CC–PP (or Cayley–Pauli) is a two-player game that is played using several tokens and two pieces of paper (or "boards"). The two players are called the C (for "challenger") and the P (for "provider").
In each round of the game, C and P take turns placing their tokens on the boards. They can put the pieces anywhere they want, but they have to make sure that none of their pieces overlap. When all the pieces are placed, C and P will have created a pattern on their boards.
After all the pieces are placed, C and P then guess what pattern they each made. If they both guessed correctly, they each get a point. If one of them guesses wrong, the other person gets two points. The game continues until one player has six points, at which point they win the game.