Author: Roger Brown
Date: 15:53:20 12/03/05
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>>Mate in 11? Not my Shredder 8! >It found a Mate. Does this mean it was the best line? No, of course not. >As you can see with deeper search it reverted to Mate in 14. >How often do you see a PV Change with time? >This is no different. Hello Chandler, Your statement is difficult for me to understand. When I use Franz Huber's wonderful Chest UCI and it tells me mate in 5 it means that whatever the opponent replies with, mate is going to come in that number of moves. Let me use a simple example. Mate in one means that after the mating party moves, there is no possible escape for the enemy king. For an engine to say that there exists a mate in 11 then say a mate in 14 for the same position means that there is a problem. A mate in one is a mate in one. An engine that subsequently evaluated it as a mate in ten has a problem with mate calculations. The other way round, finding a mate in ten which, when tested with a matesolver such as Chest, really is a mate in eight, just means that the engine has found a less efficient solution that still leads to a mate. Do you understand now why there is something wrong with your statements about depth and time? Later.
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