The Guatemala Defence arises after 1.e4 b6 2.d4 Ba6. ECO code: B00.

This unusual continuation of Owen's Defence sees Black developing the bishop to a6 rather than b7, targeting the f1–a6 diagonal and preventing White from castling kingside easily. The bishop on a6 can become misplaced if White plays Bd3, but it creates immediate tactical problems for the unwary.