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Re: [Bug-gnubg] Training of the crashed neural net. What would help?

From: Øystein Johansen
Subject: Re: [Bug-gnubg] Training of the crashed neural net. What would help?
Date: Tue, 05 Oct 2004 23:36:37 +0200
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Joseph Heled wrote:

| While I am aware of the "containment" problem, this does not seem one of
| them.
| The rollout give me 82%+0 18%+2.6%
| This seems reasonable since if you close the board and pick the second
| checker you get 86%
| Can you please be more specific?

The position didn't originate from me. It comes from a poster who calls
himhelf (or herself) 'rew'. He/she writes:

I've seen gnubg misevaluate this kind of position time after time..

<image of the board />

Alert: wrong double ( -0,1520)! [bad]

Cube decision
2-ply cubeless equity   +0,3013 
~       67,40% 0,00% 0,00% - 32,60% 4,03% 0,64%
Cubeful equities:
1.      No double       +0,5346 
2.      Double, pass    +1,0000 +0,4654
3.      Double, take    +0,3826 -0,1520
Proper cube action:     No redouble, take (24,6%)

A quick 0ply rollout indicate that the position is a small pass. As many
know, after closeout, you would need 11 off to take..

<end of quotation>

My posting to the mailing list was more like a general suggestion and
trying to bread some ideas... nothing else.

- -Øystein

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