Re: [gnugo-devel] cosmic patch

[bump]

> Previously the Zobrist numbers never had any effect on the reading
> (except in the extremely unlikely occurence of a board hash
> collision). The new cache together with Evan's killer heuristic
> changes this. The Zobrist numbers affect the placement within the hash
> table implementing the cache. More to the point they affect which
> positions/read routines/targets/komasters compete about the same
> entries in the hash table. Due to the design of the new cache, it
> doesn't matter much with respect to performance if some cached result
> has to move out of the way, but it can affect the killer heuristic and
> thereby the result of the reading.

OK ... in any case Arend was right when he wrote that the problem
isn't with the cosmic patch.

Dan