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Subject: Re: MTD(f)

Author: Tord Romstad

Date: 02:58:20 07/29/04

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On July 28, 2004 at 18:48:05, Dann Corbit wrote:

>If you use PVS, then a resolution of 20 significant digits is the same as 3
>digits for speed.

Not quite.  Even with PVS, you will reduce your node count if you decrease
the resolution of your evaluation function.  The reason is that you will
get a bigger number of beta cutoffs.

Consider the extreme case of having an evaluation function which always
returns 0.  You automatically get perfect move ordering, and you will
search really small trees.  Your eval will also be very cheap to
compute.  On the other hand, it could hurt the engine's positional
play a bit.  :-)

Tord



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