Welcome to the MESON Chess Problem Database (currently holding 157,164 problems)

MESON is a database of composed chess problems. You will not find any game positions here! In MESON there are mostly directmates in 2, 3, 4 and 5 moves. Problems of greater length and/or with other stipulations are also present but I am not currently adding such.

On this website you will be able to search for problems using different criteria, including composer, year(s) published, king positions, material balance, source, quoter, stipulation and aspects of the diagram position. You will also be able to search by PID. Lists of anticipations are available as are lists of the books and magazines from which I have abstracted the problems in MESON. There are also various statistics about the database.

You can find out more about MESON by selecting the About Mesonitem in the menu on the left.

Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).