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Subject: Re: Repetition/draw test

Author: Paulo Soares

Date: 04:21:47 03/08/00

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On March 08, 2000 at 05:11:11, Howard Exner wrote:

>Test your chess engine if it handles this repition theme correctly. To do this
>set up the position below and play the white side yourself. Do not enter the
>winning move Kh5 but instead play the blunder Kg5. Now let your program play the
>black side at say game/15. It will of course play Kd5+ which forces perpetual
>check. After it does that try to trick the program and reply Kg4.
>Now the test - does your program play the correct Qd1+ or does it blunder and
>mistakenly repeat the position with Qe4+, assuming that the opponent will
>blunder again with Kg5? Rebel Century failed this test and assumed white would
>play again the poor move Kg5.
>Why would a program do this? Do other programs fall into this trap of assuming
>a repetition of moves even when not forced?
>
>[D]8/4k3/7Q/8/4q1KP/6P1/8/8 w - -

Hiarcs7.32 it's ok with this test. After 1.kg5 Qd5+, the time
for to play 2. Kg4 was 40sec, and the reply is Qd1+.

Paulo Soares, from Brazil



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