FarmersMahJongg will create a game setup from which you must try to remove all tiles. You can remove them only in pairs by pulling the tiles either to the left or the right. The tiles must lie along the edge of one of the tile levels.
You can undo a move or let the computer suggest possible moves. If you failed to solve a setup you can decide to restart the last game in order to try another solution. But remember that currently there is no guarantee that a board really has a solution!