Author: John Merlino
Date: 15:16:57 04/14/99
Go up one level in this thread
On April 13, 1999 at 16:36:05, Hristo wrote: > >I played a game against crafty15_20 two nights ago. >Used craftys default settings, with no oppening book or >endgame databases. Without any board representation other >than "d" option on the command line. The computer is P II 450 >with 128 MRam. 180K N/sec > >Why didn't crafty see the mate after 26. ... Qe7 (under normal >conditions, i.e. 2-3min per move)?! How many other >programs don't see that mate? BTW after 26. ... Qe7 17. Qg4 f6 >crafty finds the mate in about 18 sec. >In analize mode it takes something like 30 min or more for crafty to >find that Qe7 leads to mate. > >At what point a program searches for mate instead of material gains? >(I have the crafty code but haven't spend the time to learn it.) > >[Event "?"] >[Site "?"] >[Date "1999.04.12"] >[Round "?"] >[White "Hristo Doichev"] >[WhiteElo ""] >[Black "Crafty 15.20"] >[BlackElo ""] >[Result "1-0"] > >1. e3 e6 2. d4 Nc6 3. c4 Nf6 4. Nf3 Be7 5. Be2 O-O 6. O-O d5 >7. b3 Bd7 8. Bb2 dxc4 9. bxc4 Ng4 10. h3 Nf6 11. Nc3 Qc8 12. e4 >Na5 13. e5 Ne8 14. Qc2 Nc6 15. a3 Na5 16. Bd3 Kh8 17. Rab1 Qd8 >18. d5 exd5 19. cxd5 a6 20. Rfe1 Bc8 21. Rbd1 b6 22. e6 Nd6 >23. Bxh7 Ndc4 24. Ba1 Nxa3 25. Qe4 Bd6 26. Nb1 Qe7 27. Qg4 f6 >28. Bg6 Bf4 29. Qxf4 Qb4 30. Qxb4 Re8 31. Qh4+ Kg8 32. Qh7+ >Kf8 1-0 > > > >hristo Chessmaster 6000, on a P2-300, announces mate in 12 with 27.Qg4 after thinking for 1:04. After thinking for a total of 2:15, it switches to mate in 11. jm
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