Author: Ferdinand S. Mosca
Date: 02:47:12 05/01/01
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
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