Author: Ed Schröder
Date: 04:02:26 01/15/00
Go up one level in this thread
On January 13, 2000 at 08:00:31, Amir Ban wrote: >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 You are right, there is no tactical win at all after 27... c5 (which is a good move BTW). Again NO tactical example which would prove the superiority of the Hsu chip. So far I have seen none. Am I mistaken? The remaining question and that is for Bob to answer, if 27... c5 gives a +2 score then all the remaining DT-II moves after 27...c5 would have been +2 at least. If not I agree this must have been a bug. Ed
This page took 0.01 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.