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Subject: Re: nullmove and tactics

Author: Uri Blass

Date: 14:19:52 03/25/04

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On March 25, 2004 at 14:07:52, Aivaras Juzvikas wrote:

>well my experience is that if u implement smth incorrectly, u blunder and lose a
>piece in atleast 20 moves, i really would like u to give us an example, wot kind
>of a bug would make u win occasionally (its not like it occurs only 1 single
>time in a game)

There are many ways to implement something incorrectly.
I have a bug in my null move pruning in  the public version of movei
but inspite of it my null move pruning is productive.
I update information after every move and I simply do not update it correctly
after null move.

The information is used later in the search to decide about partial extensions
and in most cases it changes nothing.

In my case I believe that the bug is not very important(at least I did not see
big difference in the gcp test suite) but I did not test the lastest version in
games.

Uri



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