Author: Robert Hyatt
Date: 07:18:32 08/31/99
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On August 31, 1999 at 10:02:19, Gerrit Reubold wrote: >Hi all, > >Here are two endgame positions which are easy draws (for humans), however, my >program (Bringer) lost both. Does your programs play better moves? how long do >they take to see the draw? > >Position from Bringer 1.4 - Crafty 16.11, after 155. ... Bb5 > >8/8/2k5/1bp5/4p2p/2K1P2P/4B1P1/8 w - - 0 1 > >How long does your program take to avoid the losing 156. Bc4?? Instead, >sacrificing the g2 pawn with Bg4 and keeping the king on c3 should be an easy >draw. (Bringer would need 6 min on a PII 300 to avoid Bc4 :-( ) > > Crafty seens that Bc4 loses in about 30 seconds on my PII/300 notebook, after getting to depth=18. Score goes from -1.58 to -5.21 at that depth. The quad xeon sees this in 4 seconds however... >Position from Crafty 16.11 - Bringer 1.4 > > - - 0 1 > >43. ... g5 would be an easy draw, does any program see this move (BTW, Bringer >played Kg6 and h5 and lost) > I'll have to try this one on the xeon, but it is busy. It has all the 3 vs 2 endings and may be able to search this to the end. > >The second position leads to the question: how should we evaluate positions like >this: >8/2k5/2n5/8/8/2BN4/2K5/8 w - - 0 1 >Don't tell me "5 pieces EGTBs", because there may be another black pawn, which >wouldn't change a thing. > > >Greetings, >Gerrit
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