Author: Roy Brunjes
Date: 11:27:07 01/26/03
Go up one level in this thread
On January 26, 2003 at 12:40:00, Uri Blass wrote:
>montalivet sacrified a pawn by 8...Bd7.
>I am not sure if the sacrifice was correct but Movei did not find the right
>defence and montalivet got a winning position.
>
>The losing blunder of montalivet was Kc8 when Kd8 seems to lead to a draw.
>Fritz8 with 64 mbytes hash tables needs a long time to find Kd8(Maybe bigger
>hash tables can help it to fins it at smaller depth but I leave it to other
>people to test)
>Crafty19.01 has no probelems to find it.
>
>Here is the game and the analysis of Fritz8.
>
>montalivet is Fritz7(p41800 Mhz) if you believe the notes of it and
>I assume that the notes are correct unless something else is proven.
>
>
>
>[Event "ICS rated standard match"]
>[Site "chessclub.com"]
>[Date "2003.01.26"]
>[Round "-"]
>[White "MoveiXX"]
>[Black "montalivet"]
>[Result "1-0"]
>[WhiteElo "2327"]
>[BlackElo "2533"]
>[TimeControl "900+1"]
>
>1. d4 d5 2. c4 e6 3. c5 Nc6 4. Nc3 e5 5. e3 Nge7 6. Bb5 a6 7. Ba4 e4 8. Qb3
>Bd7 9. Qxb7 Rb8 10. Qxa6 Nb4 11. Bxd7+ Qxd7 12. Qe2 Nd3+ 13. Kd1 c6 14. f3
>Qe6 15. g4 h5 16. gxh5 Qf6 17. h3 Nf5 18. a3 Ng3 19. Qh2 Bd6 20. cxd6 Nxh1
>21. fxe4 Qf1+ 22. Kc2 Nhf2 23. b4 Nxe4 24. h6 g5 25. Nxe4 dxe4 26. Bb2 Qf6
>27. Qg2 Qg6 28. h4 gxh4 29. Qxg6 fxg6 30. Nh3 Rxh6 31. Ng5 Nf2 32. Rf1 Rb5
>33. Ne6 Ng4 34. Kb3 h3 35. a4 Rd5 36. b5 Rxd6 37. b6 Rd7 38. Nc7+ Rxc7 39.
>Rf8+ Kd7 40. Rf7+ Kc8 41. Rxc7+ Kb8 42. a5 Rh5 43. Ka4 h2 44. a6 Rh8 45.
>a7+ Ka8 46. b7+ Kxa7 47. Rc8 Kxb7 48. Rxh8 Kc7 49. Ba3 Kd7 50. Kb4 Kd6 51.
>Kc4+ Kd7 52. Kc5 g5 53. Rh7+ Ke6 54. Kxc6 Kf5
>{montalivet resigns} 1-0
>
>MoveiXX - montalivet
>[D]8/2rk1R2/1Pp3pr/8/P2Pp1n1/1K2P2p/1B6/8 b - - 0 1
>
>Analysis by Fritz 8:
>
>40...Kc8 41.Rxc7+ Kb8 42.a5 Rh5 43.Rxc6 Rxa5 44.Rxg6 Nxe3
> -+ (-1.97) Depth: 7/16 00:00:00 67kN
>40...Kc8--
> -+ (-1.69) Depth: 8/24 00:00:00 99kN
>40...Kc8 41.Rxc7+ Kb8 42.Rg7 h2 43.Ba3 c5
> -+ (-1.66) Depth: 8/29 00:00:00 121kN
>40...Kc8--
> µ (-1.38) Depth: 9/27 00:00:00 157kN
>40...Kc8 41.Rxc7+ Kb8
> µ (-1.38) Depth: 9/34 00:00:00 198kN
>40...Kc8--
> µ (-1.09) Depth: 10/31 00:00:00 330kN
>40...Kc8 41.Rxc7+ Kb8
> µ (-1.09) Depth: 10/39 00:00:01 454kN
>40...Kc8!
> µ (-1.38) Depth: 11/34 00:00:01 761kN
>40...Kc8--
> µ (-1.09) Depth: 12/30 00:00:02 1035kN
>40...Kc8 41.Rxc7+ Kb8 42.a5 Rh5 43.Ka4 Rb5 44.Ba3 Nxe3 45.Rxc6 Rd5 46.Rxg6 Rxd4+
>47.Kb5 Rd2 48.Bd6+
> ³ (-0.66) Depth: 12/50 00:00:06 2901kN
>40...Kc8--
> ³ (-0.38) Depth: 13/40 00:00:08 3765kN
>40...Kc8 41.Rxc7+ Kb8 42.a5 Rh5 43.Ka4 Rb5 44.Ba3 Nxe3 45.Rxc6 Rd5 46.Rxg6 Nc4
>47.Rg8+ Kb7
> = (0.00) Depth: 13/46 00:00:18 8179kN
>40...Kc8 41.Rxc7+ Kb8 42.a5 Rh5 43.Ka4 Rb5 44.Ba3 Nxe3 45.Rxc6 Rd5 46.Rxg6 Nc4
>47.Rg8+ Kb7
> = (0.00) Depth: 14/39 00:00:26 11526kN
>40...Kc8 41.Rxc7+ Kb8 42.d5 h2 43.dxc6 h1Q 44.Rb7+ Kc8 45.Rc7+ Kb8
> = (0.00) Depth: 15/44 00:00:54 23868kN
>40...Kc8 41.Rxc7+ Kb8 42.d5 h2 43.dxc6 g5 44.Rb7+ Kc8 45.Rc7+ Kb8
> = (0.00) Depth: 16/44 00:01:55 52045kN
>40...Kc8--
> ² (0.28) Depth: 17/50 00:05:56 160263kN
>40...Kc8 41.Rxc7+ Kb8 42.a5 h2 43.a6 Rh8 44.Rb7+ Ka8 45.Ra7+ Kb8 46.Ba3 h1Q
>47.Bd6+ Kc8 48.b7+ Kd7 49.b8Q+ Ke6 50.Re7+
> ² (0.37) Depth: 17/62 00:07:41 208665kN
>40...Kd8!
> ² (0.34) Depth: 17/62 00:11:56 326345kN
>40...Kd8!
> = (0.19) Depth: 17/62 00:13:52 379784kN
>40...Kd8 41.Rf8+ Kd7
> = (0.00) Depth: 17/62 00:15:59 438425kN
>
>(Blass, Tel-Aviv 26.01.2003)
>
>
>Uri
CM9000 Personality=Roy2 spots the drawing move 40... Kd8 on my Pentium III 500
MHz laptop in much quicker fashion:
Time Depth Score Positions Moves
0:03 1/9 0.00 193769 40...Kc8 41.Rxc7+ Kb8 42.Rf7 h2
43.Ba3 g5 44.Rf8+ Kb7 45.Rf7+ Kc8
46.Rf8+ Kb7
0:08 1/10 0.00 451165 40...Kc8 41.Rxc7+ Kb8 42.Rf7 h2
43.Ba3 g5 44.Rf8+ Kb7 45.Rf7+ Kc8
46.Rf8+ Kb7
0:19 2/11 0.00 1090868 40...Kc8 41.Rxc7+ Kb8 42.Rf7 h2
43.Ba3 g5 44.Rf8+ Kb7 45.Rf7+ Kc8
46.Rf8+ Kb7
1:08 3/12 0.29 4090984 40...Kc8 41.Rxc7+ Kb8 42.a5 Rh5
43.Ka4 Rb5 44.Ba3 Nxe3 45.Rxc6
Rb1 46.Bd6+ Ka8 47.a6
2:39 3/12 0.00 9575150 40...Kd8 41.Rf8+ Kd7
4:54 4/13 0.00 18180514 40...Kd8 41.Rf8+ Kd7
Also, Roy2 thought that the pawn sac 8... Bd7 was valid, in the sense that it
would also play it. It did give a small plus score to White as a result of the
pawn sac however:
Time Depth Score Positions Moves
0:02 1/7 0.19 88610 8...Rb8 9.Nge2 b5 10.cxb6ep Rxb6
11.Qc2 Bg4 12.O-O
0:02 1/7 0.07 130872 8...g6 9.Nge2 Bg7 10.Bd2 O-O 11.Bxc6
bxc6 12.O-O
0:06 1/8 0.10 290288 8...g6 9.f3 f5 10.Nge2 Bg7 11.Nf4
O-O 12.Ncxd5 Kh8 13.Nxe7 Nxe7
0:09 1/8 0.04 459972 8...Bd7 9.Qxb7 Rb8 10.Qxa6 Nb4
11.Bxd7+ Qxd7 12.Qa7 Nd3+ 13.Kf1
0:14 1/9 0.04 711700 8...Bd7 9.Qxb7 Rb8 10.Qxa6 Nb4
11.Qa5 Nec6 12.Bxc6 Nd3+ 13.Kf1
Bxc6
0:29 1/10 0.07 1493414 8...Bd7 9.Qxb7 Rb8 10.Qxa6 Nb4
11.Bxd7+ Qxd7 12.Qe2 Nd3+ 13.Kf1
g6 14.f3
All played on a Pentium III 500 MHz laptop with 64 MB RAM for hashtables.
Roy
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