You are on the backup site for Any posts, moves, or other changes you make here will not be permanent, because the pages and database from the main site will be backed up here every midnight EST. Additionally, things may not be working right, because this site is also a testbed for newer system software. So, if you are not here to test, develop, or merely read this site, you may want to change .org to .com in the navigation bar and go to the main site.

The Chess Variant Pages

Exclusive chess

One of the themes that are used in unorthodox or fairy chess problems is Exclusive chess. For normal play, exclusive chess probably differs too little from normal chess to make it interesting.


All rules of orthodox chess are followed in addition to the following rule.

White and black may only give mate when there is only one possible mating move. When there are two or more moves that give mate for the player, it is illegal to play one of these moves.

Example problem

Theodor Steudel, Germany
Dedicated to Hans Burbach
Probleemblad, March/April 2000



White to mate in two moves, Exclusive Chess.


Written by Hans Bodlaender.
WWW page created: August 19, 2000. Last modified: August 19, 2000.