Our flagship game for two or more players, with any size pack. Share a prime factor, play a lower number, or draw and reset. Be the first to empty your hand, and call “chükö!” when you have one card left.
A solitaire game with 12 cards in three rows of four. Build a caravan by connecting cards that share a prime factor, turning up to two available cards face down as bridges. Use all 12 cards and complete every bridge to win.
A two-player game with 12 cards in a shared layout. Take turns choosing cards to build your own trail, scoring a point for each prime-factor connection. Plan your moves around the cards you leave for your opponent.