Author: Hristo
Date: 08:48:32 04/14/99
Go up one level in this thread
On April 14, 1999 at 02:47:50, Paulo Soares wrote: >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 > >Hristo, > > Fritz5.32, Hiarcs7.01 and Genius6 don't see the >mate in a PII-300, after 26. ...Qe7, in less of 4min 30". > After 26. ...Qe7 27. Qg4 f6: > Fritz5.32..... 5" > Hiarcs7.01....20" > Genius6.......71" > >Regards, > >Paulo Soares, from Brazil Thanks Paulo! It is interesting to see that. Since 26. ...f6 is forced by Qg4 so this position shouldn't create too many branches, and the mate after that is relatively simple (Bg6 and then just check, check, check ... mate). regards. Hristo
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.