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Subject: null move question(Fruit)

Author: Jan K.

Date: 17:50:14 07/22/04

Hi, i have seen in fruit and in other engines too that there is no test if
(remainingDepth-rFactor-1)>(=)0 before doing null move, only
remainingDepth>=someConstant, which means making many cutoffs based only on the
values given by qsearch. That gived a very nice speed up when I tried it, but I
soon found that my engine makes mistakes in some positions like this one, where
it shows a draw after <almost every move> <e6e2> <d3c4> <f7g6> <c4d3>, altough
only <d3c4> doesn't lose(normally seen at depth 5):
[D]8/5kpp/4rp2/2p5/PP1p4/3Q2PP/2P2q2/R1B4K w - - 3 30
it didn't help when I used verification search, checks in qsearch....
But Fruit doesn't seem to have a problem so do I have a bug or just miss
something? :))

• Re: null move question(Fruit) Johan Melin 12:01:21 07/23/04
• Re: null move question(Fruit) Fabien Letouzey 04:09:51 07/23/04
  • Re: null move question(Fruit) Pham Hong Nguyen 05:16:36 07/24/04
    • Re: null move question(Fruit) Fabien Letouzey 02:29:33 07/26/04
  • Re: null move question(Fruit) Jan K. 07:09:36 07/23/04
    • Re: null move question(Fruit) Volker Böhm 02:17:33 07/24/04
    • Re: null move question(Fruit) Uri Blass 10:02:12 07/23/04
    • Re: null move question(Fruit) Fabien Letouzey 07:47:47 07/23/04

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