Adaptive Tactics Server
- Interactive site, features chess puzzles adapted to the strength of the user and other chess drills.
- http://www.snufflenose.com/ats/index.php

British Chess Problem Society
- Oldest chess problem society in the world, contains articles about chess problem solving, chess problem composition and home of the publication "The Problemist"
- http://www.bcps.knightsfield.co.uk/

The BDS Website
- Offers information about the British Chess Problem Society and the British Chess Solving Championship.
- http://www.bstephen.me.uk/

Chess Tempo
- Interactive site, contains over 11,000 chess problems, puzzles and members rated by Glicko rating system.
- http://chesstempo.com/

ChessProblems
- Interactive site, members can contribute and solve problems [Requires Java].
- http://www.chessproblems.com/

The Retrograde Analysis Corner
- About retrogade analysis in chess which is a special category of chess problems.
- http://janko.at/Retros/index.htm

The Gorfo Pages
- Problem archive composed by Göran Forslund.
- http://web.telia.com/~u13101113/Chess/Problem/

Vincent's Chess Problems
- Features chess problems in graphical format and includes a list of books which contains chess problems.
- http://www.blub.net/~vincent/list.html

Udo Mark's Chess Problems
- Includes Janus Chess, Chinese Chess (Xiangqi) and Japanese Chess (Shogi) problems.
- http://www.chess-problem.com/

Bruno's Chess Problem of the Day
- Interactive Site, solutions are given the next day, includes archive of all past problems [Interactive board requires Java].
- http://chessproblem.my-free-games.com/

DHS Chess Problems
- Eight problems with ideas such as Selfmate and Helpmate implemented. A description of notation is included.
- http://www.daveslater.telinco.co.uk/chess.htm

Tim Krabbé's Chess Curiosities
- Chess problems with narrative about how each came about and what really happened after the position. For advanced players.
- http://www.xs4all.nl/~timkr/chess/chess.html

132 Studies and Problems
- Collection of problems in GIF format from newspapers and magazines.
- http://www.xs4all.nl/~dsu/

Jon Levitt's Chess Pages
- Problems, talent tests, and selected games by British Grandmaster Jon Levitt.
- http://www.jlevitt.dircon.co.uk/

Adam's Chess Puzzles
- Problems for beginner, intermediate, and advanced players, in GIF format.
- http://homepage.ntlworld.com/adam.bozon/ChessPuzzles.htm

Patrick Corn's Chess Problems
- Sixteen various chess problems and solutions, with text descriptions of the positions.
- http://math.berkeley.edu/~corn/chess.html

Mat Plus
- Graphical Chess problems published by the Yugoslav Chess Problemists Society.
- http://www.matplus.org.yu/

Classic Chess Problems
- Two and three move problems by noted problem composers.
- http://thinks.com/chess/