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Re: [Bug-gnubg] Largest swing yet between 0-ply & 2-ply

From: Joern Thyssen
Subject: Re: [Bug-gnubg] Largest swing yet between 0-ply & 2-ply
Date: Tue, 8 Apr 2003 12:00:00 +0000
User-agent: Mutt/1.4i

On Tue, Apr 08, 2003 at 12:45:56PM +0100, Ian Shaw wrote
> This is the first time I've seen a swing of over 0.5 between 0-ply &
> 2-ply. I thought you, particularly Joseph, would be interested. It's
> even larger on a centred cube, at 0.547.

If you look the at the cubeless equities they hardly change for bar/21
6/5: 0.231 to 0.217. The difference is much larger for the the safe play
0.063 to 0.347. 

A rouch approximation for money play and "normal" match scores is that
the cubeful equity is 3/2 times the cubeless equity (for a centered
cube). So the cubeless difference of 0.280 goes to a cubeful difference
of approx. 0.42.

I don't find it particular disturbing. I think you can find many
positions where is really vital to look 2 or more plies ahead to get
accurate equities.


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