Author: Robert Hyatt
Date: 09:14:00 09/06/02
Go up one level in this thread
On September 06, 2002 at 10:56:54, Uri Blass wrote: >On September 06, 2002 at 07:23:15, Yuriy Lyapko wrote: > >>Which chess engine will see that Rb1 is winning in this position? >> >>[D] b4bk1/p2p4/p1p1p2p/P1P1Pp1P/3P3p/2N4N/1r3PP1/4R1K1 w - - >> >>Best regards, >>George > >Movei0076 can see a small advantage for white with Rb1(p850,32 Mbytes hash) >in less than 10 minutes. > >I imagine that stronger engines can find it faster. > >scores at the last iterations(from white point of view): I don't make any claims about being "stronger" or "weaker" than much of anything, but Rb1 is the _only_ move Crafty considers. It isn't going to like white's position, of course, until it sees white winning material, which suggests that the bishop scoring needs more control on the lack of mobility in this position. > The score starts out at -1.0 (good for black) and drops to about -.5 quickly. Which is totally wrong. Although, as I have said before, I don't think the _score_ is as important as the move. Crafty obviously feels that the rooks need to go, which is the right idea here. > > >10 Rb1 -0.14 >11 Rb1 0.01 >12 Rb1 -0.10 >12 Nf4 0.01 >13 Nf4 0.03 >14 Nf4 0.06 >15 Nf4 0.09 >15 Rb1 0.28 >16 Rb1 0.38 >17 Rb1 0.39 >debug file of the last iterations > >26690 <first : 11 1 1862 3196231 e1b1 b2b7 b1a1 b7b4 c3e2 f8e7 f2f3 g8f7 g1f2 >b4b2 f2e3 >32960 <first : 11 1 2489 4230954 e1b1 b2b7 b1a1 b7b4 c3e2 f8e7 f2f3 g8f7 g1f2 >b4b2 f2e3 >38720 <first : 12 -10 3065 5232932 e1b1 b2b7 b1a1 b7b4 c3e2 a8b7 h3f4 f8e7 g1f1 >g8f7 f4d3 b4b3 >43560 <first : 12 -9 3549 6069001 h3f4 >59210 <first : 12 1 5114 8756674 h3f4 g8f7 f4g6 f8e7 g6e7 f7e7 e1b1 b2c2 b1b3 >f5f4 c3e4 c2c1 g1h2 c1c2 >67610 <first : 12 1 5954 10232964 h3f4 g8f7 f4g6 f8e7 g6e7 f7e7 e1b1 b2c2 b1b3 >f5f4 c3e4 c2c1 g1h2 c1c2 >92770 <first : 13 3 8470 14360321 h3f4 g8f7 f4g6 f8e7 g6e7 f7e7 e1b1 b2c2 b1b3 >c2c1 g1h2 c1c2 f2f4 c2d2 b3b8 >120180 <first : 13 3 11211 19117161 h3f4 g8f7 f4g6 f8e7 g6e7 f7e7 e1b1 b2c2 b1b3 >c2c1 g1h2 c1c2 f2f4 c2d2 b3b8 >194770 <first : 14 6 18670 31127474 h3f4 g8f7 f4g6 f8e7 g6e7 f7e7 e1b1 b2c2 b1b3 >c2c1 g1h2 c1c2 h2h3 c2f2 b3b8 f2c2 b8a8 c2c3 h3h4 >246560 <first : 14 6 23849 39600759 h3f4 g8f7 f4g6 f8e7 g6e7 f7e7 e1b1 b2c2 b1b3 >c2c1 g1h2 c1c2 h2h3 c2f2 b3b8 f2c2 b8a8 c2c3 h3h4 >519870 <first : 15 9 51180 84420162 h3f4 g8f7 f4g6 b2c2 e1b1 c2c3 b1b8 f8e7 b8a8 >c3d3 a8a7 d3d4 g6e7 d4d1 g1h2 f7e7 a7a6 >549200 <first : 15 10 54113 89629755 e1b1 >598690 <first : 15 28 59062 98273594 e1b1 b2b7 b1b7 a8b7 c3d1 f8e7 d1e3 e7d8 >e3c4 d8e7 g1f1 g8h7 f1e2 h7g7 h3f4 g7f7 >636040 <first : 15 28 62797 104223230 e1b1 b2b7 b1b7 a8b7 c3d1 f8e7 d1e3 e7d8 >e3c4 d8e7 g1f1 g8h7 f1e2 h7g7 h3f4 g7f7 >703930 <first : 16 38 69586 116541501 e1b1 b2b7 b1b7 a8b7 c3d1 f8e7 d1e3 e7d8 >e3c4 d8e7 g1f1 b7a8 h3f4 e7g5 f4g6 g8f7 c4d6 f7g7 >746160 <first : 16 38 73809 123235257 e1b1 b2b7 b1b7 a8b7 c3d1 f8e7 d1e3 e7d8 >e3c4 d8e7 g1f1 b7a8 h3f4 e7g5 f4g6 g8f7 c4d6 f7g7 >909730 <first : 17 39 90166 152019119 e1b1 b2b7 b1b7 a8b7 c3d1 f8e7 d1e3 g8g7 >g1f1 g7h8 f1e2 h8g8 e3c4 g8g7 e2d2 g7f7 d2d3 f7g7 >1006450 <first : 17 39 99838 167881595 e1b1 b2b7 b1b7 a8b7 c3d1 f8e7 d1e3 g8g7 >g1f1 g7h8 f1e2 h8g8 e3c4 g8g7 e2d2 g7f7 d2d3 f7g7 > >Uri
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