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

Author: Jaime Benito de Valle Ruiz

Date: 07:57:21 06/21/04


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

After the queen exchange this is the position:

[d]7k/6p1/1p6/p2P4/5PKP/8/8/8 b - - 0 51

White cannot stop the passed pawn on a, but the black king can stop the d-one.
Why some evals work better than others here?

Jaime



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