I never tried to optimize stopping, so my stopping rule is very conservative.  
Many Faces stops at twice the number of points on the board, or if the mercy 
rule triggers.  The mercy rule requires one side to have many more stones on 
the board than the other (at least 1/3 of the number of points on the board 
more).

 

David

 

From: Computer-go [mailto:computer-go-boun...@computer-go.org] On Behalf Of 
Erik van der Werf
Sent: Wednesday, September 09, 2015 9:18 AM
To: computer-go
Subject: Re: [Computer-go] re good article on playout ending

 

Steenvreter stops its playouts when it detects a proven win or loss. The 
evaluation function it uses is an improved version of what I made to solve the 
small boards. I once tried adding the mercy rule, but it did not improve the 
program.

 

Erik

 

 

On Wed, Sep 9, 2015 at 5:46 PM, Peter Drake <dr...@lclark.edu> wrote:

I don't know of an article, but unless your ending detection is VERY fast, it's 
better to just finish the playout.

 

One possibility is a "mercy threshold": if one player's stone count (which you 
update incrementally) far exceeds the other, declare the player with more 
stones the winner. The relevant class from Orego is attached.

 

 

On Wed, Sep 9, 2015 at 7:53 AM, Gonçalo Mendes Ferreira <go...@sapo.pt> wrote:

Does anyone know of a good article on ending a MCTS playout early, outcome 
estimation, the quality of interrupted outcomes, and so on?
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-- 

Peter Drake
https://sites.google.com/a/lclark.edu/drake/


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