1# CATEGORY=FUSEKI_STRATEGY 2# SEVERITY=5 3loadsgf games/arend/gnugo-gnugo1.sgf 25 41 reg_genmove black 5#? [C4]* 6 7# CATEGORY=KO 8# SEVERITY=3 9loadsgf games/arend/gnugo-gnugo1.sgf 112 102 reg_genmove white 11#? [H15] 12 13# CATEGORY=CONNECTION 14# SEVERITY=10 15loadsgf games/arend/gnugo-gnugo1.sgf 139 163 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. 23loadsgf games/arend/exper1.sgf 7 244 reg_genmove black 25#? [R14|S15|R17] 26 27#CATEGORY=STRATEGY 28#DESCRIPTION=GNU Go should escape with its cutting stone. 29loadsgf games/arend/exper1.sgf 25 305 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. 35loadsgf games/arend/gnugo-gnugo2.sgf 57 367 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 42loadsgf games/arend/gnugo-gnugo2.sgf 60 438 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. 49loadsgf games/arend/gnugo-gnugo2.sgf 61 509 reg_genmove black 51#? [S17] 52 53#CATEGORY=STRATEGY 54# J7 is extremely overvalued. This is caused by pattern CB11. 55loadsgf games/arend/gnugo-gnugo2.sgf 73 5610 reg_genmove black 57#? [!J7] 58 59#CATEGORY=STRATEGY 60# K6 is overvalued by GNU Go 3.0.0. 61loadsgf games/arend/gnugo-gnugo2.sgf 91 6211 reg_genmove black 63#? [!K6] 64 65#CATEGORY=BLUNDER 66loadsgf games/arend/gnugo-gnugo2.sgf 163 6712 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. 72loadsgf games/arend/gnugo-gnugo4.sgf 27 7314 reg_genmove black 74#? [P17]* 75 76#CATEGORY=FUSEKI_STRATEGY 77# C6 is clearly the wrong side for approaching LL corner. 78loadsgf games/arend/gnugo-gnugo4.sgf 31 7915 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. 89loadsgf games/arend/gnugo-gnugo4.sgf 45 9016 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. 95loadsgf games/arend/gnugo-gnugo4.sgf 153 9617 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. 101loadsgf games/arend/gnugo-gnugo4.sgf 168 10218 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. 110loadsgf games/arend/gnugo-gnugo5.sgf 39 11120 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. 117loadsgf games/arend/gnugo-gnugo5.sgf 78 11821 reg_genmove white 119#? [!F9] 120 121# Immediately take the double sente point! 122loadsgf games/arend/gnugo-gnugo5.sgf 80 12322 reg_genmove white 124#? [D14]* 125 126# H10 is quite overvalued here. 127loadsgf games/arend/gnugo-gnugo5.sgf 105 12823 reg_genmove black 129#? [!H10] 130 131# Low Shimari clearly better here 132# See also arend2:130 133loadsgf games/arend/gnugo-gnugo6.sgf 20 13424 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. 141loadsgf games/arend/gnugo-gnugo6.sgf 174 14225 reg_genmove white 143#? [C19|F7] 144 145#CATEGORY=FUSEKI_STRATEGY 146# D17 is wrong direction; in this position this is really bad. 147loadsgf games/arend/gnugo-gnugo7.sgf 17 14828 reg_genmove black 149#? [C16] 150 151#CATEGORY=FUSEKI_STRATEGY 152# Black C15 is sente here, so W C14 is mandatory. 153loadsgf games/arend/gnugo-gnugo7.sgf 24 15429 reg_genmove white 155#? [B14|C14] 156 157#CATEGORY=BLUNDER 158# GNU Go played F8. 159loadsgf games/arend/gnugo-gnugo7.sgf 79 16030 reg_genmove black 161#? [C13]* 162 163#CATEGORY=OWL_DEFEND (?) 164# B14 can (and should) be saved here 165loadsgf games/arend/gnugo-gnugo7.sgf 81 16631 reg_genmove black 167#? [B13|C13] 168 169#CATEGORY=CONNECTION 170#SEVERITY=9 171loadsgf games/arend/gnugo-gnugo7.sgf 137 17232 reg_genmove black 173#? [F9|E8|G8] 174 175loadsgf games/arend/gnugo-gnugo7.sgf 140 17633 reg_genmove white 177#? [F9]* 178 179#CATEGORY=ENDGAME_TUNING 180loadsgf games/arend/gnugo-gnugo7.sgf 173 18134 reg_genmove black 182#? [!K8] 183 184# This is a serious mistake. H17 is not huge, its HUGE. 185loadsgf games/arend/gnugo-gnugo8.sgf 32 18635 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. 192loadsgf games/arend/constructed1.sgf 19336 reg_genmove black 194#? [C5] 195 196#CATEGORY=ENDGAME_TUNING 197loadsgf games/arend/constructed2.sgf 19837 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? 210loadsgf games/arend/constructed3.sgf 21138 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). 217loadsgf games/arend/constructed4.sgf 21839 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 224loadsgf games/arend/constructed5.sgf 22540 reg_genmove white 226#? [B7] 227 228#CATEGORY=ENDGAME_TUNING 229# EB715 necessary 230loadsgf games/arend/constructed6.sgf 23141 reg_genmove white 232#? [B6] 233