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Subject: Re: Endgame Testposition (easy for some, hard for others)

Author: Thomas McBurney

Date: 09:14:51 06/21/04

Go up one level in this thread


On June 21, 2004 at 10:57:21, Jaime Benito de Valle Ruiz wrote:

>In this position, engines such as Crafty or Fruit need to reach depths of about
>13 (15-30 secs on an Athlon 1800+) before they find the winning, while many
>other (even amateur) engines show very high scores from depth 1:
>
>[d]7k/6p1/1p6/p2Q4/2P1qPKP/8/8/8 b - - 0 50


Thanks for this test position.  I just happen to have been programming simple
pawn end game knowledge into my chess engine in the past two weeks and as you
can see it gives a high score for black immediately.  I used the pawn square
rule to acheive this and I have found that it has improved the end game
performace of my engine.

Kanguruh v1.87

   2    783      12         109  e4d5 c4d5 h8g8
   3    762      12         277  e4d5 c4d5 h8g8 g4f5
   4    778      12        1064  e4d5 c4d5 h8g8 g4f5 a5a4
   5    758      11        4265  e4d5 c4d5 h8g8 g4f5 a5a4 f5e6
   6    774       8       19703  e4d5 c4d5 h8g8 g4f5 a5a4 f5e6 a4a3
   7    759       6       86397  e4d5 c4d5 h8g8 g4f5 a5a4 f5e6 a4a3 e6d6
   8    777      67      387899  e4d5 c4d5 h8g8 g4f5 a5a4 f5e5 a4a3 e5d6 g8f7
   9    747     327     1749309  e4d5 c4d5
  10    777    1543     8350876  e4d5! c4d5
  10    777    1560     8402972  e4d5 c4d5
  11    747    7299    39955382  e4d5 c4d5

Cheers,
Tom.



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