Author: Thomas Lagershausen
Date: 16:35:50 01/19/01
Go up one level in this thread
On January 19, 2001 at 19:29:43, Thomas Lagershausen wrote: >On January 19, 2001 at 19:17:46, Thomas Lagershausen wrote: > >>On January 19, 2001 at 19:07:12, Dann Corbit wrote: >> >>>On January 19, 2001 at 18:30:14, Dann Corbit 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 >>>> >>>>Here is the position in question: >>>>[D]1k1r1b1r/pppqnppp/3p4/3P4/2PNPp2/Q1N5/PP3PPP/R4RK1 w - - bm b4; >>> >>>Crafty would pick b4 on a fast machine at tournament time controls: >> >>But he fails to find the right intention of 15.b4.To have the winning sacrifice >>17.Nc6+ white needs to play 16.b5 to open the b-file and have a pawn on c6.After >>the best defence 16..Ka8! white improves his position with Rab1 and the idear >>Rb4 and Ra4. > >Maybe i have a shorter win for white after 16..Ka8! >Here is the analysis by Yace 0.99: > 6.01 0:00 +0.66 17.Sce2 Lg7 18.Df3 Lxd4 19.Sxd4 g5 20.Dh5 f6 21.Df7 >(156.381) 212.4 > 7.01 0:01 +0.66 17.Sce2 Lg7 18.Df3 Lxd4 19.Sxd4 g5 20.Dh5 f6 21.Df7 >(220.841) 209.3 > 7.38 0:01 +0.66 17.Sce2 Lg7 18.Df3 Lxd4 19.Sxd4 g5 20.Dh5 f6 21.Df7 >(361.188) 226.7 > 8.01 0:02 +0.64 17.Sce2 Lg7 18.Df3 Le5 19.Tad1 g5 20.Td3 g4 (528.731) 230.7 > 8.38 0:03 +0.64 17.Sce2 Lg7 18.Df3 Le5 19.Tad1 g5 20.Td3 g4 (949.688) 242.4 > 9.01 0:07 +0.64 17.Sce2 Lg7 18.Df3 Le5 19.Tad1 g5 20.Dd3 g4 21.Tfe1 >(1.794.762) 237.5 > 9.38 0:13 +0.64 17.Sce2 Lg7 18.Df3 Le5 19.Tad1 g5 20.Dd3 g4 21.Tfe1 >(3.454.966) 257.8 > 10.01 0:24 +0.67 17.Sce2 Lg7 18.Df3 Le5 19.Tad1 g5 20.Dh5 Lxd4 21.Sxd4 f6 >22.Df7 (5.970.095) 246.3 > 10.15 0:38 +0.68++ 17.Sc6 Sxc6 18.bxc6 bxc6 19.Da6 cxd5 20.Tab1 c6 21.Sa4 >Tb8 22.Txb8+ Kxb8 23.Tb1+ Db7 24.Txb7+ Ka8 (9.804.654) 251.6 > 10.15 0:41 +1.04++ 17.Sc6 Sxc6 18.bxc6 bxc6 19.Da6 cxd5 20.Tab1 c6 21.Sa4 >Tb8 22.Txb8+ Kxb8 23.Tb1+ Db7 24.Txb7+ Ka8 (10.373.319) 250.9 > 10.01 0:43 +0.94 17.Sc6 Sxc6 18.bxc6 bxc6 19.Da6 Lg7 20.dxc6 Dc8 21.Sb5 Db8 >22.Da5 Tc8 23.Tab1 (10.839.242) 251.7 > 10.38 0:46 +0.94 17.Sc6 Sxc6 18.bxc6 bxc6 19.Da6 Lg7 20.dxc6 Dc8 21.Sb5 Db8 >22.Da5 Tc8 23.Tab1 (11.726.756) 250.6 > 11.01 0:55 +1.34++ 17.Sc6 Sxc6 18.bxc6 bxc6 19.Da6 Lg7 20.Tab1 Tb8 21.dxc6 >Dc8 22.Sb5 Dd7 23.cxd7 Tbg8 (13.992.009) 253.3 > 11.01 1:26 +1.87 17.Sc6 bxc6 18.bxc6 Sxc6 19.Sb5 Dc8 20.dxc6 Db8 21.Da5 Tc8 >22.Tab1 Db6 23.Dc3 Le7 24.Sxd6 (21.625.897) 251.2 > 11.38 1:31 +1.87 17.Sc6 bxc6 18.bxc6 Sxc6 19.Sb5 Dc8 20.dxc6 Db8 21.Da5 Tc8 >22.Tab1 Db6 23.Dc3 Le7 24.Sxd6 (23.344.728) 253.9 > 12.01 2:11 +2.27++ 17.Sc6 bxc6 18.bxc6 Sxc6 19.Sb5 Dc8 20.dxc6 Db8 21.Tab1 >Db6 22.Sxc7+ Dxc7 23.Tb7 Dxb7 24.cxb7+ Kb8 (32.493.457) 246.9 > 12.01 2:46 +2.81 17.Sc6 Sxc6 18.bxc6 bxc6 19.Tab1 Lg7 20.Da6 Tb8 21.dxc6 Dc8 >22.Sb5 Txb5 23.Dxb5 a6 24.Db7+ Dxb7 25.cxb7+ Kb8 26.Tfd1 (41.679.848) 250.7 > 12.38 2:54 +2.81 17.Sc6 Sxc6 18.bxc6 bxc6 19.Tab1 Lg7 20.Da6 Tb8 21.dxc6 Dc8 >22.Sb5 Txb5 23.Dxb5 a6 24.Db7+ Dxb7 25.cxb7+ Kb8 26.Tfd1 (44.381.954) 254.3 > 13.01 4:05 +2.70 17.Sc6 Sxc6 18.bxc6 bxc6 19.Tab1 Lg7 20.Da6 Tb8 21.dxc6 Dc8 >22.Sb5 Txb5 23.Dxb5 a6 24.Db7+ Dxb7 25.cxb7+ Kb8 26.Tfd1 Te8 (63.900.011) 259.8 > 13.38 4:37 +2.70 17.Sc6 Sxc6 18.bxc6 bxc6 19.Tab1 Lg7 20.Da6 Tb8 21.dxc6 Dc8 >22.Sb5 Txb5 23.Dxb5 a6 24.Db7+ Dxb7 25.cxb7+ Kb8 26.Tfd1 Te8 (73.712.149) 265.5
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