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From: | jorma kala |
Subject: | Re: [Bug-gnubg] Gnubg - Snowie error rate comparison |
Date: | Tue, 13 Nov 2007 13:45:34 +0100 |
Hi,
how is the total error rate and the per move error rate exactly calculated?
Is it just the average difference in MWC of each unforced move with respect to the MWC of the optimal move?
Thanks.
jormaOn 11/10/07, Christian Anthon < address@hidden> wrote:Snowie and GNU backgammon calculate error rate differently
From an example game:
Chequer Play Statistics:
Total moves 26
Unforced moves 22
Cube Statistics:
Total cube decisions 4
Close or actual cube decisions 3
Error rate (total) -0.145
Error rate (per decision) -5.8
Equiv. Snowie error rate -2.8
gnubg error = 0.145/(22+3)*1000 = 5.8
snowie error = 0.145/(26*2)*1000 = 2.8
So as you can see GNU backgammon attempts to use the number of actual
decisions, while Snowie only uses the number of moves. In my
experience the factor between the two error rates is closer a factor
of 2.
Christian.
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