Author: Kees van Iersel
Date: 03:20:44 11/21/00
Go up one level in this thread
On November 20, 2000 at 22:42:22, Robert Hyatt wrote: >On November 20, 2000 at 22:05:12, Eduard Nemeth wrote: > >>Gambit Tiger 1.0 (i think chess Tiger 13.0 too) can not mates with Bishop and >>Knight! >> >>I played from this FEN-Position a game with 1 minutes/move and play end draw ! >> >>I can this not right belived, but it is true ! See, and test youself: >> >>[D]8/8/8/3B4/8/2K1N3/8/k7 w - - 0 1 >> >>[Event "Test mates with N+B"] >>[Site "My Town P600"] >>[Date "2000.11.21"] >>[Round "1"] >>[White "Gambit Tiger 1.0"] >>[Black "Eduard Nemeth"] >>[Result "1/2-1/2"] >>[Level " 1 Minute/move"] >>[Opening "Not"] >>[FEN: 8/8/8/3B4/8/2K1N3/8/k7 w - - 0 1] >> >>Here the notation on my P600, hash 48 MB : >> >>1. Be4 Ka2 2. Nc4 Ka1 3. Nd6 Ka2 4. Nb5 Ka1 5. Nd4 Ka2 6. Bf5 Ka1 7. Nf3 Ka2 >>8. Ne5 Ka1 9. Be4 Ka2 10. Bd5+ Kb1 11. Nd3 Ka1 12. Be4 Kb1 13. Kb3 Ka1 14. Kc2 >>Ka2 15. Nb2 Ka1 16. Nc4 Ka2 17. Bc6 Ka1 18. Ne5 Ka2 19. Be4 Ka1 20. Nf3 Ka2 >>21. Nd4 Ka1 22. Kc1 Ka2 23. Bd5+ Ka3 24. Nc6 Ka4 25. Bc4 Ka3 26. Kc2 Ka4 27. >>Kc3 Ka3 28. Bb5 Ka2 29. Kc2 Ka1 30. Bd3 Ka2 31. Bc4+ Ka1 32. Kc3 Kb1 33. Ne5 >>Ka1 34. Nf3 Kb1 35. Kb3 Ka1 36. Bd5 Kb1 37. Be4+ Ka1 38. Bc6 Kb1 39. Bd5 Ka1 >>40. Bb7 Kb1 41. Bc6 Ka1 42. Kc2 Ka2 43. Ne5 Ka1 44. Nc4 Ka2 45. Bf3 Ka1 46. >>Kb3 Kb1 47. Nd2+ Ka1 48. Ne4 Kb1 49. Kc3 Ka1 50. Nf6 Ka2 1/2-1/2 >> >>Oh, draw. sorry but I'm "now" shocked ! >> >>Eduard > > >First, it is a mate in 20: > >1. Nc2+ Kb1 2. Bg8 Kc1 3. Ba2! Kd1 4. Nd4! Ke1! 5. Bd5 Kd1 6. Be4! >Kc1! 7. Nb3+ Kd1 8. Bf3+ Ke1 9. Kd3! Kf2! 10. Nd4! Kf1 11. Ke3! Ke1! >12. Ne6 Kf1 13. Nf4! Ke1! 14. Bh5 Kf1 15. Be2+! Kg1! 16. Kf3! Kh2! >17. Kf2! Kh1 18. Kg3! Kg1 19. Nh3+! Kh1 20. Bf3# > > >The main question is, did Christophe depend on tablebases to solve this? Others >have done this in the past. IE I believe that Nimzo had problems with simple >mates like KR vs K in the past, because the author assumed that basic table- >base files would be available, and by taking out the redundant chess knowledge, >the program became simpler and faster overall... > >It might be a case that is frequently over-worked here. Playing engines without >a book? Perhaps the author doesn't test like that and didn't choose to write >code to handle it. Playing without any EGTBs? Same issue. Playing Nunn >tests? Perhaps the program doesn't like some of the positions, and since the >author hand-crafted a book that wouldn't reach some of those positions, it >really doesn't matter. > >Lots of things an author has to choose to include or exclude. I would >personally assume that everyone would now use all the 3-4-5 piece files since >they require 7.5 gigs of disk, and that is dirt-cheap at today's DASDI prices. I am not sure but i believe Gambit Tiger cannot use endgame tables Kees
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