A game that was basically an IQ test might work as well. Like having to solve those abstract pattern matching or 3D-to-2D geometry questions. Maybe. I'd guess t

A game that was basically an IQ test might work as well. Like having to solve those abstract pattern matching or 3D-to-2D geometry questions. Maybe. I'd guess there's some slight advantage to having answered many of such questions, but I doubt it is nearly as big a difference as, say, studying Chess or Go.