Diamonds always slide off. Hearts slide off if the new card is higher.
Clubs slide off for higher Club or any Spade. Spades slide off only for a card in the same rank in another suit - or an Ace, which can always slide on.
Reach TRIUMPH by aligning 3 of the same rank in a row or column before the deck expires. Discover RUIN if you have no more valid moves or run out of cards.
Strategic risk taking is encouraged with the 10-game streak scoring system.
Watch out for the Jokers - they will automatically replace your middle card.