[Bug-gnubg] luck analysis suggestion

[O.M. Riordan]

I have a suggestion about luck analysis, namely to have an option to
increase the depth of the analysis used (probably 1-ply analysis of each
roll rather than the current 0-ply is most likely to be useful). 

(Better luck analysis would be very useful for comparing gunbg with other
programs - the quickest way to get stastically significant results is to
use unbiased luck analysis on matches between them; the current analysis
is not good enough to give quick convergence, as shown by analyzing sample
matches and comparing the appropriate sum/difference of luck and error
rates with 50%. Using deeper analysis, together with results from Tony
Lezard's Dueller, it should be practical to compare gnubg with the rather
more expensive Snowie 4; since the difference in strength seems likely to
be small, this would be good for gnubg.)

Oliver Riordan

P.S. I noticed that the changelog says that luck analysis has been changed
to use cubeful analysis, whereas this is not the case. (There is still a
FIXME in analysis.c about thsi.)