Chess Variant Pages is an amateur, volunteer-run website founded in 1995 and dedicated to documenting and sharing games based on, related to, or similar to chess. It describes itself as the world’s largest collection of these games, bringing together historical, regional, modern, and experimental variants, including games played on different boards, with altered pieces or movement rules, and with distinctive ways to capture or win. Visitors can explore rules through searchable databases, indexes, topic pages, tags, and curated selections, or play online using Game Courier, computer programs, Java applets, and interactive tools.

The site also supports people who want to create and share their own games, offering design guidance, a chess-variant construction set, diagram tools, and resources for notation and play-testing. Additional content includes articles about pieces, publications, the history and terminology of chess variants, and links to related communities and external resources. Chess Variant Pages is sustained by advertising and donations, with affiliate links to retailers offering chess equipment, books, board games, and variant sets