Author: Alvaro Rodriguez
Date: 08:13:04 08/13/00
Go up one level in this thread
On August 13, 2000 at 10:59:22, pete wrote: >For my personal pleasure I have played a little match Crafty-Tiger, both without >opening book and tablebases , Time control 40 in 40 ; Tiger on a PIII500 , >Crafty on 4 Ultra-Sparc 450 CPUs . > >Two interesting positions : > >a.) > >[D]3r1rk1/2p1Rppp/p4n2/1p1b4/3P4/3B3P/PPPN2P1/4R1K1 b - - 0 1 > >Here Tiger played what seems to be the decisive mistake 21. ... Bxa2 ?? > >This is an interesting move IMHO as the bishop doesn't get lost at all , it >simply can't participate in the game anymore ; in fact it lasts until the 46th >move when white finally wins the bishop . It seems to me without special code it >is impossible to avoid this ( for example Fritz 6a would play like that too) . > >Is it possible to survive after Bxa2 ? Which programs will avoid Bxa2 ? When you say that the bishop doesn´t ge lost, in fact it does, because the bishop don´t have a good square to move!! It´s not participating in the game at all, and white is a piece down.. It´s interesting to see what other programs play... I think this move is slightly more interesting then the other game, because this is certainly a losing move IMO.. Regards, Alvaro > >The complete game : > >Tournament: 40 in 40 >Date: 13/8/2000 >White: Crafty 17.12 >Black: Chess Tiger 12.0e >Opening: French ( Exchange) > >1. e4 e6 2. Nf3 d5 3. exd5 exd5 4. d4 Bd6 5. Nc3 Nf6 6. Bd3 Qe7+ 7. Be3 Bf4 8. >Qe2 Bxe3 9. Qxe3 Qxe3+ 10. fxe3 a6 11. e4 dxe4 12. Nxe4 Nxe4 13. Bxe4 0-0 14. >0-0 Nd7 15. Rae1 Nf6 16. Bd3 Bd7 17. Re5 Rad8 18. Rfe1 Be6 19. h3 Bd5 20. Nd2 b5 >21. Re7 Bxa2 22. b3 Nd5 23. R7e4 Nb4 24. Ra1 f5 25. Rf4 g6 26. Bf1 c5 27. c4 >Rxd4 28. Rxd4 cxd4 29. cxb5 axb5 30. Bxb5 Kg7 31. Kf2 Rb8 32. Bc4 Rb6 33. Re1 >Kf8 34. Re5 h6 35. h4 h5 36. Kf3 Kg7 37. Re7+ Kh6 38. Kf4 Rb8 39. Nf3 Nc6 40. >Rd7 Re8 41. Rc7 Re4+ 42. Kg3 Ne7 43. Nd2 Re3+ 44. Kf4 Re1 45. Ra7 Bb1 46. Nxb1 >Nc6 47. Rc7 Re4+ 48. Kg3 Ne5 49. Nd2 Rg4+ 50. Kh3 g5 51. hxg5+ Kxg5 52. Rc5 Kf4 >53. Nf1 Nxc4 54. Rxc4 Ke5 55. Nd2 Kd5 56. Rc8 Kd6 57. Rh8 Rg6 58. Nf3 Rg4 59. >Rxh5 d3 60. Rxf5 Rb4 61. Nd2 Kc6 62. g4 Kd6 63. g5 Ke6 64. Rf3 Rd4 65. g6 Ke7 >66. g7 Rd8 67. b4 Rg8 68. Rg3 Kf6 69. b5 Ke5 70. b6 Kd6 71. Rg6+ Kd7 72. Nc4 d2 >73. Nxd2 Kd8 74. Ne4 Ke7 75. Kg4 Ke8 76. Nf6+ Kf7 77. Kf5 Rxg7 78. Rxg7+ Kxg7 >79. b7 Kf7 80. b8Q Ke7 81. Ke5 Kf7 82. Qg8+ Ke7 83. Qe8# >1-0 > >b.) > >The second game shows Tiger with superior ability to live without opening book ( >quite ugly setup by Crafty ) and getting the advantage . Until > >[D]r1b1rbk1/1pp2pp1/2n1q2p/1B1pPp2/2PP4/5N2/PBQ2PPP/R3R1K1 w - - 0 1 > >Here Tiger played 18. c5 ? > >This looks like a severe positional mistake , weakening own black-coloured >bishop and even worse giving up the tension in the centre and so the chances for >advantage vanish ( Game evened out to draw soon ) . > >Tiger seems to have problems understanding the pawn structure here ( I have >observed similar choices by it before , one posted last week if memory serves me >well ) . This position seems to be Tiger-specific , other programs have no >problem here it seems . > >The complete game : > >Tournament: 40 in 40 >Date: 13/8/2000 >White: Chess Tiger 12.0e >Black: Crafty 17.12 >Opening: Nimzowitch > >1. e4 Nc6 2. d4 d5 3. e5 e6 4. c3 Nge7 5. Bd3 Nf5 6. Nf3 Be7 7. 0-0 0-0 8. Qc2 >h6 9. Nbd2 a5 10. Re1 a4 11. Nf1 Qd7 12. Ne3 Re8 13. Nxf5 exf5 14. Bb5 a3 15. >bxa3 Bxa3 16. c4 Bf8 17. Bb2 Qe6 18. c5 Bd7 19. a4 g6 20. Bc3 Bg7 21. Qb3 Ra7 >22. Nd2 b6 23. cxb6 cxb6 24. Rab1 Rc8 25. Rbc1 Rac7 26. Qb2 Na7 27. Ba6 Rb8 28. >Bb4 Rxc1 29. Rxc1 b5 30. Bd6 Rb6 31. axb5 Nxb5 32. Bxb5 Rxb5 33. Qa3 Qe8 34. Rc7 >Rb6 35. Ra7 Rc6 36. h3 Rc2 37. Nf1 Be6 38. Ne3 Rc8 39. Ra5 Qc6 40. Bc5 Qb7 41. >Kh2 Qb1 42. Qb4 Qe4 43. Ra3 Qh4 44. Kg1 Kh7 45. Nf1 Qe4 46. Ra7 f4 47. f3 Qc2 >48. Ra5 Qc4 49. Nd2 Qxb4 50. Bxb4 f6 51. Bd6 fxe5 52. dxe5 Re8 53. Ra1 Bf5 54. >Ra5 Bxe5 55. Rxd5 Bxd6 56. Rxd6 g5 57. Kf2 Re3 58. Nc4 Rc3 59. Ne5 Rc2+ 60. Kg1 >Re2 61. Nc6 Re6 62. Rd7+ Kg6 63. Ne7+ Kf6 64. Nxf5 Kxf5 65. Kh2 Re5 66. h4 gxh4 >67. Kh3 Kg5 68. Rg7+ Kh5 69. Rg4 Re1 70. Rxh4+ Kg5 71. Rg4+ Kf5 72. Kh2 h5 73. >Rg8 Kf6 74. Rf8+ Kg5 75. Rd8 Re2 76. Rg8+ Kh4 77. Rf8 Kg5 78. Rh8 Rb2 79. Re8 >Ra2 80. Kh3 >1/2-1/2 ( adjudicated ) > >Before someone misunderstands me ( as I post Tiger mistakes for the 2nd time now >) : the only reason for this is that I look at it playing a lot at the moment >and it sure is an extremely strong and entertaining program . > >Have fun . > >pete
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