To choose a move, start by looking at the obvious consequences of the action that triggered it. If you already have an idea, think on it for a second to make sure it fits your agenda and principles and then do it. Let your moves snowball. Build on the success or failure of the characters’ moves and on your own previous moves. If your first instinct is that this won’t hurt them now, but it’ll come back to bite them later, great! That’s part of your principles (think offscreen too). Make a note of and reveal it when the time is right.
RULES OF PLAY: MOVES SNOWBALL Any given conflict between characters, one move alone probably won’t resolve it. Very often it’ll take several moves and counter-moves, a whole back-and-forth between them. Hitting rolls on a 7–9, especially, usually leaves a whole lot unresolved, primed for followthrough or a counterstrike. The moves cascade very naturally. Holds overlap, outcomes nest and double up and flow seamlessly into new moves. Just remember the rule — if you do it, you do it; to do it, you have to do it — and see their logic through.