Author: Dan Honeycutt
Date: 16:54:28 08/27/04
Does anyone have an opinion if it is better for an engine to play itself or other engines when trying to determine if a change is an improvement? I had two versions of my engine, old and new, identical except for one difference (new did checks in 1st ply of qsearch, but my question is general). I played old and new in a tourney against themselves and 3 other engines, 1 stronger, 1 weaker and 1 about equal. After a week and a half and nearly 1000 games I found new was better than old against all three of the other engines, but lost head-to-head against old. This can't be; error margin I figure. So I burned another week and a half of computer time and got the same result. Does this make sense? With results like this, how does one know if a change is any good? Any advice/opinions appreciated. Dan H.
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