[Bug-gnubg] Bug: Match statistics

[Joachim Matussek]

Hello, 

here is an GnuBG "Match statistics/Overall" that confuses me a bit.

Overall Statistics:
Error rate (total)                      -0.862 (-17.348%)       -1.897 
(-30.602%) 
Error rate (per decision)               -17 ( -0.340%)          -41 ( -0.665%) 
Equiv. Snowie error rate                -9                      -19 
Overall rating                          Intermediate            Awful! 
Actual result                           +18.25%                 -18.25% 
Luck adjusted result                    +2.42%                  -2.42% 
Luck based FIBS rating diff.                    +48.50 
Error based abs. FIBS rating                    1791.0          1468.8 
Chequerplay errors rating loss  239.6           515.2 
Cube errors rating loss                 19.3            66.0 

I am used to find +50% and -50% as "Actual result". The file was imported as 
Snowie standard text format. As it seems that the spam filter deletes my 
messages with attached files you can find it here

http://home.arcor.de/joachimmatussek/1.txt                        
http://home.arcor.de/joachimmatussek/1.sgf


I have found another output in "Match statistics/Luck" that confuses me.

Luck Statistics:
Rolls marked very lucky                 1                       1 
Rolls marked lucky                      1                       2 
Rolls unmarked                  57                      58 
Rolls marked unlucky            3                       1 
Rolls marked very unlucky               0                       0 
Luck rate (total)                       -0.699 (-33.537%)                       
+0.022 ( -2.752%) 
Luck rate (per move)            -11 ( -0.541%)          +0 ( -0.044%) 
Luck rating                     None                    None 

This is an "Match statistics/Luck" output of a match GnuBG played against 
itself. What makes me curious is "Luck rate (total)" for player2... +0.022 ( 
-2.752%). The algebraic sign changes from + to -.  

http://home.arcor.de/joachimmatussek/2.mat                        
http://home.arcor.de/joachimmatussek/2.sgf

GnuBG Build 1590. Windows version. All analysis was done 0-ply.

Joachim Matussek

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