The game is a classic memory game made up of pieces that feature a figure on one side. It was created in China in the 15 century and consisted of deck of illustrated  and doubled playing cards. Each figure is repeated in two different parts.

To start the game, the pieces are put with the picture face down, so that they cannot be seen.

In the classic game, each participant must, in turn, flip two pieces and let everyone to see them. If the figures are equal, the participant must collect this pair and play again. If they are different parts, they shall be turned back, and pass the turn to the next participant.

In the online version, you must find the pairs of figures as quickly as possible.