This online Mahjong game is called Coffee Mahjong probably because the stones in the game have pictures of different coffee items on them. Your challenge in the game is to combine two of the same Mahjong stones to remove them from the playing field. Remember that you can only combine the free stones. Now a free stone is the one not covered by another stone and at least one side of it is open. As you take part in the game play, you will need to be in a hurry because the levels of the game are time based. The hint option in the game helps big time especially when you cannot figure out any more combinations.