This is the simplest variation of the game. There are 12 pairs of cards and is played by 1 player who is trying to find the matching pairs.
This variation of the game has 24 pairs of cards instead of 12.
The duel is played by 2 players and each one of them has his own deck. The first player opens a card from his deck and the second one has to find the same card in his deck of cards.
In this variation of the game, 2/3/4 players are playing in the same deck of 12 pairs of cards.
The only difference in the switchPlace variation is that each time two different cards are opened they switch places.
This variation of the game does not contain pairs but either triplets or quadraplets.