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Subject: Re: Why this move is so difficult for engines ?

Author: Ernst Walet

Date: 11:57:30 10/17/02

Go up one level in this thread

On October 17, 2002 at 04:51:28, Christophe Drieu wrote:

>[D] 8/4k3/4p3/pp5p/6p1/2P2rP1/PPK2R1P/8 w - - 0 1
>
>Rxf3 !


Hiarcs8 finds it fast and gets a good score as well.

New game
8/4k3/4p3/pp5p/6p1/2P2rP1/PPK2R1P/8 w - - 0 1

Analysis by Hiarcs 8:

1.Rxf3 gxf3
  =  (-0.12)   Depth: 4/15   00:00:00
1.Rxf3 gxf3
  =  (-0.12)   Depth: 4/15   00:00:00
1.Rxf3 gxf3
  =  (-0.12)   Depth: 4/15   00:00:00
1.Rxf3 gxf3
  =  (-0.12)   Depth: 4/15   00:00:00
1.Rxf3 gxf3
  =  (-0.12)   Depth: 4/15   00:00:00
1.Rxf3 gxf3
  =  (-0.12)   Depth: 4/15   00:00:00
1.Rxf3 gxf3
  =  (-0.12)   Depth: 4/15   00:00:00
1.Rxf3 gxf3 2.Kd3 h4 3.Ke3 hxg3 4.hxg3
  ±  (0.95)   Depth: 4/15   00:00:00
1.Rxf3 gxf3
  ²  (0.65)   Depth: 5/15   00:00:00  4kN
1.Rxf3 gxf3 2.Kd3 e5 3.h3 e4+ 4.Ke3 a4
  µ  (-0.77)   Depth: 5/16   00:00:00  7kN
1.Rd2 Kf6 2.b3 Ke5 3.c4
  ³  (-0.34)   Depth: 5/16   00:00:00  8kN
1.Rd2 Kf6 2.b3 Ke5 3.c4 bxc4 4.bxc4
  ³  (-0.31)   Depth: 6/16   00:00:00  13kN
1.Rxf3 a4
  =  (-0.07)   Depth: 6/16   00:00:00  17kN
1.Rxf3 gxf3 2.Kd2 e5 3.a4 e4 4.axb5
  ±  (1.05)   Depth: 6/16   00:00:00  21kN
1.Rxf3 gxf3
  ±  (0.76)   Depth: 7/16   00:00:00  31kN
1.Rxf3 gxf3 2.Kd3 e5 3.b3 e4+ 4.Ke3 b4 5.c4 Kd6
  ³  (-0.63)   Depth: 7/18   00:00:00  53kN
1.Rd2 Kf6 2.b3 Ke5 3.c4 bxc4 4.bxc4
  ³  (-0.31)   Depth: 7/19   00:00:00  59kN
1.Rd2 Kf6 2.b3 b4 3.c4 Rc3+ 4.Kb2 Kf5 5.a3
  =  (-0.23)   Depth: 8/22   00:00:00  97kN
1.Rd2 Kf6 2.b3 b4 3.c4 Rc3+ 4.Kb2 Ke5 5.Re2+ Kd6 6.a3
  =  (-0.24)   Depth: 9/22   00:00:01  188kN
1.Rd2 a4 2.b3 e5 3.Rd5 Ke6 4.Rxb5 Rf2+ 5.Kd3 Rxa2
  =  (-0.23)   Depth: 10/23   00:00:02  461kN
1.Rxf3 gxf3
  =  (0.02)   Depth: 10/23   00:00:03  571kN
1.Rxf3 gxf3 2.Kd2 e5 3.a4 bxa4 4.h3 Kf6 5.Ke3 e4 6.g4
  ±  (1.07)   Depth: 10/23   00:00:03  632kN
1.Rxf3 gxf3 2.Kd2 e5 3.a4 bxa4 4.h4 Kf6 5.g4 hxg4 6.Ke3 Kf5
  ±  (0.97)   Depth: 11/23   00:00:05  989kN
1.Rxf3 gxf3 2.Kd2 e5 3.a4 bxa4 4.h3 Kf6 5.c4 f2 6.Ke2 Kg5 7.Kxf2 Kf6
  ±  (1.19)   Depth: 12/26   00:00:08  1758kN
1.Rxf3 gxf3 2.Kd3 e5 3.b3 e4+ 4.Ke3 Kd6 5.h3 Kc5 6.a4 bxa4 7.bxa4 f2 8.Kxf2
  ±  (1.32)   Depth: 13/28   00:00:17  3734kN
1.Rxf3 gxf3
  +-  (1.57)   Depth: 14/28   00:00:20  4386kN
1.Rxf3 gxf3 2.Kd3 e5 3.Ke3 e4 4.a4 bxa4 5.h3 a3 6.bxa3 Kf6 7.c4 f2
  +-  (1.92)   Depth: 14/35   00:00:32  6829kN, tb=1
1.Rxf3 gxf3
  +-  (2.17)   Depth: 15/35   00:00:43  9404kN, tb=2
1.Rxf3 gxf3 2.Kd2 e5 3.a4 bxa4 4.h3 Kf6 5.c4 a3 6.bxa3 Kg5 7.Ke3 f2 8.Kxf2 a4
  +-  (2.50)   Depth: 15/37   00:01:13  15956kN, tb=2
1.Rxf3 gxf3
  +-  (2.75)   Depth: 16/37   00:01:33  20012kN, tb=4
1.Rxf3 gxf3 2.Kd2 Kd6 3.Ke3 f2 4.Kxf2 a4 5.Kf3 e5 6.h3 Ke6 7.g4 h4 8.Ke4 a3
  +-  (2.88)   Depth: 16/37   00:02:41  34006kN, tb=4

(Athlon 4 XP1500+, 64MB hash 17.10.2002)



Ernst.

• Re: Why this move is so difficult for engines ? Joachim Rang 12:56:41 10/17/02
• Re: Why this move is so difficult for engines ? Gian-Carlo Pascutto 12:44:24 10/17/02
  • Re: Why this move is so difficult for engines ? Ernst Walet 21:50:20 10/17/02
    • Re: Why this move is so difficult for engines ? Gian-Carlo Pascutto 23:10:03 10/17/02

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