Select two identical tiles to remove them. Once all tiles are removed, the game is won.

Only open tiles can be selected, meaning that they are on top and at least on one of their sides (left, right) there is no tile.

It may happen that you make a wrong move after which the game cannot be won anymore.

There are 144 tiles in total. They fall into 7 categories (dots, bamboos, characters, winds, dragons, seasons, flowers). Every tile appears exactly 4 times, except for the 4 seasons

and the 4 flowers

which each appear only once. For this reason every pair of seasons (or flowers) can be removed as well, even if they are not identical.