Author: Peter Fendrich
Date: 02:03:19 10/17/01
Go up one level in this thread
On October 16, 2001 at 22:18:12, Robert Hyatt wrote: >On October 16, 2001 at 19:27:56, Dan Andersson wrote: > >>There are some interesting cases here. If you are behind in material and can >>deliver a perpetual, it is interesting to see if you can make a non checking >>move and still have a perpetual on your opponents reply. This situation is not >>too uncommon. If that is the case the evaluation might very well be set higher >>than a draw. The actual scoring might be trickier. One example of that is the >>game Hamarat - Chess Mail Readers. Where many programs will take the draw as >>white due to the material deficit. Instead of improving the position while >>having the draw in hand. The idea of attacking and having a safe out. The game: >> > >This idea has possibilities as well. In cray blitz, we didn't use 0.00 as the >draw score. We blocked out the scores from 0-.1 by inflating the scores beyond >the .1 threshold if they were > 0. This let us return the "ply" of the draw >as the score, which made longer draws look "better" than the shortest draw. >And it worked just like you mention above... "keep the draw in hand" but give >the opponent a chance to blow it... Then there is that Hash thing again where draw values from one ply level is moved to another ply level... Maybe it could be soved in the same manner as mate scores. Kepping track of when it is a draw score and adjust it according to current ply. I think it's doable but I'm not sure if it really gets rid of all the hash problems. //Peter >>1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. f4 e5 7. Nf3 Nbd7 8. a4 >>Be7 9. Bd3 O-O 10. O-O exf4 11. Kh1 Ne5 12. Bxf4 Qc7 13. Nd4 Be6 14. a5 Rac8 15. >>Qd2 Nc4 16. Bxc4 Qxc4 17. Rfe1 Rfe8 18. Ra4 Qc7 19. Nxe6 fxe6 20. e5 dxe5 21. >>Bxe5 Qc5 22. Qe2 Rc6 23. Rd1 Rd8 24. Rf1 Rf8 25. Bd4 Qg5 26. Raa1 Rd8 27. Ra4 >>Rf8 28. Rc4 Rfc8 29. Bxf6 Bxf6 30. Ne4 Qe5! 31. Nxf6+ gxf6 32. Rg4+ Kh8 33. Qxe5 >>fxe5 34. c3 Rc5 35. Rf7 Rxa5 36. h4 Rb5 37. Rgg7 Rxb2 38. Rxh7+ Kg8 39. Rhg7+ >>Kh8 40. Kh2 Rc4 41. Kh3 Rxc3+ 42. g3 e4?! 43. Rd7 e3 44. Rge7 Rc8 45. h5! Rb5 >>46. g4 Rg5 47. Kh4 Rcc5 48. Re8+ Rg8 49. Rxe6 Rg7 50. Rd8+ Kh7 51. Ree8 Rgc7 52. >>Rh8+ Kg7 53. h6+ Kg6 54. Rd6+ Kf7 55. g5 Re5 56. Rf6+ Ke7 57. Rh7+ Ke8 58. Rxc7 >>1-0 >> >>MvH Dan Andersson
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