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Subject: Re: null-move vs non-null-move

Author: Tony Werten

Date: 00:05:28 10/10/02

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On October 09, 2002 at 23:06:48, Robert Hyatt wrote:

>
>
>I had to stop the experiment sooner than I wanted, but I did find some
>interesting things out.
>
>1.  at _very_ fast time controls (40 moves in 1 minute) null-move completely
>destroys non-null-move
>by a ridiculous margin.  (this ended something like 60 wins, 5 losses, 8 draws)
>
>2.  At longer time controls (40 moves in 10 minutes) non-null-move catches up
>somewhat.  It still loses
>far more than it wins, but not _nearly_ so bad as test 1.  (this was closer, but
>with fewer games played)
>
>3.  At 40 moves in 60 minutes, things close up even closer as the data I
>previously posted shows.  The
>margin ended up at 13.0  /  22.0 in favor of null-move. (null won 8, lost 4,
>drew 10)
>
>4.  I wonder what would happen at longer time controls.  Note that these were
>run on 550mhz processors, going to cpus 4x faster might close the gap even
>farther...
>
>food for thought...
>
>I don't know what 13/22  turns into, rating wise,  18/24 would be +200, so this
>is significantly less than
>+200 overall.

Can't say I'm suprised. If nullmove gives 2 ply (wich is what is generally
accepted ) then you're basicly doing (n vs n+2) matches wich get less unequal
with bigger n.

Tony




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