Author: Robert Hyatt
Date: 21:19:38 01/19/01
Go up one level in this thread
On January 19, 2001 at 16:52:19, Thomas Lagershausen wrote: >On January 19, 2001 at 16:34:05, Robert Hyatt wrote: > >>On January 19, 2001 at 15:31:11, Thomas Lagershausen wrote: >> >>>In the following game white has a winning knightsacrifice after the important >>>pawnmoves 15.b4! and 16.b5!.Is a program able to find the plan? >>> >>>[Event "40/120"] >>>[Site "?"] >>>[Date "1992.11.25"] >>>[Round "4"] >>>[White "Lagershausen"] >>>[Black "Fidelity Avantgard#6"] >>>[ECO "A21"] >>>[Result "1-0"] >>> >>>1. c4 e5 2. Nc3 Nc6 3. Nf3 d6 4. d4 Bg4 5. d5 Nce7 6. e4 >>>Ng6 7. Be2 Nf4 8. Bxf4 exf4 9. Nd4 Bd7 10. Bg4 Ne7 11. O-O >>>Qc8 12. Bxd7+ Qxd7 13. Qb3 O-O-O 14. Qa3 Kb8 15. b4 g6 >>>16. b5 Bg7 17. Nc6+ bxc6 18. bxc6 Nxc6 19. Rab1+ Ka8 >>>20. Nb5 Bd4 21. dxc6 Qxc6 22. Nxd4 Qd7 23. Qa6 c5 24. Nb5 >>>Rb8 25. Nc3 f5 26. Nd5 fxe4 27. Nb6+ Rxb6 28. Rxb6 Qc8 >>>29. Qa4 Qe8 30. Qxe8+ Rxe8 31. Rxd6 1-0 >>> >>>Greetings >>>Thomas >> >> >>Takes my program 25 seconds to find this move. I suspect others will be >>even faster: > >The question is how long takes your programe to find the strong moves 15.b4! and >16.b5!.That was my question. >> >> (2) 9-> 4.22 0.26 17. Nde2 Qg4 18. f3 Qg5 19. c5 Rhe8 >> 20. cxd6 Rxd6 21. Rac1 f6 <HT> >> 10 9.38 0.04 17. Nde2 f3 18. gxf3 Qh3 19. Ng3 f5 >> 20. c5 f4 21. cxd6 Rxd6 22. Nge2 Qxf3 >> 10 22.08 0.37 17. Nce2 Rde8 18. c5 dxc5 19. Qxc5 >> Nc8 20. f3 f5 21. exf5 Rxe2 22. Nxe2 >> Bxa1 23. Rxa1 Qxf5 >> 10 25.56 ++ 17. Nc6+!! >> 10 33.34 2.04 17. Nc6+ Nxc6 18. bxc6 bxc6 19. Rab1+ >> Ka8 20. Qa6 Rb8 21. dxc6 Qe6 22. Nb5 >> Rxb5 23. Qxb5 Qxe4 >> (3) 10-> 33.34 2.04 17. Nc6+ Nxc6 18. bxc6 bxc6 19. Rab1+ >> Ka8 20. Qa6 Rb8 21. dxc6 Qe6 22. Nb5 >> Rxb5 23. Qxb5 Qxe4 >> 11 39.53 ++ 17. Nc6+!! >> 11-> 47.39 2.43 17. Nc6+ Nxc6 18. bxc6 bxc6 19. Rab1+ >> Ka8 20. Qa6 Rb8 21. dxc6 Qe6 22. Nb5 >> Rxb5 23. Qxb5 Qxe4 >> 12 1:14 2.65 17. Nc6+ Nxc6 18. bxc6 Qg4 19. h3 Qc8 >> 20. cxb7 Kxb7 21. Rab1+ Ka8 22. Nb5 >> Qb7 23. Nxd6 Rxd6 24. Rxb7 Kxb7 25. >> Rb1+ <HT> >> 12-> 1:14 2.65 17. Nc6+ Nxc6 18. bxc6 Qg4 19. h3 Qc8 >> 20. cxb7 Kxb7 21. Rab1+ Ka8 22. Nb5 >> Qb7 23. Nxd6 Rxd6 24. Rxb7 Kxb7 25. >> Rb1+ <HT> OK... Crafty will play b4 in reasonable time. IE 30 seconds or so on my quad. It doesn't play b5 automatically as there are other moves that lead to the same theme and it might be that after b5, Bg7 isn't the best reply. Crafty wants to play b4 and c5 for example... rather than b4 and b5...
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