Slope

Should there be no winner when no empty board spaces remain, the game enters slope mode. In slope mode, a stone may be placed on top of any existing stone. The stone that was in that space slides down into the space below. Any stones below that stone move down as well.

Cautions: The only space a stone cannot be placed is where the opponet placed a stone in the preceding move. if 5 of both stones are in a row, the person who did it will lose.
Slope is a free online flash game that you can play at game2p.com. Click play Slope on normal mode to play Slope now!!