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Subject: Re: Nullmove problem

Author: Odd Gunnar Malin

Date: 05:52:41 11/22/01

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On November 21, 2001 at 23:55:39, Michel Langeveld wrote:

>On November 21, 2001 at 19:11:53, Odd Gunnar Malin wrote:
>
>>On November 21, 2001 at 18:23:08, Michel Langeveld wrote:
>>
>>>I build nullmove in my chessprogram and received a problem.
>>>
>>>The example which is on Bruce side seems not to work in certain positions.
>>>Especially positions where it's possible to give mate:
>>>
>>>[D] rnbq1bnr/pp2k3/2p1p1B1/3pP1p1/7p/4PQ2/PPPN1PPP/R3K1NR b KQ
>>>
>>>After Qc7 white doesn't see Qf7 anymore.
>>>
>>
>>Are you using nullmove at the first ply?
>>
>>Odd Gunnar
>
>No at the rootnode I don't do nullmove.
>Is this ok?

Yes, I was only trying to figur out what could happend.

After Qc7.

You try Qf7
Black is in check so no nullmove here, OK?
Kd8 only move
Qe8#

Maybe a bug in the mate test then.

Odd Gunnar



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