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Subject: Repetition/draw test

Author: Howard Exner

Date: 02:11:11 03/08/00


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 - -



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