[Bug-gnubg] snowie error rate info

[Hugh Sconyers]

hi

thought info might be of some help.

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In the summary panel, only the most important numbers are displayed. First, 
the normalized error rate for both players is drawn in a graph. This 
normalized error rate is computed in the following way. For each player, all 
the normalized errors (cube and checker play) are added together and then 
divided by the total number of moves. The total number of moves is also 
displayed on the bottom of the window. In order to get a sizeable number it 
is then multiplied by 1000.

Based on this normalized error rate, a classification of the players 
strength is estimated and displayed next to the two player names. This 
mapping is done as follows below. You may also press the button 'levels 
info' in order to display this mapping in the statistics window.

0.0 - 1.2: Extra-terrestrial
1.2 - 4.4: World class
4.4-5.9: Expert
5.9-8.8: Advanced
8.8-12.6: Intermediate
12.6-18.5: Beginner
18.5 - ??: Novice

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keep in mind that snowie uses a divisor equal to the 'total moves'

regards

hugh