Play Yin Yang Mahjong, a Mahjong Solitaire game.
Yin Yang Mahjong
Instructions for Yin Yang Mahjong
Combine 2 opposite tiles and try to find the Yin and Yang tiles. As soon as you combine the Yin with the Yang tile, you advance to the next level. You can only combine free tiles. A tile is free if not covered and if it has at least 1 free side (left or right).