[Bug-gnubg] documentation: algorithm for calculating "must use both die"

[Kenny Rosenblatt]

Hello,

 

Can anyone point me in the right place in the GNU backgammon source or anywhere else that will help show me the algorithm used when a player has the ability to use both dice, but attempted to use only one?   I am trying to prevent someone from making a move with only one die when there is a move available that would use both.   Any suggestions or links are appreciated.

Thanks

Kenny