I must concede that if I lost all rationality and endeavored to help white checkmate me with his lone remaining knight, it could happen. In my experience, no other server or chessclub that I've encountered interprets the rule in this fashion (so as to take into account "help mates" rather than possible forced mates) -- but the FIDE drawing rule seems to support that, somewhat vaguely, by its simple reference to "possible" moves -- and help mates ARE certainly "possible," albeit utterly unrealistic in competitive play. .
So thanks to all who did so for clarifying this matter -- and since in every other respect this club vastly exceeds expectations, I will admit defeat without bitterness.
So thanks to all who did so for clarifying this matter -- and since in every other respect this club vastly exceeds expectations, I will admit defeat without bitterness.