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Subject: Re: pawn sac

Author: Yar

Date: 12:24:02 01/12/05

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On January 12, 2005 at 13:51:34, Vaidotas wrote:

>Hallo all!
>
>While playing on playchess my program CM_9000(TO5) found a nice win in the game
>vs Fruit. Here is a diagram:
>
>[D]r1r3k1/1q4p1/1pN1pp1p/1P1n4/P1R5/6P1/2Q2PP1/3R2K1 w - - 0 47
>
>a5!

Analysis by Shredder 8:

1.Rxd5 exd5
  -+  (-1.97)   Depth: 1/2   00:00:00
1.Qe4 Qd7 2.Rcc1 Qd6
  ±  (1.00)   Depth: 4/10   00:00:00
1.Qe4 Qd7 2.Rcc1 Qd6
  ±  (1.00)   Depth: 4/10   00:00:00
1.Qe4 Qd7 2.Rcc1 Qd6
  ±  (1.00)   Depth: 4/10   00:00:00
1.Qe4 Qd7 2.Rcc1 Qd6
  ±  (1.00)   Depth: 4/10   00:00:00
1.Qe4 Qd7 2.Rcc1 Qd6
  ±  (1.00)   Depth: 4/10   00:00:00
1.Qe4 Qd7 2.Rcc1 Qd6
  ±  (1.00)   Depth: 4/10   00:00:00
1.Qe4 Qd7 2.Rcc1 Qd6
  ±  (1.00)   Depth: 4/10   00:00:00
1.Qe4 Qd7 2.Rcc1 Qd6
  ±  (1.00)   Depth: 4/10   00:00:00
1.Qe4 Qd7 2.Rcc1 Qd6
  ±  (1.00)   Depth: 4/10   00:00:00
1.Qe4 Qd7 2.Rcc1 Qd6
  ±  (1.00)   Depth: 4/10   00:00:00
1.Qe4 Qf7 2.Rcc1 Qd7 3.Re1
  ±  (0.92)   Depth: 5/14   00:00:00
1.Qe4 Qd7 2.Rdc1 Qd6 3.Qg6 e5
  ±  (1.04)   Depth: 6/18   00:00:00
1.Rc1 Rxc6 2.bxc6 Re8
  ±  (1.05)   Depth: 6/18   00:00:00
1.Rc1 Qf7 2.Qe4 e5 3.Rd1 Ne7
  ±  (1.22)   Depth: 6/18   00:00:00
1.Rc1 Qf7 2.Qe4 f5 3.Re1 fxe4 4.Ne7+ Nxe7
  ±  (0.97)   Depth: 7/17   00:00:00  32kN
1.Rc1 Qf7 2.a5 bxa5 3.Nxa5 Rd8
  ±  (0.94)   Depth: 7/17   00:00:00  35kN
1.Qe4 Qd7
  ±  (0.95)   Depth: 7/17   00:00:00  36kN
1.Qe4 Qd7 2.Re1 Re8 3.Rec1 Qf7 4.R1c2
  ±  (1.04)   Depth: 7/17   00:00:00  41kN
1.Qe4 Qf7 2.Rdc1 Re8 3.Nd4 e5 4.Nf5 Red8
  ±  (0.82)   Depth: 8/22   00:00:00  90kN
1.Qg6 Qf7 2.Qg4 Rxc6 3.bxc6 Rxa4
  ±  (0.83)   Depth: 8/22   00:00:00  119kN
1.Qg6 Qf7 2.Qg4 Re8 3.Rxd5 exd5 4.Qxg7+ Kxg7
  ±  (0.83)   Depth: 8/22   00:00:00  123kN
1.Qg6 Qf7 2.Qg4 Re8 3.Rdc1 Rec8 4.Re1 Re8 5.Rec1 Rec8 6.Re1 Re8 7.Rec1 Rec8
  ±  (0.89)   Depth: 9/20   00:00:01  201kN
1.Qg6 Qf7 2.Qg4 Re8 3.Rdc1 Rec8 4.Re1 Re8 5.Rec1 Rec8 6.Re1 Re8 7.Rec1 Rec8
  ±  (0.87)   Depth: 10/17   00:00:01  365kN
1.Qg6 Qf7 2.Qg4 Re8 3.Rdc1 e5 4.Qf5 Qe6 5.Qg6 f5 6.Qxe6+ Rxe6
  ±  (0.79)   Depth: 11/19   00:00:02  659kN
1.Qe4 Qd7 2.Re1 Re8 3.Rec1 Qf7 4.Nd4 Rec8 5.Nxe6 Re8 6.Qxd5 Qxe6
  ±  (0.80)   Depth: 11/19   00:00:02  708kN
1.Qe4 Qd7 2.Rdc1 Re8 3.Nd4 Qf7 4.Nxe6 Qxe6 5.Qh7+ Kxh7
  ±  (0.86)   Depth: 11/30   00:00:03  882kN
1.Qe4 Qd7 2.Re1 Re8 3.Qxe6+ Rxe6 4.Ne7+ Qxe7 5.Rc8+ Rxc8
  ±  (0.83)   Depth: 12/33   00:00:04  1396kN
1.Re1 Qf7 2.Qd3 Re8 3.Nd4 e5 4.Nc6 f5 5.Nxe5 Rxa4
  ±  (0.84)   Depth: 12/33   00:00:05  1611kN
1.Re1 Re8 2.Qd3 Qd7 3.Nd4 Rad8 4.Qg6 Ne7 5.Kh2 Nxg6
  ±  (0.85)   Depth: 12/33   00:00:07  2157kN
1.Qe2 Re8 2.Qe4 Qf7 3.Nd4 Qh5 4.Re1 Kf7
  ±  (0.86)   Depth: 12/33   00:00:07  2234kN
1.Qe2 Re8 2.Qe4 Qc7 3.Rxd5 exd5 4.Qe5 fxe5 5.Ne7+ Rxe7
  ±  (0.86)   Depth: 12/33   00:00:07  2307kN
1.Qe2 Re8 2.Qg4 Qf7 3.Re1 e5 4.Qe2 Re6 5.Qe4 Rd6 6.Rec1 Qe8 7.Qf5
  ±  (0.86)   Depth: 13/28   00:00:11  3516kN
1.Re1 Re8 2.Qe4 Qd7 3.Qg4 f5 4.Qh5 Qf7 5.Qh4 Qf6 6.Qg5
  ±  (0.87)   Depth: 13/28   00:00:11  3633kN
1.Re1 Re8 2.Nd4 Qd7 3.Qe4 e5 4.Nf5 Ne7 5.Nxe7+ Qxe7 6.Rc6 Qa7 7.Qg6 Qf7 8.Qe4 f5
9.Qb4 Rad8
  ±  (1.02)   Depth: 13/29   00:00:13  4119kN
1.Re1 Re8 2.Nd4 Qd7 3.Qe4 e5 4.Nf5 Ne7 5.Nxe7+ Qxe7 6.Rec1 Rad8 7.Rc6 Qa7 8.Qg6
Qxa4 9.Rxb6
  ±  (0.96)   Depth: 14/29   00:00:15  5057kN
1.Re1 Re8 2.Nd4 Qd7 3.Qe4 e5 4.Nf5 Ne7 5.Nxe7+ Qxe7 6.Rc6 Qd8 7.Kh2 Qd4 8.Qd5+
Qxd5
  ±  (1.00)   Depth: 15/34   00:00:21  7362kN
1.Re1 Re8 2.Nd4 Qd7 3.Qe4 e5 4.Nf5 Ne7 5.Nxe7+ Qxe7 6.Rec1 Rad8 7.Rc6 Qa7 8.Qg6
Qxa4 9.Rxf6 Rd1+ 10.Kh2
  ±  (0.91)   Depth: 16/36   00:00:32  10917kN
1.Re1 Qf7 2.Qe4 Re8 3.Nd4 e5 4.Nf5 Rad8 5.Rc6 Qg6 6.Rxb6 Kf7 7.Nd6+ Kg8 8.Qxg6
Nxb6
  ±  (1.03)   Depth: 17/36   00:01:05  21664kN
1.Qe4 Qd7 2.Re1 Re8 3.Nd4 e5 4.Nf5 Ne7 5.Nxe7+ Qxe7 6.Rec1 Rad8 7.Rc6 Rd6 8.Qe3
Qd8 9.Qb3+ Kh8 10.a5 Rxc6 11.bxc6
  ±  (1.04)   Depth: 17/36   00:01:10  23004kN
1.Qe4 Qd7 2.Re1 Re8 3.Nd4 e5 4.Nf5 Ne7 5.Nxe7+ Qxe7 6.Rec1 Rad8 7.Rc6 Rd6 8.Qe3
Qd8 9.Qb3+ Kh8 10.a5 Rxc6 11.bxc6
  ±  (1.04)   Depth: 17/41   00:01:14  24497kN
1.a5 bxa5 2.Rxd5 exd5 3.Ne7+ Kf8 4.Rxc8+ Qxc8 5.Nxc8 Rxc8 6.Qxc8+ Kf7
  ±  (1.05)   Depth: 17/43   00:01:35  31261kN
1.a5 bxa5 2.Rxd5 exd5 3.Ne7+ Kf8 4.Rxc8+ Qxc8 5.Nxc8 f5
  ±  (1.40)   Depth: 17/44   00:01:42  33560kN
1.a5 Re8 2.a6 Qf7 3.Qd3 Qh5 4.Rdc1 Rac8 5.Qe4 Kf7 6.Ne5+ Qxe5 7.Qxe5 f5 8.Rxc8
Kg8
  +-  (2.12)   Depth: 17/48   00:07:15  155333kN
1.a5 Re8 2.a6 Qd7 3.Qg6 Qf7 4.Qd3 Qh5 5.Rdc1 Rac8 6.Qe4 Qf7 7.Qf3 Ra8 8.Re1 Rac8
9.Ra4 e5 10.Nd4 exd4
  +-  (2.14)   Depth: 18/42   00:09:03  192815kN
1.a5 Re8 2.a6 Qd7 3.Qe4 Rac8 4.Qb1 Qf7 5.Rxd5 exd5 6.Kh2 dxc4 7.Ne7+ Rxe7 8.Qh7+
Kxh7 9.Kg1 f5
  +-  (2.15)   Depth: 19/46   00:10:24  221589kN
1.a5 Re8 2.a6 Qd7 3.Qg6 Qf7 4.Qxf7+ Kxf7 5.Nb4 Nxb4 6.Rxb4 Ke7 7.Rbd4 Ra7 8.Rd6
Rb8 9.Kf1 e5 10.Ke2 Rc7 11.Rxb6 Rxb6 12.Rd7+ Kxd7
  +-  (2.15)   Depth: 20/53   00:13:11  275765kN
1.a5 Re8 2.a6 Qd7 3.Qg6 Rf8 4.Qg4 Rfe8 5.Qh5 Rf8 6.Rg4 Kh8 7.Re4 Qe8 8.Qf3 Qf7
9.Ree1 Rfe8 10.Qe2 Kg8 11.Qh5
  +-  (2.25)   Depth: 21/55   00:25:36  514887kN
1.a5 Re8 2.a6 Qd7 3.Qg6 Rf8 4.Qg4 Rfe8 5.Qh5 Rf8 6.Rg4 f5 7.Rc4 Qd6 8.Qe2 Rac8
9.Ne5 Rfd8 10.Rxc8 Rxc8 11.Nc4 Nc3 12.Rxd6 Kh7 13.Rxb6
  +-  (2.32)   Depth: 22/62   00:39:35  784036kN

(, Rosco 12.01.2005)



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