Author: Uri Blass
Date: 06:29:08 09/02/03
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On September 02, 2003 at 08:53:59, Alastair Scott wrote: >[D]r1b1k2r/1p1p1ppp/4pq2/8/pQP1n3/P1n2NP1/1B2PP1P/R3KB1R w KQkq - 2 15 > >When reviewing my (human-human) games with Yace Paderborn it came across a >stunner here: 15.g4!? > >I would not have thought of it for a second, yet it appears to win a piece at >the cost of one or two pawns and a very messy position, hence the "!?". What >does your program think? > >Interestingly, the "stronger" programs tend to go for g4, whereas the "weaker >ones" (plus myself :) go for Rc1. > >Alastair Movei changes its mind from Rc1 to g4 at depth 8 but later changes its mind again to Bg2(at depth 11) The score for Bg2 becomes more optimistic and it see +0.7 for white at depth 13 but at that depth it changes its mind again to g4 +1.25/13 Here is the analysis after 10 minutes on A1000(the version is about 20% slower than the best version that I have in nps because there is some data under construction): 8 9 78 116475 a1c1 c3a2 b2f6 a2b4 f6g7 h8g8 g7b2 b4c6 f1g2 8 10 155 238109 g3g4 8 39 185 287234 g3g4 8 50 215 334951 g3g4 h7h6 a1c1 c3a2 b2f6 a2b4 f6g7 h8h7 g7h6 h7h6 a3b4 8 50 218 338976 g3g4 h7h6 a1c1 c3a2 b2f6 a2b4 f6g7 h8h7 g7h6 h7h6 a3b4 9 50 304 470765 g3g4 h7h6 a1c1 c3a2 b2f6 a2b4 f6g7 h8h7 g7h6 h7h6 a3b4 9 50 330 509388 g3g4 h7h6 a1c1 c3a2 b2f6 a2b4 f6g7 h8h7 g7h6 h7h6 a3b4 10 50 505 765685 g3g4 h7h6 a1c1 c3a2 b2f6 a2b4 f6g7 h8h7 g7h6 h7h6 a3b4 10 50 568 864116 g3g4 h7h6 a1c1 c3a2 b2f6 a2b4 f6g7 h8h7 g7h6 h7h6 a3b4 11 31 989 1505588 g3g4 h7h6 a1c1 c3a2 b2f6 a2b4 f6g7 h8h7 g7h6 h7h6 a3b4 a4a3 11 32 3086 4709864 f1g2 11 61 4250 6437576 f1g2 11 57 6884 10276402 f1g2 a8a6 a1c1 c3a2 b2f6 a2b4 f6g7 h8g8 f3e5 g8g7 g2e4 b4c6 11 57 6910 10310182 f1g2 a8a6 a1c1 c3a2 b2f6 a2b4 f6g7 h8g8 f3e5 g8g7 g2e4 b4c6 12 57 10343 15312272 f1g2 d7d5 c4d5 c8d7 b4b7 a8c8 d5e6 d7e6 a1d1 f6e7 b7e7 e8e 7 b2c3 c8c3 12 57 14446 21182265 f1g2 d7d5 c4d5 c8d7 b4b7 a8c8 d5e6 d7e6 a1d1 f6e7 b7e7 e8e 7 b2c3 c8c3 13 70 19833 29023145 f1g2 d7d5 c4d5 c8d7 d5e6 d7e6 b4b7 a8c8 b7e4 c3e4 b2f6 e4f 6 f3d4 e8f8 13 71 25774 37966184 g3g4 13 100 29242 43096010 g3g4 13 125 38336 56901650 g3g4 g7g5 h2h4 d7d5 h4g5 f6g7 c4d5 e6d5 a1c1 d5d4 b2c3 e4 c3 f3d4 13 125 38738 57532642 g3g4 g7g5 h2h4 d7d5 h4g5 f6g7 c4d5 e6d5 a1c1 d5d4 b2c3 e4 c3 f3d4 14 132 52660 77747196 g3g4 h7h6 h2h4 b7b5 g4g5 f6e7 b2c3 e7b4 c3b4 b5c4 g5h6 h8 h6 f3d2 d7d5 d2e4 d5e4 Uri
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