Starts with the letter 'U'
- U-Chess. Play Unambiguous Three-Symbol Chess online. Author: Fergus Duniho.
- Ultima. Game where each type of piece has a different capturing ability. (Recognized!) Author: Antoine Fourrière and Fergus Duniho. Inventor: Robert Abbott.
- Undecided Chess. Undecided Pawns change into orthodox pieces by moving like them. By Adrian Alvarez de la Campa.
- Unicorn Chess. Unicorn Chess with one queen, two cardinalriders and two marshalls. Author: Jeremy Gabriel Good. Inventor: David Paulowich.
- Unicorn Great Chess. Enjoyable game: Great Chess pawn structure encloses two half-ducks - "lions" - with exciting bishop-nightrider - "unicorn.". Author: Fergus Duniho. Inventor: David Paulowich.
- Univers Chess. Play this Carrera's Chess variant with no unprotected Pawns on Game Courier. By Fergus Duniho.
- Universal Chess. http://www.chessvariants.org/index/msdisplay.php?itemid=MSuniversalchess. By Carlos Cetina.
|7 'Play by mail item' entries listed||1 'Large board' entry listed|
|1 'In a category all its own' entry listed|
Total items listed: 7