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Subject: Re: History Heuristic

Author: Renze Steenhuisen

Date: 08:12:34 03/16/04

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On March 16, 2004 at 09:51:00, Pat King wrote:

>On March 16, 2004 at 04:41:40, Renze Steenhuisen wrote:
>
>>
>>Hi all!
>>
>>I did some measurements on my move-ordering, and it seems that the positive
>>effect of the History Heuristic wears of with increasing search depth? Is this
>>observed by others as well or am I doing something awfully wrong here...
>>
>>
>>History Heuristic:
>>
>>    int table[64][64];
>>
>>    every time the 'best move' was found (either fail-high or all moves
>>    searched)
>
>"All moves searched" = fail low = move ordering doesn't matter here. I think you
>ought only store fail-highs in the history table. It will lose its effectiveness
>more slowly that way.

Have you had any success with this way of applying the HH or is it just a
suggestion? It doesn't seem to work here, or I am not counting my move right!

Cheers!



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