Bill Spight wrote:
However, it may also be an example of rule 13: Both players lose because they have left a gainful play on the board. 
AFAIK, that rule has never been invoked in professional play. But I doubt if it has ever been invoked in amateur play, where it could well occur.
AFAIK, that rule has never been invoked in professional play. But I doubt if it has ever been invoked in amateur play, where it could well occur.This clause always made me think of a parent disciplining their fighting children -- If you can't agree to play nice, then you both lose!