king has no and is considered a normal ; a player wins by eliminating all the opponent's men. The pieces move normally, except that pawns have no initial two-step option, and besides their normal one-step move straight forward, can move one step diagonally forward. A piece captures an enemy piece by jumping it: As in draughts, jumping is always mandatory, multi-jumps are possible, and the multi-jump chosen must capture the maximum number of pieces possible. (If more than one jumping sequence captures the maximum, the player may choose.) The pieces captured in a multi-jump are not removed from the board until the end of the turn. A pawn promotes to queen when it crosses the centre line of the board. A pawn jumping over the centre line both promotes and immediately ends the turn (i.e. no further jumps are allowed). Dunce's chess Also known as Advancing chess, the game has simple rules: Moves, captures, and checks are restricted to straight forward or diagonally forward directions. (Sideways or backwards is not permitted.) Pawns do not promote. The game is won by checkmating or stalemating the opponent. Variations Semi-queen chess Also known as half-queen's chess, the game introduces two additional pawns and two new pieces per side, the "ugly-named Biok and Roshop". Game rules The Biok makes non-capturing moves like a bishop, and captures like a rook. The Roshop makes non-capturing moves like a rook, and captures like a bishop. As a result, the Roshop "has the great advantage of being able to change from one colour system of squares to the other when required" . Variation {{Chess diagram 10x10 small |tright | |rd|md|ed|bd|qd|kd|bd|ed|md|rd |pd|pd|pd|pd|nd|nd|pd|pd|pd|pd | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |pl|pl|pl|pl|nl|nl|pl|pl|pl|pl |rl|ml|el|bl|ql|kl|bl|el|ml|rl |<small>Semi-queen chess extension</small> }} Parton defines an extension having no additional pawns and a pair of Bioks and Roshops per player. Black and White chess Also known as Black and White Marseillais chess, this game follows a simple rule: each player makes two moves per turn, first with a standing on a white (light) square, then with a man standing on a black (dark) square.