Ok, you're clever enough to know how chess works, so give yourself a pat on the back for that.

How about giving it a pop when you're half cut? We'd imagine you won't be quite as slick when it comes to mating with your rook, or whatever.

The genius behind Shot Glass Chess, however, is that the better you play, the more you have to drink. This, of course, works like a built-in modifier, so whoever starts off well, battering pieces off the board left right and centre will be thoroughly leathered by the time they get halfway through the game.

Since alcohol impairs your judgement, it's a safe bet they'll then start to make rash, ill-advised moves that will allow the less inebriated gamester to catch up. Like we said, utter genius.

Shot Glass Chess includes a full chess set of printed shot glasses, ready to be filled with whatever booze you fancy necking at speed.

Different combinations can also be used to handicap Grand Masters even further. You could be on watered down bitter and you could stick the Gary Kasparov-alike you're playing on absinthe. See how he gets on then...