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Re: [Bug-gnubg] Gnubg - Snowie error rate comparison
From: |
Christian Anthon |
Subject: |
Re: [Bug-gnubg] Gnubg - Snowie error rate comparison |
Date: |
Sat, 10 Nov 2007 00:30:45 +0100 |
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.