I used to play board games with people like that, and the problem is easily fixed with a kitchen timer :) Timer goes off? Turn over, too bad. Given the average

I used to play board games with people like that, and the problem is easily fixed with a kitchen timer :) Timer goes off? Turn over, too bad. Given the average number of turns in a game and how long you want to play for, you can work out what to set it at (maybe with a 25-50% leeway) An interesting variant is to put the timer in a box so that you don't know how long you have left.