Christmas Tree Mahjong Solitaire - Version 1.0 Christmas Tree Mahjong Solitaire is mahjong solitaire with a fun holiday theme. Break down the Christmas tree one pair of tiles at a time by selecting matches to make them disappear. And when you beat the game, kick back and enjoy the fancy snow-flake graphics that are displayed on the screen. It'll have you coming back for more, as you try to beat your high score, displayed at the bottom of the screen. This is a free online mahjong solitaire game.