Author: Volker Böhm
Date: 01:53:22 09/04/04
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Hi, sorry that I disagree. This is not the horizont effect. The horizont effect amkes a chess engine do moves that don´t solve a problem just to push the loosing move out of sight. Sometimes this "out of sight pushing move" is a bad move, that seems good for the engine. Whis checkmate it is another thing. A typically chess program gives mates different values according the amount of moves needed to reach the mate. Thus a mate in 3 is less valuable than a mate in 2 (for the mating engine). This makes the mated engine trying to prevent the mate as long as it can. Both is not the problem described in the post. The problem is that a typically engine cannot "swindel". Thus if it sees a mate it is not able to play as if it hasen´t seen it. You can add extra code to swindel. I think crafty has swindel code when using egtb. Whis egtb the problem is even larger as with seen mates. Greetings Volker
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