!J7] |
| 58 | |
| 59 | #CATEGORY=STRATEGY |
| 60 | # K6 is overvalued by GNU Go 3.0.0. |
| 61 | loadsgf games/arend/gnugo-gnugo2.sgf 91 |
| 62 | 11 reg_genmove black |
| 63 | #? [!K6] |
| 64 | |
| 65 | #CATEGORY=BLUNDER |
| 66 | loadsgf games/arend/gnugo-gnugo2.sgf 163 |
| 67 | 12 reg_genmove black |
| 68 | #? [C16|B16] |
| 69 | |
| 70 | #CATEGORY=STRATEGY |
| 71 | # GNU Go does not see that P17 helps his group as well, and plays O13. |
| 72 | loadsgf games/arend/gnugo-gnugo4.sgf 27 |
| 73 | 14 reg_genmove black |
| 74 | #? [P17]* |
| 75 | |
| 76 | #CATEGORY=FUSEKI_STRATEGY |
| 77 | # C6 is clearly the wrong side for approaching LL corner. |
| 78 | loadsgf games/arend/gnugo-gnugo4.sgf 31 |
| 79 | 15 gg_genmove black 1 |
| 80 | #? [F3]* |
| 81 | |
| 82 | |
| 83 | # GNU Go loves this move! (H2 is the point to play here.) It is impossible |
| 84 | # to teach GNU Go not to play there with minor pattern tuning. Problem is |
| 85 | # huge follow_up value; there is no check at all in the move valuation |
| 86 | # whether a sente move is actually worth something if opponent answers |
| 87 | # (here it is aji-keshi). |
| 88 | # This looses only a few points, but comes up very often. |
| 89 | loadsgf games/arend/gnugo-gnugo4.sgf 45 |
| 90 | 16 reg_genmove black |
| 91 | #? [!G3] |
| 92 | |
| 93 | #CATEGORY=TACTICAL_READING |
| 94 | # GNU Go moves at C9. I do not know what it is afraid of. |
| 95 | loadsgf games/arend/gnugo-gnugo4.sgf 153 |
| 96 | 17 reg_genmove black |
| 97 | #? [C7] |
| 98 | |
| 99 | # Maybe this problem is suboptimal, because there is a ko involved, and |
| 100 | # GNU Go gets it wrong even without the ko. |
| 101 | loadsgf games/arend/gnugo-gnugo4.sgf 168 |
| 102 | 18 reg_genmove white |
| 103 | #? [P18|P19|R18|R19|S18|S17|S16|S14|S13|T14|T16] |
| 104 | |
| 105 | #CATEGORY=PATTERN_TUNING |
| 106 | # GNU Go often plays this inefficient shape. Should be correctable with an |
| 107 | # additional pattern. Core of the problem is however that GNU Go does not |
| 108 | # understand the essence of the iken tobi -- it can be cut, but Black does |
| 109 | # not mind that, since a cut only strengthens Black. |
| 110 | loadsgf games/arend/gnugo-gnugo5.sgf 39 |
| 111 | 20 reg_genmove black |
| 112 | #? [!L15] |
| 113 | |
| 114 | #CATEGORY=STRATEGY |
| 115 | # This inefficient move is produced by owl. But of course it should not |
| 116 | # be owl in charge of strengthening this big dragon. |
| 117 | loadsgf games/arend/gnugo-gnugo5.sgf 78 |
| 118 | 21 reg_genmove white |
| 119 | #? [!F9] |
| 120 | |
| 121 | # Immediately take the double sente point! |
| 122 | loadsgf games/arend/gnugo-gnugo5.sgf 80 |
| 123 | 22 reg_genmove white |
| 124 | #? [D14]* |
| 125 | |
| 126 | # H10 is quite overvalued here. |
| 127 | loadsgf games/arend/gnugo-gnugo5.sgf 105 |
| 128 | 23 reg_genmove black |
| 129 | #? [!H10] |
| 130 | |
| 131 | # Low Shimari clearly better here |
| 132 | # See also arend2:130 |
| 133 | loadsgf games/arend/gnugo-gnugo6.sgf 20 |
| 134 | 24 restricted_genmove white P16 P17 |
| 135 | #? [P17]* |
| 136 | |
| 137 | #CATEGORY=ENDGAME_TUNING |
| 138 | # C19 is either double sente, or worth at least 5 pts in reverse sente, |
| 139 | # which is 10 pts. T14 (chosen by GNU Go) is dame. F7 is nearly as large |
| 140 | # as C19. |
| 141 | loadsgf games/arend/gnugo-gnugo6.sgf 174 |
| 142 | 25 reg_genmove white |
| 143 | #? [C19|F7] |
| 144 | |
| 145 | #CATEGORY=FUSEKI_STRATEGY |
| 146 | # D17 is wrong direction; in this position this is really bad. |
| 147 | loadsgf games/arend/gnugo-gnugo7.sgf 17 |
| 148 | 28 reg_genmove black |
| 149 | #? [C16] |
| 150 | |
| 151 | #CATEGORY=FUSEKI_STRATEGY |
| 152 | # Black C15 is sente here, so W C14 is mandatory. |
| 153 | loadsgf games/arend/gnugo-gnugo7.sgf 24 |
| 154 | 29 reg_genmove white |
| 155 | #? [B14|C14] |
| 156 | |
| 157 | #CATEGORY=BLUNDER |
| 158 | # GNU Go played F8. |
| 159 | loadsgf games/arend/gnugo-gnugo7.sgf 79 |
| 160 | 30 reg_genmove black |
| 161 | #? [C13]* |
| 162 | |
| 163 | #CATEGORY=OWL_DEFEND (?) |
| 164 | # B14 can (and should) be saved here |
| 165 | loadsgf games/arend/gnugo-gnugo7.sgf 81 |
| 166 | 31 reg_genmove black |
| 167 | #? [B13|C13] |
| 168 | |
| 169 | #CATEGORY=CONNECTION |
| 170 | #SEVERITY=9 |
| 171 | loadsgf games/arend/gnugo-gnugo7.sgf 137 |
| 172 | 32 reg_genmove black |
| 173 | #? [F9|E8|G8] |
| 174 | |
| 175 | loadsgf games/arend/gnugo-gnugo7.sgf 140 |
| 176 | 33 reg_genmove white |
| 177 | #? [F9]* |
| 178 | |
| 179 | #CATEGORY=ENDGAME_TUNING |
| 180 | loadsgf games/arend/gnugo-gnugo7.sgf 173 |
| 181 | 34 reg_genmove black |
| 182 | #? [!K8] |
| 183 | |
| 184 | # This is a serious mistake. H17 is not huge, its HUGE. |
| 185 | loadsgf games/arend/gnugo-gnugo8.sgf 32 |
| 186 | 35 reg_genmove white |
| 187 | #? [H17|J19] |
| 188 | |
| 189 | #CATEGORY=ENDGAME_TUNING |
| 190 | # Its just one point difference, but it happens a couple of times every |
| 191 | # game. |
| 192 | loadsgf games/arend/constructed1.sgf |
| 193 | 36 reg_genmove black |
| 194 | #? [C5] |
| 195 | |
| 196 | #CATEGORY=ENDGAME_TUNING |
| 197 | loadsgf games/arend/constructed2.sgf |
| 198 | 37 reg_genmove black |
| 199 | #? [A5] |
| 200 | |
| 201 | #CATEGORY=STRATEGY |
| 202 | # I think this problem summarizes well two common misjudgements |
| 203 | # of the influence function: |
| 204 | # 1. Breaking into an opponents moyo is enormously |
| 205 | # undervalued (that is why patterns like LE14--safe jump towards |
| 206 | # oppoents moyo--need to have a fixed minimum value, which often leads |
| 207 | # bad moves) |
| 208 | # 2. O5 considerably weakens the influence of N5. Maybe this is not weighted |
| 209 | # highly enough by GNU Go? |
| 210 | loadsgf games/arend/constructed3.sgf |
| 211 | 38 reg_genmove white |
| 212 | #? [O5] |
| 213 | |
| 214 | #CATEGORY=STRATEGY |
| 215 | # This is an example for part 1 of my comment of the previous problem. |
| 216 | # This slightly adapted from a game (to make the problem more specific). |
| 217 | loadsgf games/arend/constructed4.sgf |
| 218 | 39 reg_genmove black |
| 219 | #? [G10|H10|F13] |
| 220 | |
| 221 | #CATEGORY=ENDGAME_TUNING |
| 222 | # EB714 is necessary here; without it, GNU Go played B6, only for the |
| 223 | # reason of filling a liberty |
| 224 | loadsgf games/arend/constructed5.sgf |
| 225 | 40 reg_genmove white |
| 226 | #? [B7] |
| 227 | |
| 228 | #CATEGORY=ENDGAME_TUNING |
| 229 | # EB715 necessary |
| 230 | loadsgf games/arend/constructed6.sgf |
| 231 | 41 reg_genmove white |
| 232 | #? [B6] |