From Box Back:
"Two players can take part in the game the object of which is to be the first to complete the puzzle. Outwit is a fast, challenging game where the perception, imagination and intelligence of each player is tested.
"The box contains 2 plastic boards, 16 big plastic pieces of various geometrical shapes, 4 rectangular pieces and 12 small square pieces.
"Each player attempts to solve the puzzle by trying to fit a chosen set of geometrical shapes on to his/her board without moving any of the existing pieces placed by their opponent.
"The winner is the first person to correctly fill all the gaps with the geometrical shapes."