A Sphinx moves by pouncing on an enemy. That is it slides any number of spaces along an orthogonal line (like a Rook) until it encounters a piece of either side. It hops over this piece and then continues sliding any number of squares beyond, capturing at the end. There must be a piece to leap over for the Sphinx to move and only one piece may be jumped over.

On each turn, an enemy piece must be captured. Leaps to empty spaces are not allowed. The last player to move is the winner.