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Subject: Re: challenging GM game for programs

Author: bobby palacios

Date: 17:01:07 02/21/03

Go up one level in this thread


On February 21, 2003 at 17:32:33, K. Burcham wrote:

>
>
>Good game to analyse with program. Black got off to bad start with moving pawns
>out early. white closes in for king attack. several good positions in this game.
>black makes several bad moves.
>
>20.Nxd5
> [D] 2kr3r/1q2bpp1/p4np1/1p1p4/2nP1B2/1QNB1PP1/PP5P/1KR4R w - - 0 20
>
>21.Rxc4
> [D] 2kr3r/4bpp1/p4np1/1p1q4/2nP1B2/1Q1B1PP1/PP5P/1KR4R w - - 0 21
>
>
>[Event "Hrokurinn Chess Festival"]
>[Site "Reykjavik Art Museum"]
>[Date "2003.02.19"]
>[Round "2"]
>[White "Korchnoi, Viktor"]
>[Black "Gretarsson, Helgi Ass"]
>[Result "1-0"]
>[WhiteElo "2642"]
>[BlackElo "2516"]
>[Opening "QGD Slav: 4.e3 Bf5"]
>[ECO "D12"]
>[NIC "SL.01"]
>
>1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. e3 Bf5 5. Nc3 e6 6. Nh4 Be4 7. f3 Bg6 8. Qb3
>Qc7 9. Bd2 Nbd7 10. cxd5 exd5 11. O-O-O

[D]r3kb1r/ppqn1ppp/2p2nb1/3p4/3P3N/1QN1PP2/PP1B2PP/2KR1B1R b kq - 0 1

11..b5, this seems like the first mistake according to Shredder, due to e4!
Shredder 7 prefers exchanging queens with 11..Qb6


Analysis by Shredder 7:

11...Qb6 12.Qxb6 Nxb6 13.e4 Bb4 14.Nxg6 fxg6 15.exd5
  ²  (0.39)   Depth: 13/24   00:00:06  1980kN
11...Qb6 12.Qxb6 Nxb6 13.Nxg6 hxg6 14.e4 Bb4 15.e5 Nfd7 16.Bd3 0-0-0 17.a3 Be7
18.Rde1 Kb8 19.Kb1
  ²  (0.30)   Depth: 14/31   00:00:44  14253kN
11...Qb6 12.Qxb6 Nxb6 13.e4 dxe4 14.Nxg6 hxg6 15.Nxe4 0-0-0 16.Ng5 Rd7 17.g3 Kc7
18.Bf4+ Bd6 19.Bxd6+ Kxd6 20.Bh3
  ²  (0.29)   Depth: 15/32   00:01:31  29245kN
11...Qb6 12.Qxb6 axb6 13.Re1 Bb4 14.a3 Bxc3 15.Bxc3 0-0 16.Nxg6 hxg6 17.Bd3 Rfe8
18.e4 Rf8 19.Kd2 g5
  ²  (0.33)   Depth: 16/36   00:03:35  67183kN


12. Nxg6 hxg6 13. e4 Nb6 14. Kb1
>a6 15. g3 Be7 16. Bf4 Qb7 17. Bd3


[d] r3k2r/1q2bpp1/pnp2np1/1p1p4/3PPB2/1QNB1PP1/PP5P/1K1R3R b kq - 0 1


17..O-O-O, castling right into an attack, although according to Shredder 7,
black was probably already losing at this point.  It suggests 17..a5 starting a
queenside attack with its king in the middle, although I doubt this will work.

Analysis by Shredder 7:


17...0-0 18.e5 Nfd7 19.e6 g5 20.Bc1 fxe6 21.Rhe1 e5 22.dxe5 Rxf3
  ±  (1.15)   Depth: 11/23   00:00:05  1611kN
17...Nc4 18.e5 Nh5 19.Bc1 Na5 20.Qc2 b4 21.Ne4 dxe4
  ±  (1.14)   Depth: 11/29   00:00:15  4668kN
17...Nc4 18.Ne2 0-0 19.e5 Nh5 20.Bc1 c5 21.g4 Na5 22.Qc2 c4 23.gxh5
  ±  (0.82)   Depth: 11/36   00:00:22  6727kN
17...Nc4 18.Ne2 a5 19.e5 a4 20.Qc2 Nh5 21.e6 Bd8
  ±  (0.96)   Depth: 12/33   00:00:36  11255kN
17...Nc4 18.e5 Nh5 19.Bc1 Na5 20.Qc2 b4 21.Ne2 b3 22.axb3 Nxb3 23.g4 Nxc1
24.Qxc1 Rb8 25.gxh5 Bd8
  ±  (1.21)   Depth: 13/29   00:01:17  23782kN
17...Nc4 18.e5 Nh5 19.Bc1 Na5 20.Qc2 b4 21.Ne2 b3 22.axb3 Rc8 23.e6 fxe6
24.Bxg6+ Kd7 25.Rd3
  +-  (1.57)   Depth: 13/34   00:01:29  27767kN
17...Nh5 18.Bc1 0-0 19.e5 a5 20.e6 a4 21.exf7+ Rxf7 22.Bxg6 axb3 23.Bh7+
  +-  (1.56)   Depth: 13/34   00:01:38  30409kN
17...Nh5 18.Bc1 Nf6 19.e5 Nfd7 20.e6 0-0 21.exd7
  +-  (1.56)   Depth: 13/34   00:01:53  34661kN
17...a5 18.e5 a4 19.Qc2 Nh5 20.e6 Nxf4 21.gxf4 fxe6 22.Bxg6+ Kd8 23.Rhe1 b4
24.Qf5 exf5
  +-  (1.55)   Depth: 13/34   00:02:03  37602kN
17...a5 18.e5 a4 19.Qc2 Nh5 20.e6 Nxf4 21.gxf4 fxe6 22.Bxg6+ Kd8 23.Rhe1 b4
24.Nxa4 Nxa4
  ±  (1.20)   Depth: 13/34   00:02:18  42182kN
17...a5 18.e5 a4 19.Qc2 Nh5 20.Be3 b4 21.g4 bxc3 22.gxh5 gxh5 23.Qxc3 a3 24.Rhg1
  ±  (1.06)   Depth: 13/34   00:02:34  46855kN
17...a5 18.Qc2 a4 19.Ne2 Nfd7 20.e5 Nf8 21.h4 Nc4 22.Bg5 Bxg5 23.hxg5 Rxh1
24.Rxh1 0-0-0
  ±  (1.04)   Depth: 14/33   00:04:30  81254kN






18. Rc1 Nc4 19. exd5 cxd5 (black had to take with the knight if he wanted to
prolong the game) 20. Nxd5

[d] 2kr3r/1q2bpp1/p4np1/1p1p4/2nP1B2/1QNB1PP1/PP5P/1KR4R w - - 0 1

Analysis by Shredder 7:

20.Ne2 Bd6 21.Bxd6 Rxd6 22.Qb4 Rc6 23.Bxc4 bxc4 24.Qa3 Kb8 25.h4
  ±  (0.82)   Depth: 8/24   00:00:01  434kN
20.Ne2 Bd6 21.h4 Bxf4 22.Nxf4 Rhe8 23.Qb4 Re3 24.Bxc4 dxc4 25.Qc5+ Qc7
  ±  (0.77)   Depth: 9/24   00:00:03  916kN
20.Ne2 Bd6 21.Bxd6 Rxd6 22.Qb4 Rc6 23.Bxc4 bxc4 24.Qa3 Kb8 25.h4 Rb6 26.Rhe1
  ²  (0.65)   Depth: 10/27   00:00:07  2434kN
20.Qc2 Nh5 21.Bd2 Kb8 22.Rhe1 Rc8 23.Bxc4
  ²  (0.66)   Depth: 10/27   00:00:10  3301kN
20.Qc2 Nh5 21.Bd2 Kb8 22.Rhe1 Rc8 23.Bxc4
  ²  (0.69)   Depth: 10/27   00:00:11  3579kN
20.Ka1 Bd6 21.Bxd6 Rxd6 22.Qb4 Re6 23.b3 Ne3 24.Nxb5+ Rc6 25.Rxc6+ Qxc6
  ²  (0.70)   Depth: 10/27   00:00:14  4584kN
20.Ka1 Bd6 21.Bxd6 Rxd6 22.Qb4 Rc6 23.Bxc4 bxc4 24.Nxd5 Nxd5 25.Rxc4 Nxb4
  ²  (0.70)   Depth: 10/27   00:00:15  4794kN
20.Ka1 Bd6 21.Bxd6 Rxd6 22.Qb4 Rc6 23.Rce1 Qb6 24.h4 Qxd4 25.Bxc4 Qxc4 26.Qe7
  ²  (0.68)   Depth: 11/31   00:00:20  6404kN
20.Qc2 Nh5 21.Bd2 Kb8 22.Rhe1 Rc8 23.Bxc4 Rxc4 24.Qd3 Rxc3 25.bxc3
  ²  (0.69)   Depth: 11/31   00:00:22  7028kN
20.Qc2 Nh5 21.Bd2 Kb8 22.Rhe1 Rc8 23.Bxc4 Rxc4 24.Rxe7 Qxe7 25.Nxd5 Rxc2
  ²  (0.69)   Depth: 11/31   00:00:23  7493kN
20.Rc2 Bd6 21.Bxd6 Rxd6 22.Ne4 dxe4 23.Bxc4 bxc4 24.Rxc4+ Rc6 25.Rxc6+ Kd7
26.Qxb7+ Ke8
  ²  (0.70)   Depth: 11/32   00:00:30  9761kN
20.Rc2 Bd6 21.Bxd6 Rxd6 22.Ne4 dxe4 23.Bxc4 Kb8 24.Bxf7 exf3 25.Re1 Rxd4 26.Re8+
  ²  (0.70)   Depth: 11/32   00:00:31  10033kN
20.Nxd5 Qxd5 21.Bxc4 Qxd4
  ±  (0.71)   Depth: 11/32   00:00:36  11724kN
20.Nxd5 Qxd5 21.Bxc4 Qxd4 22.Bxf7+ Kd7 23.Bxg6 Qxb2+ 24.Kxb2 Rxh2+ 25.Rxh2 Bd6
26.Bxd6
  ±  (1.06)   Depth: 11/32   00:00:37  11923kN
20.Nxd5 Rxd5 21.Bxc4 bxc4 22.Rxc4+ Bc5 23.Qc3 Qc6 24.Rxc5 Rxc5 25.dxc5 Rh5
26.Qb3 Qb7 27.Qxb7+ Kd8 28.Qxa6
  +-  (2.93)   Depth: 11/39   00:01:05  21648kN


>Qxd5 21. Rxc4+ bxc4 22. Bxc4 Qb7 23. Be6+ {White wins} 1-0



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