Mahjong is a puzzle game based on a classic Chinese game for four persons. The goal is to remove all 144 tiles from the board. You may remove only paired free tiles. The tile is free when there are no tiles either to the left or to the right from it.
Paired (or "equal") tiles are:
- any two exactly the same tiles
- any two of four "flowers" tiles
- any two of four "transport" tiles
Keyboard: H for hint, U for undo, Shift-N for a new game, B or ESC to make a pause.