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Subject: Re: MTD(F) results

Author: Dann Corbit

Date: 13:37:15 12/17/03

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On December 17, 2003 at 05:38:52, Tord Romstad wrote:

>On December 16, 2003 at 21:22:56, Anthony Cozzie wrote:
>
>>Recently I experimented with adding MTD(F) into Zappa.  It has been an
>>interesting experiment, but I am going back to PVS().
>>
>>I thought that since Zappa has a [UL,LL] paired transposition table and an
>>evaluation granularity of only 1/100 of a pawn,
>
>I use 1/64 of a pawn in Gothmog.  In the new engine I am writing, the
>granularity will be configurable by the user, with possible values between
>1/8 and 1/512 of a pawn.

Here's an idea:

Start searching with a granularity of (a-b)/k,
and for every iteration change the granularity to the new value.

The values a and b are the start and end of the search interval being searched
and k is some integer constant used to tune the program (e.g. 8).




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