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Subject: Re: How to order moves (& others)

Author: Peter Fendrich

Date: 13:19:34 03/30/00

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On March 30, 2000 at 11:07:16, Robert Hyatt wrote:

>On March 30, 2000 at 06:04:42, Jan Pernicka wrote:
>
>> Hi,
>>I have several questions:
>> 1) How do you order your moves to get as much cutoffs as possible
>>     (more than methods - captures,PV,killers... I'm interested in their
>>    "order of importence" - i.e. which one goes 1st,2nd ....)
>
>Here is mine:
>
>1.  hash table move.
>2.  captures that don't appear to lose material using a SEE procdedure,
>ordered from biggest gain to equal exchanges.
>3.  2 killer moves.
>4.  up to 4 history ordered moves (history heuristic)
>5.  rest of the moves.

In 2. I first do captures where the capturing piece is worth less or same as the
captured piece. In this way the SEE function is not needed at all in many
obvious situations.
I think Crafty did the same, at least some year ago?

//Peter



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