Chess Variants Pages
Comprehensive site with rules, information, histories, and links for a large number of chess variants.
Chess History Center
Service center for serious chess historians, clearinghouse of research requests and index to web resources.
Devoted to the history of California Chess, 12,667 chess games suitable for downloading into ChessBase, a large collection of articles and photographs, Shorman's thirty rules, and much more.
On the Origins of Chess
Collection of essays on the origins and history of this ancient game.
ChessEbook - Chess History
Features games of World Chess Championships as well as biographies of World Champions.
Culture et Curiosites de l'Echiquier
Historical and philosophical approaches of Chess with over 40 articles and original studies.