Perpetual check Occurs when a player checks the preceding player in unending succession. If only one player remains, that player wins. Otherwise all active players draw. If only one player remains, that player wins. Pawns moving toward each other from opposite directions capture as in normal chess.
Pawns moving at right angles to one another involve two capturing situations.
The pawns may be attacking each other, or one will be attacking the other from behind. In the latter case, the attacked pawn cannot capture the attacking pawn. Any pawn reaching the opposite first rank must promote to the player's choice of Rook, Bishop, or Knight. First the King must reach the diagonally opposite square from its starting position. On the next legal move, if the King can and does move to an adjacent square, a Queen of its color is placed on the corner square.