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Subject: Weird things with hash tables.

Author: James Robertson

Date: 20:42:41 02/23/99

I have added what I think are hash tables. But, there are several things that
have me worried: the biggest is that the pv will often change, e.g. in ply 6
without hash tables one move will be chosen while in ply 6 with hash tables
another will be chosen. Is this normal?
From the starting position I am getting maybe 31% hash hits if the q nodes are
not counted.
I am getting almost 1 ply extra on average if I set the tables to 2 ^ 18
entries. Are these normal?

Thanks,
James

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