Author: Robert Allgeuer
Date: 13:37:19 10/18/03
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On October 18, 2003 at 13:20:16, Russell Reagan wrote: >On October 18, 2003 at 12:00:09, Robert Allgeuer wrote: > >>Conclusion: >>=========== >> >>My tests indicate that the overall playing strength of Crafty 18.15 remains >>more or less unchanged by the addition of Multi-ProbCut. However, the >>characteristic of the engine changes significantly due to ProbCut: Even though >>nominal search depth is increased by one to two plies, tactical strength is >>severely reduced. >>Furthermore with ProbCut match results become more unpredictable and >>inconsistent: Apparently there are types of opponents against which ProbCut >>works very well and results in significantly improved results, but there are >>also other opponents (the tactically stronger ones?) where ProbCut has exactly >>the opposite effect. > >Hi Robert, > >I did some testing also, and I experienced basically the same thing. MPC Crafty >seemed to perform a bit weaker all around for me, but when it came to blitz time >controls it stood no chance. For instance, I have tested Crafty 19.03 against >Ruffian at 1/0 and 2/0, and while Ruffian wins the matches, it is somewhat >close. Around 55% to 45%. When I tested MPC Crafty in 1/0 and 2/0 (and even >longer, I think up to 20/0) Ruffian basically butchered it. It got better as the >time controls got longer though. I guess only more test games at longer time controls would tell the truth, but even without doing this I think that MPC is not a real improvement as it seems. Robert
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