Two different rules can be used for moving cards. 1. Swap. 2. Discard. In Swap rule, card being moved goes to the destination pile and card in the destination pile is removed to the waste pile. In Discard rule, card in the destination pile is kept and card being moved is discarded to the waste pile. Cards are simply matched and moved accordingly. You need to remove all cards except one to win. Features: Save game state to play later; Unlimited undo; Game play statistics.