Author: Howard Exner
Date: 14:02:24 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. I agree that Bg5 is better than Bc4, but I also think that black should win even after Bg5. Black should be able to contest the c8 - h3 diagonal with the bishop. Here is a sample line: 1. Bg4 Bf1 2. Bf5 Bxg2 3. Be6 Bf1 4. Bf5 Kd5 5. Bd7 Ba6 6. Kb3 Bb7 7. Kc3 Bc6 8. Bc8 Bb5 9. Bf5 Ke5 10. Bc8 Kd6 11. Bf5 Bd7 12. Bxe4 Bxh3 13. Kd2 Ke5 14. Bc6 Be6 15. Bf3 Bf5 16. Bg2 h3 17. Bxh3 (Bringer would need 6 min on a PII 300 to avoid Bc4 :-( ) > > >Position from Crafty 16.11 - Bringer 1.4 > >8/6pk/2B1N2p/5p2/5P2/3K2n1/8/8 b - - 0 1 > >43. ... g5 would be an easy draw, does any program see this move (BTW, Bringer >played Kg6 and h5 and lost) > > >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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