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Subject: a difficult test for computer programs(perpetual check)

Author: blass uri

Date: 02:57:48 06/03/98


1Q6/P7/6pk/6q1/2P3p1/6K1/8/8

black to move

position from the nunn match between fritz5 and junior4.6
(1000 seconds per move)
Junior forced a draw by 125...Qe3+ 126.Kxg4 Qe2+ 127.Kf4 Qxc4+
128.Ke5 Qc5+ 129.Ke6 Qc6+ 130.Ke7 Qc5+
...
can some program see the draw in a reasonable time(maybe Rebel).

fritz5 saw the draw only after 125...Qe3+ when Junior saw the draw
only at move 130

the last move of fritz5 was 125.Kf4 to g3.
what is the result after Kf4 to e4?

Uri



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