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Subject: Re: test position

Author: James T. Walker

Date: 17:24:30 10/04/04

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On October 03, 2004 at 14:22:11, Bas Hamstra wrote:

>On October 03, 2004 at 03:29:53, Daniel Shawul wrote:
>
>>In a blitz game of two versions of my engine,the new version
>>surprized me by making Bxf7+ move at this position? Is this a resonable
>>move?
>>[D]1r2r1k1/q1p2pp1/p6p/P2BP3/1p3P2/4b2P/1P2Q1P1/R2R3K w
>
>Tao 5.7:
>
>  8.03	 0:02 	+0.44++
>  8.04	 0:02 	+0.54 	1.Qg4 Rf8 2.f5 Bg5 3.f6 gxf6 4.exf6 Qf2
>  9.01	 0:03 	+0.67 	1.Qg4 Rf8 2.f5 Bg5 3.e6 fxe6 4.fxe6 Kh8 5.Re1
> 10.01	 0:08 	+0.68 	1.Qg4 Re7 2.e6 f5 3.Qxf5 Rf8 4.Qg6 Rf6 5.Qe4 Rxf4
> 10.02	 0:12 	+0.68++
> 10.02	 0:14 	+0.73 	1.Bxf7+ Kxf7 2.Rd7+ Re7 3.Qh5+ g6 4.Rxe7+ Kxe7 5.Qxg6
> 11.01	 0:48 	+2.02 	1.Bxf7+ Kxf7 2.Rd7+ Re7 3.Rad1 Qc5 4.R7d5 Qc6 5.Qxe3
> 12.01	 1:15 	+2.01 	1.Bxf7+ Kxf7 2.Rd7+ Re7 3.Rad1 Qc5 4.R7d5 Qc6 5.Qxe3
> 13.01	 3:13 	+1.95 	1.Bxf7+ Kxf7 2.Rd7+ Re7 3.Rad1 Qc5 4.R7d5 Qc6 5.Qxe3
>
>Bas.

Shredder 8 thinks it's ok.  Here is the analysis.

New game,
1r2r1k1/q1p2pp1/p6p/P2BP3/1p3P2/4b2P/1P2Q1P1/R2R3K w - - 0 1

Analysis by Shredder 8:

1.Qh5 Bxf4 2.Bxf7+ Kh8
  ²  (0.59)   Depth: 1/4   00:00:01
1.Qh5 Bxf4 2.Bxf7+ Kh7
  ²  (0.63)   Depth: 1/5   00:00:02
1.Qh5 c5
  ²  (0.29)   Depth: 2/6   00:00:02
1.Qh5 c5
  ²  (0.29)   Depth: 2/6   00:00:02
1.Qc4 c5
  ²  (0.35)   Depth: 2/6   00:00:02
1.Qc4 c5
  ²  (0.35)   Depth: 2/6   00:00:02
1.Qc4 c5 2.Qe4
  ²  (0.36)   Depth: 3/8   00:00:03
1.Qh5 c5 2.Qf5
  ²  (0.42)   Depth: 3/8   00:00:03
1.Qh5 c5 2.Qf5
  ²  (0.42)   Depth: 3/8   00:00:03
1.Qh5 c5 2.Qf5 Rbd8
  ²  (0.32)   Depth: 4/10   00:00:03
1.Qc4 Bxf4 2.Qxf4 Qg1+ 3.Rxg1
  ²  (0.33)   Depth: 4/16   00:00:03
1.Qc4 c5 2.e6 fxe6 3.Bxe6+ Kh8
  ²  (0.37)   Depth: 4/16   00:00:04
1.Qc4 c5 2.e6 fxe6 3.Bxe6+ Kh8
  ²  (0.37)   Depth: 5/10   00:00:04
1.Rab1 Bxf4 2.Bxf7+ Kf8 3.Bxe8 Qg1+ 4.Rxg1
  ²  (0.38)   Depth: 5/18   00:00:04
1.Rab1 Rbd8 2.Bxf7+ Kxf7 3.Qc4+ Kf8 4.Qf7+ Kxf7
  ²  (0.38)   Depth: 5/18   00:00:04
1.Rab1 Rbd8 2.Qc4 c5 3.Qe4 Bd4
  =  (0.14)   Depth: 6/22   00:00:04
1.Qd3 Rbd8 2.Qf5 Bxf4 3.Qxf4 Qg1+ 4.Kxg1
  =  (0.15)   Depth: 6/22   00:00:05
1.Qd3 Rbd8 2.Qb3 Rxd5 3.Qxd5 Bxf4
  ²  (0.49)   Depth: 6/22   00:00:05
1.Qc4 c5 2.e6 Bd4 3.exf7+ Qxf7 4.Bxf7+ Kf8 5.Bxe8
  ²  (0.50)   Depth: 6/22   00:00:05
1.Qc4 c5 2.e6 fxe6 3.Bxe6+ Kh8 4.Rd7
  ²  (0.51)   Depth: 6/22   00:00:05
1.Qc4 c5 2.e6 fxe6 3.Bxe6+ Kh8 4.Rd6 Rbd8 5.Rxa6
  ²  (0.33)   Depth: 7/12   00:00:05  56kN
1.Qd3 Rbd8 2.Qb3 Rxd5 3.Qxd5 Bxf4
  ²  (0.34)   Depth: 7/26   00:00:06  75kN
1.Qd3 Rbd8 2.Qb3 Rxd5 3.Rxd5 Qc5 4.Rxc5
  ²  (0.69)   Depth: 7/26   00:00:06  82kN
1.Qd3 Qc5 2.Qxa6 Bxf4 3.Qc6 Qxc6 4.Bxf7+ Kxf7
  ²  (0.69)   Depth: 7/26   00:00:06  97kN
1.Qd3 Re7 2.g3 Bd4 3.Qxd4 Rxe5
  ±  (0.82)   Depth: 8/26   00:00:07  171kN
1.Qd3 Qc5 2.Qxa6 Bxf4 3.Qf1 Qe3 4.Qc4 Re7 5.a6 Bxe5
  ²  (0.63)   Depth: 9/30   00:00:13  353kN
1.Qc4 c5 2.e6 fxe6 3.Bxe6+ Kh8 4.Rd7 Rbd8 5.Rxa7 Rd1+ 6.Rxd1
  ²  (0.64)   Depth: 9/30   00:00:14  434kN
1.Qc4 c5 2.e6 fxe6 3.Bxe6+ Kh8 4.Rd7 Rb7 5.Re7
  ²  (0.64)   Depth: 9/30   00:00:15  444kN
1.Qc4 c5 2.e6 fxe6 3.Bxe6+ Kh8 4.Rd7 Rb7 5.Qe4 Rxd7 6.Qh7+ Kxh7
  ²  (0.39)   Depth: 10/18   00:00:19  546kN
1.Qc4 c5 2.e6 fxe6 3.Bxe6+ Kh8 4.Rd7 Rxe6 5.Rxa7 Rd8
  ²  (0.39)   Depth: 10/20   00:00:20  577kN
1.Qd3 Qc5 2.Qxa6 Bxf4 3.Qf1 Qe3 4.Qc4 Rbd8
  ²  (0.40)   Depth: 10/23   00:00:21  621kN
1.Qd3 Qc5 2.Qxa6 Bxf4 3.Qf1 Qe3 4.Qc4 Qg1+ 5.Kxg1 Bh2+ 6.Kxh2
  ±  (0.75)   Depth: 10/24   00:00:22  693kN
1.Qd3 Qc5 2.Qxa6 Red8 3.Qd3 c6 4.Bxf7+ Kxf7 5.Qg6+ Kxg6 6.Rxd8 Rxd8 7.f5+ Kxf5
  ±  (0.75)   Depth: 10/26   00:00:24  878kN
1.Qd3 Qc5 2.Qxa6 Red8 3.Qc6 Qxc6 4.Bxc6 Bxf4 5.Re1 Rd2 6.Re4 Bg3
  ±  (0.75)   Depth: 11/24   00:00:32  1485kN
1.Qd3 Re7 2.g3 h5 3.Be4 Bf2 4.Rac1 h4 5.Qd8+ Re8
  ±  (0.98)   Depth: 12/33   00:00:46  2807kN
1.Rd3 Bf2 2.Rad1 Rbc8
  ±  (0.99)   Depth: 12/39   00:00:56  4226kN
1.Rd3 Bf2 2.Rad1 Re7 3.Bc4 Rf8 4.Qe4 Qc5 5.Bxa6 Qxa5 6.Bc4 c5
  ±  (1.23)   Depth: 12/39   00:00:59  4643kN
1.Rd3 Bd4 2.Qg4 c6 3.Rg3 g5 4.fxg5 h5 5.Qxh5 cxd5 6.Qxf7+ Kxf7 7.g6+ Kf8 8.g7+
Qxg7
  ±  (0.98)   Depth: 13/36   00:01:18  6888kN
1.Rd3 Bd4 2.Bc4 c5 3.Rg3 Kh8 4.Rc1 Qc7 5.Bxa6 Qxa5 6.Bc4 Qc7 7.Qc2
  ²  (0.69)   Depth: 13/36   00:01:30  8500kN
1.Qd3 Re7 2.g3 h5 3.Be4 Bf2 4.Rac1 h4 5.Qd8+ Re8
  ²  (0.70)   Depth: 13/36   00:01:32  8707kN
1.Qd3 Red8 2.Qf5 c6 3.Be4 g6 4.Qf6 Rd4 5.Bxg6 fxg6 6.Qf7+ Kxf7 7.e6+ Kxe6
  ²  (0.70)   Depth: 13/36   00:01:39  9753kN
1.Qd3 Red8 2.Qf5 c6 3.Be4 g6 4.Qf6 Rd4 5.Qxc6 Bxf4 6.e6 Rxd1+ 7.Rxd1 Bd6 8.Rxd6
Qg1+ 9.Kxg1
  ±  (0.95)   Depth: 14/34   00:02:21  15051kN
1.Qd3 Rf8 2.Qe4 c6 3.Bxc6 Qc5 4.Bd7 b3 5.Rd3 Bf2 6.Rad1 Qxa5 7.Rd6 Rbd8
  ±  (1.13)   Depth: 14/38   00:02:45  18206kN
1.Bxf7+ Kxf7 2.Rd7+ Re7 3.Rad1 Qc5 4.R7d5 g6 5.Rxc5 Rxe5
  ±  (1.14)   Depth: 14/42   00:03:12  22117kN
1.Bxf7+ Kxf7 2.Rd7+ Re7 3.Rad1 Qc5 4.R7d5 g6 5.Rxc5 Rxe5 6.fxe5 Rd8 7.Rxd8 Bd4
8.Rxd4
  +-  (1.49)   Depth: 14/42   00:03:21  23361kN
1.Bxf7+ Kxf7 2.Rd7+ Re7 3.Rad1 Qc5 4.R7d5 Qc6 5.Qxe3 Kg8 6.Qb3 Kh7 7.Qd3+ Kg8
8.f5 Rf8 9.e6 Qa4 10.Qd4 Kh8
  +-  (2.89)   Depth: 14/43   00:05:00  36746kN
1.Bxf7+ Kxf7 2.Rd7+ Re7 3.Rad1 Qc5 4.R7d5 Qc6 5.Qxe3 Kg8 6.Qb3 Kh7 7.R5d4 g6
8.Rxb4 Rxb4 9.Qxb4 Rf7 10.Rd8 Qc1+ 11.Kh2 c5 12.Qe4
  +-  (2.78)   Depth: 15/44   00:07:08  54163kN

(,  04.10.2004)




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