Rollerball is a

chess variant A chess variant is a game related to, derived from, or inspired by chess. Such variants can differ from chess in many different ways. "International" or "Western" chess itself is one of a family of games which have related origins and could be co ...

invented by Jean-Louis Cazaux in 1998. The game was inspired by the 1975 science-fiction movie '' Rollerball'', specifically the futuristic and violent sport (similar to

Roller Derby Roller derby is a roller skating contact sport played by two teams of fifteen members. Roller derby is played by approximately 1,250 amateur leagues worldwide, mostly in the United States. Game play consists of a series of short scrimmages (jam ...

) portrayed in the film. The board comprises 7×7 squares with the central 3×3 section missing. Pieces generally move clockwise around the board. Each player starts with one

king King is the title given to a male monarch in a variety of contexts. The female equivalent is queen, which title is also given to the consort of a king. *In the context of prehistory, antiquity and contemporary indigenous peoples, the tit ...

, one

bishop A bishop is an ordained clergy member who is entrusted with a position of authority and oversight in a religious institution. In Christianity, bishops are normally responsible for the governance of dioceses. The role or office of bishop is ca ...

, two

rooks Rook (''Corvus frugilegus'') is a bird of the corvid family. Rook or rooks may also refer to: Games *Rook (chess), a piece in chess *Rook (card game), a trick-taking card game Military *Sukhoi Su-25 or Rook, a close air support aircraft * USS ...

, and two pawns. Both bishops are light-squared on the initial setup. Dark-squared bishops can only be obtained by pawn promotion.

Game rules

The initial setup is as shown.

White White is the lightest color and is achromatic (having no hue). It is the color of objects such as snow, chalk, and milk, and is the opposite of black. White objects fully reflect and scatter all the visible wavelengths of light. White on ...

moves first. Pieces move and capture the same as their

chess Chess is a board game for two players, called White and Black, each controlling an army of chess pieces in their color, with the objective to checkmate the opponent's king. It is sometimes called international chess or Western chess to disti ...

counterparts, except where explained differently below.

Objective

There are two ways to win in Rollerball: # Checkmating the enemy king. # Bringing one's own king to the starting square of the enemy king on the opposite side of the board (but only when having travelled to that side of the board in a clockwise direction). The same as in chess,

stalemate Stalemate is a situation in the game of chess where the player whose turn it is to move is not in check and has no legal move. Stalemate results in a draw. During the endgame, stalemate is a resource that can enable the player with the inferior ...

and threefold repetition of position are draws.

Piece moves

In general, forward movement means clockwise direction around the board; backward movement means counterclockwise direction. The squares comprising the board's inner and outer perimeters are called rings. The ring a rook or pawn currently stands on determines its

orthogonal In mathematics, orthogonality is the generalization of the geometric notion of ''perpendicularity''. By extension, orthogonality is also used to refer to the separation of specific features of a system. The term also has specialized meanings in ...

forward direction, and for a rook, its orthogonal backward direction. An orthogonal rook move in a direction immediately off its ring is called sideways movement. * The king moves the same as the king in

: one step in any direction. As in chess, a player may not place his king in check. There is no

castling Castling is a move in chess. It consists of moving the king two squares toward a rook on the same and then moving the rook to the square that the king passed over. Castling is permitted only if neither the king nor the rook has previously moved ...

in Rollerball. * A rook moves any number of steps orthogonally in a straight line in a forward direction, or any number of steps orthogonally sideways. It can also move one step orthogonally backward on its ring. When moving along the outer ring, the rook may "rebound" off a corner square and continue its forward journey at 90 degrees. (Corner squares have 45 degree edges for rebounding.) Only one rebound is permitted for a given rook move. * The bishop moves any number of steps diagonally forward, or one step diagonally backward. The bishop may rebound off an outer or inner board edge and continue its forward diagonal journey at 90 degrees. Only one rebound is permitted for a given bishop move. * A pawn moves and captures one step orthogonally forward on the ring on which it currently stands, or one step diagonally forward to either ring. A pawn does not move backward or sideways, and there is no initial two-step option. A pawn promotes to rook or bishop when reaching either of the two starting squares of the opponent's pawns.

References

Bibliography *

External links

*
Rollerball
by Jean-Louis Cazaux, ''

The Chess Variant Pages ''The Chess Variant Pages'' is a non-commercial website devoted to chess variants. It was created by Hans Bodlaender in 1995. The site is "run by hobbyists for hobbyists" and is "the most wide-ranging and authoritative web site on chess variants". ...

'' {{Chess variants, state=collapsed Chess variants 1998 in chess Board games introduced in 1998