nabla: Yes, it's impossible to detect, especially as it would only be done for an occasion move but it would be as well to spell it out in the User Agreement. Whenever someone's asked something like that on the Backgammon board it's been pointed out that the game is in progress and it would be unfair, but most often the person asking knows this and asks after the move anyway. If someone's playing me and they want me to advise them on what's best for their next move, lol, well, we can cheat together and hope that nobody tells! :-))