[Bug-gnubg] Using weights files of different sizes

[Ian Shaw]

Hi,

Is it possible for someone to modify gnubg to have weights files of different 
dimensions for contact, race and crashed nets?

Øystein Johansen and I have been messing around with training gnubg for a 
while. We have managed to train a contact net that plays a little better than 
the current net against both the benchmark and the current net itself.

The inputs and outputs are the same; the downside is that it far larger, having 
512 hidden nodes rather than the current 128. This may render it unsuitable for 
use, since it will slow the evaluation speed considerably. Given the current 
speed advantage already reportedly enjoyed by Extreme Gammon, this may be too 
much of a penalty for what will surely be a modest performance boost.

Still, it would be interesting to have it available, and so gnubg would need to 
be able to determine the structure of each set of weights as it loads them. And 
who knows, one day we might be able to get improved performance with a 
smaller-sized net, in which case the flexibility would be beneficial.

-- Ian Shaw