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Subject: Re: Crafty questions, singular.c

Author: Engin Üstün

Date: 13:00:01 08/04/05

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i have a question to Robert Hyatt too.

some days ago i read in your crafty source about "singular.c" to extend a move
if this scores better then all other moves, i haved experemented with this
singular extension in my program Tornado, but i don't see any changes or efects
or any speed up with this extension and remove it from my source.

The search down more and more if the engine searching deeper.
Why using this idea, if this cost more time in search and get nothing for this.
if we know that a move is better then other ones, we don't searching any other
moves.

And i don't see in other sources about singular using this idea.

The other question is, why you don't using in crafty the history pruning, this
brings in search near 3-4 ply deeper in my program.

The idea i have taken a little from Fruit :) and implemented with my own ideas.








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