Re: [computer-go] Pattern matching - example play

[Vincent Diepeveen <diep@xxxxxxxxx>]

At 12:21 2-12-2004 +0100, Erik van der Werf wrote:
>Hi Vincent,
>
>You're absolutely right that I can get far deeper using nullmove. 
>Unfortunately however, as I mentioned here before, for reasons I do not 
>yet fully understand nullmove did not increase the playing strength.
>The speed was in the order of Mnps, and the evaluation was of course 
>quite stupid. However, I should point out that these numbers are for an 
>ancient version of Magog which has very little in common with the 
>current version which is at least 5 times slower in nps.
>Erik

Nullmove works greats at those search depths. However an agressive
evaluation towards life & death is important with nullmove. It must matter
a lot when some extra move gets played near life & death for the evaluation
of life & death. That's when nullmove typically performs great.

>
>
>Vincent Diepeveen wrote:
>> With nullmove R=3 and some selectivity and good hashtables you should get
>> far deeper depending upon the total nodes you see.
>> 
>> What's the nps you get and what time does it allocate for the first few 
>> moves?
>> 
>> Vincent
>> 
>> At 00:48 2-12-2004 +0100, Erik van der Werf wrote:
>>  >Chris Fant wrote:
>>  >> 9 ply full width on 9x9?  Certainly not near the beginning of the game.
>>  >
>>  >It depends on the time settings. For tournament play it was probably a
>>  >bit less in the opening and a bit more towards the end.
>>  >
>>  >E.
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