[Bug-gnubg] Simple playing strengths

[Jonathan Kinsey]

The way you currently set the playing strength of gnubg isn't great.  For a 
beginner all the options are meaningless, for a more experienced player the 
settings don't easily relate to actual strength.

A simple idea is to replace the current player->settings with just a single 
combo-list (with the 8 strengths).  The idea is that both the chequer and 
cube settings will be set to this value.  An "advanced" button could then 
pop up all the current settings.

BTW, does anyone now roughly what fibs ratings the current preset settings 
map to?  Perhaps the settings could be tweaked slightly to broaden the 
playing range and differenciate more between settings.  This is because I 
often hear people (beginners) say "it's too hard/good even on the easiest 
setting" and "it doesn't seem any different between setting [x] and [y]".

Any thoughts?

Jon