Object To remove from the tableau all the cards of the opposite color to the Knight (Jack). Layout and play Tableau (25 cards in 5 rows of 5) By moving the Jack (Knight) to the positions occupied by the cards, remove from the tableau the cards of the opposite color to the Jack. The Jack moves according to the chess rule: "from corner to diagonally-opposite corner of a rectangle three squares by two"; in other words, Jacks move one place up, down or sideways plus one place diagonally.