Make pyramid cards one line. Pyramid is one of the best-known and well-loved solitaire card games. It's easy to learn, but difficult to win, and offers plenty of room for skillful play. As you play the game more, you'll find that there is more to it than appears at first glance.
Pyramid is one of the very best of the "simple addition" games, where the object is to remove pairs of cards totaling a certain amount (in this case, thirteen).