After the overwhelming Smartgambler response to my AFL Top 8 quiz, here's an encore. Again original, as far I know.

Golfer A only pars, birdies or bogeys holes. With equal likelihood.

His identical twin B is 1 stroke behind A, with H holes to play.

No playoff if they finish equal.

What is the chance of B overtaking A for H = 1, 2 or 3?

Answer only for the highest H you are confident about. That way others unfamiliar with the techniques can still tackle whatever level they find challenging.