The rules are simple: Ace = 1, King = 13. Select any two exposed cards (or the King by itself) with a combined face value of 13 to remove them. You can select cards with no other card touching its bottom border or from either of the two 'crib' piles. It will highlight in gray when there is no card touching its bottom border. The arrows can be used to reverse the flow through the crib piles. 'Winning' involves clearing out the pyramid and the crib.