Author: Dan Ellwein
Date: 19:54:14 07/29/04
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 CM9_chesgek (chess geek) finds Qxe6+ with a positive score in 8:13 min... P3/850 Time Depth Score Positions Moves 0:00 1/3 -0.75 3637 1.Ng5 Nxd4 2.Nxe6 axb2 3.Nxd4 Qxc3 0:00 1/3 -0.42 4190 1.Qxe6+ Bf7 2.Qd7 axb2 3.Kxb2 0:00 1/3 -0.31 5917 1.Bb5 axb2 2.Qxe6+ Bf7 0:00 1/4 -0.75 10791 1.Bb5 axb2 2.Qxe6+ Bf7 3.Qd7 Qa1+ 4.Kc2 0:00 1/4 -0.72 36847 1.Qh5 axb2 2.Bxg6 Qa1+ 3.Kc2 0:01 1/5 -1.03 100073 1.Qh5 axb2 2.Bxg6 Qa1+ 3.Kc2 Nxd4+ 4.Kd2 Nb3+ 5.Ke1 Bxg6 6.Rxg6+ Kh8 0:01 1/5 -0.83 109943 1.Qxe6+ Bf7 2.Qd7 axb2 3.Na2 Qa4 4.Re1 0:03 1/6 -1.44 271515 1.Qxe6+ Bf7 2.Qd7 axb2 3.e6 Qa1+ 4.Kc2 Nxd4+ 5.Nxd4 Rxc3+ 6.Kd2 Rxd3+ 7.Rxd3 Qxd1+ 8.Kxd1 b1=Q+ 9.Ke2 0:04 1/6 -0.75 403109 1.Qh5 axb2 2.Bxg6 Qa1+ 3.Kc2 Nxd4+ 4.Kd2 Nb3+ 5.Ke1 Bxg6 6.Rxg6+ Kh8 7.Qh6 0:14 1/7 -2.32 1244803 1.Qh5 axb2 2.Bxg6 Qa1+ 3.Kc2 Bxg6+ 4.Rxg6+ Kh8 5.Kd2 Bb4 6.Qh6 Bxc3+ 7.Ke3 Qc1+ 8.Kf2 0:16 1/7 -1.44 1466204 1.Qxe6+ Bf7 2.Qd7 axb2 3.e6 Qa1+ 4.Kc2 Nxd4+ 5.Nxd4 Rxc3+ 6.Kd2 Rxd3+ 7.Rxd3 Qxd1+ 8.Kxd1 b1=Q+ 9.Ke2 0:25 1/7 -0.86 2267559 1.f5 axb2 2.fxg6 Qa1+ 3.Kc2 Nxd4+ 4.Nxd4 Rxc3+ 5.Kd2 Rxd3+ 6.Rxd3 Bb4+ 7.Ke2 b1=Q 8.Rxb1 Qxb1 9.Qxe6+ Kh8 10.g7+ Kxg7 0:59 1/8 -0.80 5188602 1.f5 axb2 2.fxg6 Qa1+ 3.Kc2 Nxd4+ 4.Kd2 b1=N+ 5.Nxb1 Nxf3+ 6.Rxf3 Qb2+ 7.Ke1 Qxe5+ 8.Kf1 h6 9.g7 Rxf3+ 10.gxf3 Qe3 2:38 1/9 -1.01 13957422 1.f5 exf5 2.Bxf5 Rb8 3.Nxd5 Rxb2+ 4.Kc1 Rxf5 5.Qxf5 Qxd5 6.Rd2 Qc4+ 7.Rc2 Nxd4 8.Rxc4 Nxf5 6:55 1/10 -1.10 37388866 1.f5 exf5 2.Bxf5 Rb8 3.Nh4 axb2 4.Be6+ Kh8 5.Nf5 Qa1+ 6.Kc2 h5 7.Qf4 8:13 1/10 1.05 45097424 1.Qxe6+ Bf7 2.Bxg6 Bxe6 3.Bxh7+ Kh8 4.Rh1 a2+ 5.Nxa2 Bh3 6.Rhxh3 Bh4 7.Rxh4 Nxd4 13:46 1/11 2.10 76081511 1.Qxe6+ Bf7 2.Bxg6 Bxe6 3.Bxh7+ Kh8 4.Rh1 Bh4 5.Rxh4 Rxf4 6.Rxf4 Rb8 7.Nd1 axb2 8.Nxb2 best regards, Dan
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