Each side starts with twelve Pawns on a rectangular checkered board. The object of the game is to make the opponent run out of moves.

All pieces move in the same way, in a straight line in any forward direction (vertically or diagonally). A piece must move as far as it can in a direction; it continues until it collides with a wall or another piece. There is no capturing.

White goes first, and can move any unblocked piece. Thereafter, a player must move a piece which starts adjacent to the opposing piece which just moved. If there are no such pieces, or all such pieces are blocked, he may move any unblocked piece. The first player who cannot move loses.

This rules file allows Forge to be played on 3x4, 4x5, 5x6, and 6x8 boards.