Rules for Dimensionalized Chess
- Rules for a three dimensioal version of the game. Includes photos of a three dimensional chess board.
- http://www.dimensionalized.com/game/rules4_3d_chess/index.php

Guardian Unlimited Sport - Introducing the World's Most Unlikely Sport: Chessboxing
- Describes the origin of the sport.
- http://sport.guardian.co.uk/news/story/0,10488,1600441,00.html

World Chess Boxing Organization
- Presents event schedules and news.
- http://www.wcbo.org/

Spacechess
- Contains spacechess rules, softwares, information about spacechess variants.
- http://www.free-hp.com/spacechess3d

Charlatan Chess
- Describes an alternate version. Outlines new rules, a new gamepiece, and a new board.
- http://www.charlatanchess.com/

Chance Chess
- Playing card based game. Offers cards for sale or an online version.
- http://chancechess.com/

Witch's Chess
- Played on a hexagon-shaped board with new figures with two or three players. Describes figures, movements, and rules.
- http://www.hexenspiel.de/