🚀 go-pugleaf

I would like to make a gnuchess.book using the main lines in MCO13.  However, I
dont know which lines to include, ie some are much better for a certain side.

1) How does gnuchess keep track of which lines are good or bad?  That is the
whole point of having the book be a hashtable, right?  So that it can learn 
from its opening mistakes or those of its opponents?  It must have some way of
associating with a critical position a MOVE NOT TO MAKE or a MOVE TO MAKE,
depending on its color?!!

2) Does the hashtable remember the last N lines, or does it just fill up and
stop changing?


I realize I can make TWO books, one for each side, but maybe that is not
necessary..  Please someone help me!