Author: Scott Gasch
Date: 23:02:44 10/08/99
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I hate to follow my own posting but I solved this problem and wanted to share the solution in case it helps anyone else. First of all, I was counting a hit as a signature match in the hash AND a usable node (depth was enough to be useful). Some others count any signature match as a hit. This difference was part of the problem. When I started counting the same way as others I noticed my hash rate was 49.97% on Fine 70 (see previous post). This lead me to suspect something was wrong with side to move which turned out to be true. Black to move positions were overwriting white to move same positions and vice versa. So now the hash rate is near 100% on Fine 70 which makes me happy. Unfortunately this bug fix did not decrease the size of my search tree as I had intended... Dr. Hyatt has searched like 90k positions at 20 ply in Fine 70 whereas I have broken a million at that point. I am still searching for this bug and I am reasonably sure my move ordering is good. That said, what is the point of having a root move list in Think()? Scott
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