It's check, mate.
Ever since the lads saw a chess computer game at the Cruachan visitor centre, they've been fascinated by it.
Here's Andy, shortly after he ruthlessly wiped my Queen off the board. Of course, it was a deliberate mistake, and I, er, meant for him to do it. Obviously. I mean, as if I'd really get outfoxed by a four-year-old.
Actually, beyond telling them how all the pieces move, I'm not going to be much use to them if they turn out to be chess prodigies.