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Subject: interesting endgame position

Author: Jon Dart

Date: 10:09:34 03/30/98

Recently my program "Arasan" played a game on FICS against
"noro", and reached the following position:

8/8/5R2/r5P1/8/p5P1/K5kP/8 b - -

Here the computer played Rxg5 and eventually lost. It appears
that Kxh2 draws (Crafty finds Kxh2 right away. The analysis
goes Kxh2 g6 Rg5 Kxa3 Kxg3 Kb4 Kg4 Kc4 Kh5 Kd4 Rxg6).

This isn't really hard, but it helps if the program knows
the passed pawn is not dangerous even though the king is
behind it. It looks to me like Crafty has special case
code for just this ending (in EvaluatePassedPawns).
Genius 5.0 also likes Kxh2 after a short search. I'm
wondering if any other programs find this difficult.

--Jon

• Re: interesting endgame position Christophe Theron 17:34:13 03/30/98
  • Re: interesting endgame position Christophe Theron 22:10:39 03/30/98
• Re: interesting endgame position Enrique Irazoqui 13:32:15 03/30/98
  • Re: interesting endgame position Will Singleton 15:01:16 03/30/98
    • Re: interesting endgame position Enrique Irazoqui 15:09:20 03/30/98
• Re: interesting endgame position Edward Screven 13:26:42 03/30/98
• Re: interesting endgame position Dan Homan 11:57:17 03/30/98

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