Author: Lex Loep
Date: 02:01:42 05/02/01
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On May 01, 2001 at 05:47:12, Ferdinand S. Mosca wrote: > >Hello!! > >ERT (Engine Research Tool) has a feature called threshold which is applicable in >running engine/engine match. This threshold which is settable prior to the match >will determine which engine will win for a game. Under the ERT if white is >better the score is positive if black is better the score is negative. Using >Crafty as white has no problem, but if Crafty is black and white is better, >Crafty will display a negative score, it should have been a positive score. So >what happened is the threshold becomes useless and Crafty is mated maintaining a >negative score. >This threshold will function only if both engines agreed in the score. If white >evaluates the position as better for him say (+3) and if black agrees (+3) then >the game will be stopped and 1 point will be awarded to white. Same for Black >but with a negative score. > >Is this due to Crafty's scoring mode, always (+) if white is better >otherwise (-) regardless of the color it takes? Or maybe some problem with the >ERT. I have tested Yace, it works fine whether handling black or white. > >Regards, >Dinan This is due crafty's scoring mode. The winboard adapter assumes the score given is always from the computers view. I think most winboard engines return there score this way, also crafty used to do this. I vagely remember some messages saying this has changed in crafty. I may add an option in a future update of the winboard adapter. Lex
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