The iron cannon captures in the same way as the copper cannon, but can only move by leaping over an intervening piece, called a "screen". The iron cannon may promote (optionally) to a flying iron cannon if it begins or ends its move in one of the last 3 ranks of the board. As a flying iron cannon it has the same powers as the flying copper cannon. It may therefore move diagonally over whole rows and is able to leap one piece while moving. It can also move one square orthogonally, or move or capture two squares orthogonally, by leaping an adjacent piece.