Wasn't sure where to put this. No general "games" section and it's not a sport...
I have tried googling this, before I get a JFGI response.
DS wants to know what you do if your king is the only piece left, and is OK where he is sitting but would put himself in check by moving a square in any other direction.
Do you have to move him?
Is that check mate?
I ought to know this but I don't.