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Subject: Re: Null move and move ordering stats

Author: Severi Salminen

Date: 00:30:13 12/20/01

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>Either you have extremely good move ordering, you have a bug, or you're counting
>in quiescence search also, which is "cheating". 96% is very very high. Crafty
>gets 90% here.

I also tested with Crafty and did a search to same depth than on Requiem and got
worse percentage and wondered waht causes the difference. You were right, I
_was_ counting in qsearch also (I had thought it was the standard), BUT: when I
removed the calculation in qsearch the figure increased by 0.2 (95.9% -> 96.1%).
And without null moves it was still 98.9%. So I guess I have an "extremely good
move ordering" :) But it was only this position, on other positions the figure
might be lower (or highr on the other hand).

This is how I calculate (this is done, if score>=beta):

FailHighCount++;
if(moves_searched==1)
  FirstMoveFail++;

This is not done in rootnode, so it might bias the results ;)

Severi

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