Author: Vasik Rajlich
Date: 01:14:48 12/20/05
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On December 20, 2005 at 00:56:02, Neil Schemenauer wrote: >I think I've found a bug in Rybka Beta (maybe in Preview as well). >The engine comes up with an invalid PV (0-0-0 when castling is not >possible). It could be a hash-table bug since to reproduce it I >have to start from the beginning of the game using the analysis mode >of the Shredder UI. > >The full game follows. Any comments on my (lack of) style would >appreciated. I was playing against CSTal 2 with "reduce strength" >set to 1, the weakest setting. I managed to win against that >setting for the first time today and this game was one of my wins. >The knight sac was probably not the best idea but I wanted to see if >I could pull it off. Onward to level 50. :-) > > >[D]rn2k2r/ppqbb1pp/3p4/3n2N1/1P3B2/P2B4/2PQ1PPP/R4RK1 b kq - > >Engine: Rybka 1.0 Beta 32-bit (80 MB) >by Vasik Rajlich > >8.00 0:01 +1.48 17...Nc6 18.Bg3 Ne5 19.Ne4 Nf6 (44.744) 25 > >9.00 0:03 +1.58 17...Nc6 18.Bg3 Ne5 19.Bxh7 O-O-O > 20.Qxd5 (100.680) 27 > >10.00 0:08 +1.17 17...Nc6 18.Bg3 Ne5 19.c4 Bxg5 > 20.Qxg5 Nxd3 21.Qxd5 (227.570) 26 > >10.02 0:10 +1.34 17...Nxf4 18.Qxf4 O-O-O 19.Nf7 Rhf8 > 20.b5 d5 (291.442) 29 > >11.01 0:16 +1.64 17...Nxf4 18.Qxf4 O-O-O 19.Rae1 Nc6 > 20.Ne6 Bxe6 21.Rxe6 Bf6 (468.531) 31 > >12.01 0:21 +1.66 17...Nxf4 18.Qxf4 O-O-O 19.Rae1 Nc6 > 20.Ne6 Bxe6 21.Rxe6 Bf6 22.Qe3 (678.258) 32 > > > > >[Event "?"] >[Site "?"] >[Date "2005.12.19"] >[Round "?"] >[White "Neil Schemenauer"] >[Black "CSTal 2"] >[Result "1-0"] > >1. e4 d6 2. d4 e5 3. Nf3 f6 4. Nc3 Nc6 5. d5 Nb4 6. a3 Na6 >7. b4 Bd7 8. Be2 Be7 9. O-O f5 10. Bd3 f4 11. Ne2 Nb8 >12. Nxf4 exf4 13. Bxf4 Nf6 14. e5 Nxd5 15. exd6 cxd6 >16. Qd2 Qc7 17. Ng5 Nf6 18. Rfe1 Nc6 19. c4 Kf8 20. Qc2 Nd4 >21. Qc3 Nf5 22. Ne6+ Bxe6 23. Rxe6 Nh4 24. c5 Qc6 25. f3 >Nxf3+ 26. gxf3 Nh5 27. Be4 Qd7 28. cxd6 Qxe6 29. dxe7+ Qxe7 >30. Be3 Kf7 31. Bd5+ Ke8 32. Re1 Kd8 33. Qd2 Qd7 34. Rd1 >Nf6 35. Bxb7 Qxd2 36. Rxd2+ Kc7 37. Bxa8 Rxa8 38. Bd4 a6 >39. Kg2 Kc6 40. Kg3 Rd8 41. Rc2+ Kd6 42. Bxf6 gxf6 43. Rd2+ >Ke7 44. Rxd8 Kxd8 45. Kg4 Ke7 46. Kf5 Kf7 47. f4 h5 48. a4 >Ke7 49. b5 axb5 50. axb5 Ke8 51. b6 Kd7 52. Kxf6 h4 53. f5 >Kc6 54. Ke7 h3 55. f6 Kxb6 56. f7 Kc5 57. f8=Q Kc4 58. Qf3 >Kb4 59. Qxh3 Kc4 1-0 Thanks. I can reproduce it here, it will be fixed. BTW 12. Nxf4 probably isn't correct :-) Vas
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