If true PolyGlot will not understand xboard commands.
-=item B<MateScore> (default: 10000)
+=item B<MateScore> (default: 0)
Mate score reported to GUI when in xboard mode.
+When set to 0 it uses the new CECP convention of reporting 100000 + N
+for mate in N moves, and -(100000 + N) for mated in N.
=item B<Book> (default: false)