BRITISH CHESS PROBLEM SOCIETY
Organisations and Groups
Individual British Problemists
Books and E-Books
General chess sites featuring chess compositions
Chess and Computing
Miscellaneous chess sites
Links to chess problem reference sites.
132 Problems and Studies by J. T. Sanderse
Also compositions by Sam Loyd and Mark Liburkin.
Cleveland Public Library (Ohio, USA)
The home of the J. G. White chess collection.
Harald E. Ballo
Chess Bibliography (in German).
The National Library of the Netherlands (in The Hague) which houses the famous Bibliotheca Van de Linde-Niemeijeriana, a large chess and draughts collection.
The Massmann Collection.
at the Schleswig Holstein Library (in German).
The Meson Chess Problem Database.
A free, online database of over 156,000 chess problems, mostly mates in fewer than six moves.
The Problem Database Server (PDB).
A chess problem data base of mainly helpmates and retros.
Chess Books (in German).
Developed and maintained by Brian Stephenson.