Computer Chess Club Archives

Search

Messages

Subject: Re: Can your program avoid BxN?

Author: Uri Blass

Date: 02:40:09 07/26/01

Go up one level in this thread

On July 25, 2001 at 18:36:08, James T. Walker wrote:

>This position arose today in a game between Hiarcs 7.32 vs Century 3.2.
>Although Hiarcs searched for 6 minutes on an Athlon 900 with 128M hash and it's
>score dropped from the previous 0.87 to -0.56 it still could not resist the BxN
>which I believe loses.  I think almost any move which saves the Bishop keeps
>white alive.  Best is probably Kxb4 or Be3.  Crafty is very fast to avoid BxN.
>Junior7 is slow but finds it in a little over 1 minute.
>
>[D]8/p4k1p/6p1/8/1p2P1P1/1Kn3P1/3B3P/8 w

Here is Hiarcs7.32's analysis on PIII800(64 Mbytes hash tables)

New position
8/p4k1p/6p1/8/1p2P1P1/1Kn3P1/3B3P/8 w - - 0 1

Analysis by Hiarcs 7.32:

1.Bxc3 bxc3 2.Kxc3
  ±  (1.34)   Depth: 1   00:00:00
1.Bxc3 bxc3 2.Kxc3
  ±  (1.34)   Depth: 2/4   00:00:00
1.Bxc3 bxc3 2.Kxc3 Kf8 3.Kd4
  +-  (1.55)   Depth: 3/8   00:00:00
1.Bxc3 bxc3 2.Kxc3 h6 3.e5 Ke7
  +-  (1.41)   Depth: 4/10   00:00:00
1.Bxc3 bxc3 2.Kxc3 h6 3.Kc4 Ke6 4.Kd4
  +-  (1.63)   Depth: 5/10   00:00:00  3kN
1.Bxc3 bxc3 2.Kxc3 h6
  +-  (1.63)   Depth: 6/13   00:00:00  8kN
1.Bxc3 bxc3 2.Kxc3 a5 3.g5 Ke6 4.Kd4 a4 5.Kc4
  +-  (1.50)   Depth: 7/14   00:00:00  24kN
1.Bxc3 bxc3 2.Kxc3 a5 3.g5 Ke6 4.Kd4 a4 5.g4 a3 6.Kc3
  ±  (1.27)   Depth: 8/16   00:00:00  70kN
1.Bxc3 bxc3 2.Kxc3 Ke6 3.Kd4 a5 4.g5 a4
  ±  (1.11)   Depth: 9/22   00:00:01  185kN
1.Bxc3 bxc3 2.Kxc3 Ke6 3.Kd4 a5 4.g5 a4 5.Kc3 Ke5 6.Kb4 a3 7.Kxa3 Kxe4
  ±  (1.05)   Depth: 10/23   00:00:02  450kN
1.Bxc3 bxc3 2.Kxc3 Ke6 3.Kd4 h6 4.h4 a5 5.Kc4 a4 6.Kb4 a3 7.Kxa3
  ±  (0.95)   Depth: 11/24   00:00:07  1115kN
1.Bxc3 bxc3 2.Kxc3 Ke6 3.Kd4 h6 4.h3 a6 5.Ke3 a5 6.Kd4 a4
  ±  (0.80)   Depth: 12/25   00:00:19  2915kN
1.Bxc3 bxc3 2.Kxc3 Ke6 3.Kd4 h6 4.h4 a5 5.h5 gxh5 6.gxh5 a4 7.Kc3 a3 8.Kb3 Ke5
9.Kxa3 Kxe4
  ±  (0.78)   Depth: 13/28   00:00:53  8311kN
1.Bxc3 bxc3
  ²  (0.53)   Depth: 14/30   00:01:56  18160kN, tb=2
1.Bxc3 bxc3 2.Kxc3 Ke6 3.Kd4 a5 4.g5 a4 5.Kd3 Ke5 6.Kc4 Kxe4 7.Kb4 Kf5 8.Kxa4
Kg4 9.Ka5 Kxg5
  ³  (-0.58)   Depth: 14/30   00:02:55  26829kN, tb=13
1.Be3 a5 2.Bb6 Nxe4 3.Bxa5 Nf2 4.g5 Ne4 5.Bd8
  ²  (0.27)   Depth: 14/30   00:09:51  91947kN, tb=39

(Blass, Tel-aviv 26.07.2001)

• Re: Can your program avoid BxN? Bruce Moreland 21:20:17 07/26/01
• Re: Can your program avoid BxN? James T. Walker 08:17:02 07/26/01
  • Re: Can your program avoid BxN? Dann Corbit 10:55:55 07/26/01
    • Re: Can your program avoid BxN? James T. Walker 14:58:59 07/26/01
      • Re: Can your program avoid BxN? Dann Corbit 15:46:35 07/26/01
        • Re: Can your program avoid BxN? James T. Walker 19:35:10 07/26/01

This page took 0 seconds to execute

Last modified: Thu, 15 Apr 21 08:11:13 -0700

Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.