Author: Uri Blass
Date: 22:46:54 07/28/04
Go up one level in this thread
On July 28, 2004 at 17:39:10, John Merlino wrote: >On July 28, 2004 at 16:03:53, Kurt Utzinger wrote: > >>How fast does your engine find the winning move 24.Bxg6 >>but showing a positive score? Below the output of Crafty 19.15 >> >>24.Bxg6!! >>[D]2r2rk1/p3bb1p/2n1Q1p1/q2pP3/3P1P2/p1NB1NR1/1P4P1/1K1R4 w - - 0 24 >> >>[Event "New York"] >>[Site "New York"] >>[Date "1947.??.??"] >>[Round "?"] >>[White "Evans, L."] >>[Black "Pilnick, C."] >>[Result "1-0"] >>[ECO "C13"] >>[PlyCount "57"] >>[EventDate "1947.??.??"] >> >>1. e4 e6 2. d4 d5 3. Nc3 Nf6 4. Bg5 Be7 5. Bxf6 Bxf6 6. e5 Be7 7. Qg4 O-O 8. >>O-O-O c5 9. h4 cxd4 10. Nce2 Nc6 11. f4 Qa5 12. Kb1 d3 13. cxd3 Bd7 14. Rh3 >>Rac8 15. Rg3 g6 16. d4 b5 17. h5 Nb4 18. a3 Nc6 19. hxg6 fxg6 20. Nc3 b4 21. >>Bd3 Be8 22. Nf3 bxa3 23. Qxe6+ Bf7 24. Bxg6 axb2 25. Bxh7+ Kh8 26. Qh6 Qa1+ 27. >>Kc2 b1=Q+ 28. Rxb1 Nb4+ 29. Kd1 1-0 > >This position was posted several weeks ago, and resulted in a small article by >GM Evans in Chess Life. > >The original test position was to find 23.Qxe6+ with a winning score. That was >VERY difficult, and I don't know if any engine will be able to do it in under 10 >minutes. > >jm Finding Qe6 with positive score in less than 10 minutes does not seem to me extremely hard task for the top engines Even weak movei on slow hardware almost can do it in analysis mode. depth=12 +0.08 g4e6 e8f7 d3g6 f7e6 g6h7 g8h8 d1h1 e7h4 h7d3 e6h3 f3h4 c6e5 d4e5 a3a2 b1a1 Nodes: 80220868 NPS: 125266 Time: 00:10:40.40 Note that movei usually search near 500 Knodes on A3000 I am not sure if I can reproduce this result because movei analyzed another position earlier so it may have initial different order of pieces that can give different number of nodes but I do not expect a big difference. I will try later on fast hardware without previous analysis after I stop the match between movei and Jonny. Uri
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