Author: Amir Ban
Date: 05:00:31 01/13/00
Go up one level in this thread
On January 13, 2000 at 06:31:20, Ed Schröder wrote: >On January 13, 2000 at 03:48:22, Amir Ban wrote: > >>On January 13, 2000 at 01:14:10, Jeremiah Penery wrote: >> >>>On January 12, 2000 at 16:39:22, Amir Ban wrote: >>> >>>>On January 12, 2000 at 04:44:34, Peter Kappler wrote: >>>> >>>>>On January 11, 2000 at 06:58:28, Robert Hyatt wrote: >>>>> >>>>>>I pointed out one in the first match, in the game DB won, where Kasparov had a >>>>>>mate in 1 for about 10 moves. A subtle rook move made the entire variation >>>>>>work, where the rook move preferred by the micros at the time would have >>>>>>resulted in deep trouble. I don't recall the game now, but I remember that >>>>>>DB was white (again, in match 1 which it lost) and its king was hemmed in on >>>>>>the kingside with Kasparov threatening mate. But he never got to play the >>>>>>mate... >>>>>> >>>>> >>>>>[Event "ACM Chess Challenge"] >>>>>[Site "Philadelphia Convention Center"] >>>>>[Date "96.02.10"] >>>>>[Round "1"] >>>>>[White "Deep Blue"] >>>>>[Black "Kasparov, Garry"] >>>>>[Opening "Alapin Sicilian"] >>>>>[Result "1-0"] >>>>> >>>>>1. e4 c5 2. c3 d5 3. exd5 Qxd5 4. d4 Nf6 5. Nf3 Bg4 6. Be2 e6 7. h3 Bh5 >>>>>8. O-O Nc6 9. Be3 cxd4 10. cxd4 Bb4 11. a3 Ba5 12. Nc3 Qd6 13. Nb5 Qe7 >>>>>14. Ne5 Bxe2 15. Qxe2 O-O 16. Rac1 Rac8 17. Bg5 Bb6 18. Bxf6 gxf6 >>>>>19. Nc4 Rfd8 20. Nxb6 axb6 21. Rfd1 f5 22. Qe3 Qf6 23. d5 Rxd5 24. Rxd5 >>>>>exd5 25. b3 Kh8 26. Qxb6 Rg8 27. Qc5 d4 28. Nd6 f4 29. Nxb7 Ne5 >>>>>30. Qd5 f3 31. g3 Nd3 32. Rc7 Re8 33. Nd6 Re1+ 34. Kh2 Nxf2 35. Nxf7+ >>>>>Kg7 36. Ng5+ Kh6 37. Rxh7+ 1-0 >>>>> >>>>> >>>>>The move Bob referred to is 32. Rc7, which was played by DB in this position. >>>>> >>>>>[D]6rk/1N3p1p/5q2/3Q4/3p4/PP1n1pPP/5P2/2R3K1 w - - >>>>> >>>>>6rk/1N3p1p/5q2/3Q4/3p4/PP1n1pPP/5P2/2R3K1 w - - >>>>> >>>>>If I recall correctly, all of the micros wanted to play 32. Rc6. >>>>> >>>>>--Peter >>>> >>>>Deep Junior wants to play Rc7 after 2:15 minutes. >>> >>>Can you give the line/eval it shows? I'm interested to see it. :) >>>Also, what kind of machine is it running on for this? >>> >>>Thanks. >>> >>>Jeremiah >>>> >>>>Amir >> >>Dual P-II/350 Mhz. >> >>Eval for Rc6 was about +1.2, for Rc7 about +1.5. >> >>Nothing really tactical going on here. Black can and should force queen trade in >>both variants: >> >>1. Rc6 Rg5 2. Qe4 (but not Qc4 ? or Rc8+ ?) Qf4 >> >>1. Rc7 Qe5 (better than Nf4) >> >>The endgame after the queen trade is slightly better for white in the 2nd case. >> >>Amir > >I have the same feeling. The difference between Rc6 and Rc7 is positional >based, no material is involved. I would like to see the complete game of >the Deep Thought game where Deep Thought played the c5 move with a +2 score. >The moves after c5 could help to find the complete main variation that >justifies the +2 score. We then can see how deep DT searched. > >Ed [Event "ACM 1991"] [Site ""] [Date ""] [Round ""] [White "Cray Blitz"] [WhiteElo ""] [Black "Deep Thought II"] [BlackElo ""] [Result "0-1"] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. f4 e5 7. Nxc6 bxc6 8. fxe5 Ng4 9. Be2 Nxe5 10. Be3 Be7 11. O-O Be6 12. Qd4 O-O 13. Rad1 f6 14. b3 Qe8 15. Na4 Qg6 16. Bf4 Rf7 17. Qe3 Raf8 18. Qxa7 Qxe4 19. Bd3 Qb4 20. Qe3 Ra8 21. c3 Qb7 22. Rf2 Qa7 23. Qxa7 Rxa7 24. Be3 Ra5 25. Bb6 Ra8 26. Bc2 Bf8 27. Re1 c5 28. Be4 Ra6 29. Rb1 f5 30. Bc2 Rb7 31. Bd8 g6 32. Re1 c4 33. Rb1 Bd7 34. Nb2 Ra8 35. Bg5 Rxa2 36. b4 Bb5 37. Re2 Bg7 38. Nd1 Ra6 39. Bd2 Nd3 40. Ne3 Ra2 41. Bxd3 cxd3 42. Rf2 Rxd2 43. Rxd2 Bxc3 44. Nf1 Bxd2 45. Nxd2 Re7 46. Nf3 h6 47. Rb2 Re4 48. Kf2 g5 49. g3 f4 50. gxf4 Rxf4 51. Kg3 h5 52. Nd2 h4+ 53. Kg2 Bc6+ 54. Kg1 Rg4+ 55. Kf2 Rg2+ 56. Ke3 Bb5 57. Ra2 Rxh2 58. Ra5 Re2+ 59. Kd4 h3 60. Rxb5 Rg2 61. Rb8+ Kg7 62. Rb7+ Kg6 63. Rd7 0-1 The move in question is 27 ... c5. Black gets material advantage on move 35. So far as I can see, the reason is white's 34'th move, that gives up a pawn for no good reason. White is already in positional trouble before that because of the weak 32. Re1. White can play, for example, 32. Bg5 and remain fine. If Deep Thought said +2 after 27 ... c5 it must have been a bug. Amir
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