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- 4x16 Race Chess Revisited. New version of race chess on circular 4 by 16 board. (16x4, Cells: 64) By Ralph Betza.
- ABC Chess. A variant with 8 armies of pieces generated by combining 1, 2 or 3 simpler pieces. (8x8, Cells: 64) By Jeff `Cavebear` Stroud.
- ABC Chess. A variant with 8 armies of pieces generated by combining 1, 2 or 3 simpler pieces. By Jeff `Cavebear` Stroud.
- Abstract Chess. Pieces are represented by stacks of different heights. Author: Ed Friedlander. Inventor: João Pedro Neto.
- Abstract Chess . Pieces are really by stacks of stones of different heights, with their move depending on the number of stones. Author: Peter Aronson. Inventor: João Pedro Neto.
- Abstract Chess. Pieces are represented by stacks of different heights. By João Pedro Neto.
- Across the Board : The Mathematics of Chessboard Problems. Short information on book of J. Watkins, with puzzles about the chessboard.
- Advancement Chess. kevintucker88. By Freederick .
- Afterlife Chess. A game based on Ancient Egyption mythology, played on four boards totaling 42 squares. (Cells: 42) By Luiz Carlos Campos.
- AIGO Chess. International chess with Cannon pieces added. (8x8, Cells: 64) Author: David Howe. Inventor: Feng Jun.
- Alice Chess . Classic Variant where pieces switch between two boards whenever they move. Author: Pierre Tourigny. Inventor: Vernon Rylands Parton.
- Alice Chess. Play this classic variant in which pieces switch between boards whenever they move. (Recognized!) Author: Fergus Duniho. Inventor: Vernon Rylands Parton.
- Alice Chess. Classic Variant where pieces switch between two boards whenever they move. (2x(8x8), Cells: 128) (Recognized!) Author: Edward Jackman and Fergus Duniho. Inventor: Vernon Rylands Parton.
- Alice Chess. Looking-glass boards. Extremely popular variant. Author: Ed Friedlander. Inventor: Vernon Rylands Parton.
- Alice Chess . New Alice Chess ZRF plays Alice Chess on two boards. Author: Fergus Duniho. Inventor: Vernon Rylands Parton.
- Alice Chess II. Alice Chess with armies starting on opposite boards. Author: Ed Friedlander. Inventor: Vernon Rylands Parton.
- All the King's Men. Remake of Parker Brothers game Smess, but with a serious look. Arrows on squares determine the directions pieces can move. (7x8, Cells: 56) (Recognized!) Author: Fergus Duniho and David Howe. Inventor: Perry Grant and Reuben Klamer.
- Alseid Chess. Introducing the Alseid, which moves like a queen but cannot capture. Instead it can kidnap piece behind a screen (zrf exists). By M Winther.
- Altair. Altair is a modern game with an oriental flavor. By Roberto Lavieri.
- Altair. Altair is a modern game with an oriental flavor. (9x9, Cells: 81) By Roberto Lavieri.
- Altair . Take a look at this sample game of Altair! Author: Roberto Lavieri and Jorge Guerra. Inventor: Roberto Lavieri.
- Alternate Promotion Chess. Pieces promoted at one end of the board are promoted further at the other. (8x8, Cells: 64) By Charles Gilman.
- Amazon Knights Chess. The queen may also move as a knight, and rooks and bishops. Author: Ed Friedlander.
- Amazons. Queens fire arrows to make squares unpassable. Last player that moves wins. (10x10, Cells: 100) Author: Ed Pegg Jr.. Inventor: Walter Zamkauskas.
- Amazons. Amazons and a computer version. Inventor: Walter Zamkauskas.
- Amiral Chess. Introducing the Amiral piece and the bounce-capture method on a Gustavian board (zrf available). By M Winther.
- Andromi. Game with simple rules. Inventor: Ronald D. Planesi.
- Archabbott Chess. Introduces the Archabbott piece which moves like Bishop + Wazir + Dabbaba. Author: Jeremy Gabriel Good. Inventor: Eric V. Greenwood.
- Arena Chess. 32-turn variant in which pieces must initially move into a special area, and then always make capturing moves. By Jeff Kiska.
- Arena Chess. Entry in the 32-move-maximum contest. Author: Ed Friedlander. Inventor: Jeff Kiska.
- Arktur. Two kings and randomized setup. (8x8, Cells: 64) By Peter Riessen.
- Assault&Siege. Missing description (8x8, Cells: 64) By Ismael Santos.
- Assimilation Chess . Increase your material by assimilating your opponent's pieces. By Fergus Duniho.
- Assimilation Fusion Chess . A hybrid of Assimilation Chess and Fusion Chess. Pieces combine and split apart. By Fergus Duniho.
- Assimilation Fusion Chess. A hybrid of Assimilation Chess and Fusion Chess. Pieces combine and split apart. (8x8, Cells: 64) By Fergus Duniho.
- Attending Pawns. Pieces have their personal pawn assistent. By Terry H. Jones.
- Attrition Chess. Played on an 11x10 board, each player starts with 33 pieces. (11x10, Cells: 110) By Nathan James.
- Avatar Chess. Game with avatars that can assume any piece of chess, depending on the fields of the board. (8x8, Cells: 64) By Gerd P. Degens.
- Bandit Chess. Missing description (9x7, Cells: 63) By Patrik Hedman.
- Barion. A variant of the chess variant Bario. By M Winther.
- Barion. A variant of the chess variant Bario. By M Winther.
- Baroque Chess. Java applet that plays the game. Author: Jesse Plymale. Inventor: Robert Abbott.
- Baroque/Ultima. Game where each type of piece has a different capturing ability. (8x8, Cells: 64) (Recognized!) Author: Hans L. Bodlaender and Fergus Duniho. Inventor: Robert Abbott.
- Bedlam . A hybrid of Metamorphin' Fusion Chess and Chessgi. By Fergus Duniho.
- Belfry Chess. Introducing the belfry catapult. By M Winther.
- Bifold Halfgi. Bifold pieces are able to combine with other same-colored bifold pieces and move as a single normal sized piece. By David Howe.
- Bifold Halfgi. A variant of Halfgi, but with half-sized pieces. By David Howe.
- Blackburne's Proposal. QR becomes a marshall, QB becomes a pegasus, and KB becomes a queen are enhanced. Author: Ed Friedlander. Inventor: S. S. Blackburn.
- Bollwerk 178. Occupying the opponent’s end field with a piece or a bomb. By Stefan Bogdanski.
- Bomberman Chess. Two "bombs" and a "defuser" spice up this 10 x 8 game. Author: Jeremy Gabriel Good.
- BordahBee, A Two-Board Game (two 8x8 boards). Missing description (2x(8x8), Cells: 128) By Gary K. Gifford.
- Border Wars . Game played on the 42 edges of a grid, with elements of Shogi and XiangQi. Author: Peter Aronson. Inventor: Jared B. McComb.
- Border Wars. Game played on the 42 edges of a grid, with elements of Shogi and XiangQi. (Cells: 42) By Jared B. McComb.
- Border Wars II . Game played on line edges with Shogi-like aspects. Author: Peter Aronson. Inventor: Jared B. McComb.
- Border Wars II. Game played on line edges with Shogi-like aspects. (Cells: 44) By Jared B. McComb.
- Borderline. Without pawns, with only one king, capturing opponent's pieces is omitted. (7x7, Cells: 49) By Gerd P. Degens.
- Brigadier Chess. Introducing the powerful Brigadier piece on a 68-square Gustavian board. By M Winther.
- Building chess. Add a square after every move. Author: Abdul-Rahman Sibahi. Inventor: Abdul-Rahman Sibahi and Sergey Sirotkin.
- Burden of royality. Missing description By Freederick .
- Burden of the royality. Inspired by Evolution Chess. (8x8, Cells: 64) By Daniil Frolov.
- Buypoint Chess. Buy your fighting force - each piece costs a number of points. By Ralph Betza.
- Cai Qi. Chesslike game on circular board. Inventor: Patrick Hassel Zein.
- Canopus . Most pieces movements are range-limited. The game play is violent and tense, but fluid. By Roberto Lavieri.
- Canopus. Most pieces movements are range-limited. The game play is violent and tense, but fluid. (9x8, Cells: 72) By Roberto Lavieri.
- Captain Spalding Chess. Find an Elephant in your Pajamas. By Ralph Betza.
- Captain Spalding Chess . Find an Elephant in your Pajamas. Author: Peter Aronson. Inventor: Ralph Betza.
- Castalia Chess. Introducing the Castalia, which moves like a queen but cannot capture. Instead it can magnetically dislocate pieces (zrf exists). By M Winther.
- Catalonia. Cooperative variant where the players are trying to form chains while the board is getting bombarded. (8x8, Cells: 64) By Francois Tremblay.
- Cetina Random Chess. Missing description By Carlos Cetina.
- Cetina Random Chess. Play with a sissa and a chancellor from a randomly generated setup. By Carlos Cetina.
- Cetran Chess 2. Missing description (8x8, Cells: 64) By Carlos Cetina.
- Chad. Castles and walls in a strategic deep chess variant. (12x12, Cells: 144) By Christian Freeling.
- Chad. Christian Freeling's simple game of complex strategy. Author: Ed Friedlander. Inventor: Christian Freeling.
- Chain of Fools. Game with a Chess set where the goal is form chains of defended pieces. (8x8, Cells: 64) By Francois Tremblay.
- Chakra. Variant with fairy pieces and transmitters that can transport pieces. (8x8, Cells: 64) By Christian Freeling.
- Chakra . Variant with fairy pieces and transmitters that can transport pieces. Author: Robert Price. Inventor: Christian Freeling.
- Chameleon Chess Redux. Missing description (8x8, Cells: 64) By Adam Goss.
- chass. www.chass.info. By peter kirk.
- Chec Toe. Chec Toe is a 4x4 Chess variant played with a six sided die, incorporating uniquely designed features, such as Checkering, Cross. By Simon Edward Jepps.
- Checkers with Bosses. Checkers variant with different types of pieces. Game's main feature are Bosses. (8x8, Cells: 64) By Daniil Frolov.
- Cheer Chess. All pieces are boosted by sideline Cheerers. By Ken Franklin.
- Cheshire Cat Chess. When a unit leaves a square, the square vanishes. Author: Ed Friedlander. Inventor: Vernon Rylands Parton.
- Chess on a Longer Board with a few Pieces Added. On a 10 row by 8 column board, with three new pieces. (8x10, Cells: 80) By David Howe.
- Chess on a Longer Board with a few Pieces Added . On a 10 row by 8 column board, with three new pieces. By David Howe.
- Chess on a Longer Board Zillions Saved Game . Download this file to see this game played in the Multivariant Play by E-Mail Tournament. Author: Michael Nelson and John Lawson. Inventor: David Howe.
- Chess on a Mass Transit System. Missing description By Doug Chatham.
- Chess Variant Score Notation Book. Chess score notation book for 100 square chess variants. By Simon Edward Jepps.
- Chess with checkers added. Add checkers in front of the pawns. (8x8, Cells: 64) By (zzo38) A. Black.
- Chess with Cyclical Armies . Whenever a piece moves, it changes to another type of piece of vaguely similar value. By Peter Aronson.
- Chess with Cyclical Armies. Whenever a piece moves, it changes to another type of piece of vaguely similar value. By Peter Aronson.
- Chess with Promoters. Missing description (8x8, Cells: 64) By Roberto Lavieri.
- A Chess-like Variant Construction Set. Build your own army and territory. By David Howe.
- Chess-like Variant Construction Set. Critique. Author: John William Brown. Inventor: David Howe.
- CHESSAGON. CHESSAGON® is like traditional Chess, but with Triangles, with one new additional piece named the Duke. By Kerry Langford.
- ChessArena.io. Real-time, many-player, "io-style" game. Author: Ben M Reiniger. Inventor: ChessArena.
- Chessenat. Game from Columbia with custodial captures. Author: Ed Friedlander.
- Chessgi . Captured units become yours to drop onto the board. Author: Fergus Duniho.
- Chessgi. Captured units become yours to drop onto the board. Author: Ed Friedlander.
- Chessgi. Drop the pieces you take from your opponent. (8x8, Cells: 64) Author: Hans L. Bodlaender.
- Chessoids: SuperPawn and NeutronChess. A large and complicated chess variant. (11x10, Cells: 111) By Eugen Laukamp.
- Chestria. Each player has 11 randomly selected pieces in this game of placement and flipping. (3x(5x5), Cells: 43) By Jared B. McComb.
- Chieftain Chess. Large variant using 4 royal pieces with command control, multi-piece moves and pieces that may shift direction as they move. Author: Jeremy Gabriel Good. Inventor: Joe Joyce.
- Choiss. First place your squares, then your pawns, then your pieces, then move. Author: Ben M Reiniger. Inventor: Peter A. Victor.
- Clear of knights chess. Missing description (8x8, Cells: 64) By Patrik Hedman.
- Clockwork Orange Chess. Captured pieces are replaced with non-capturing counterparts. Author: Ed Friedlander. Inventor: Fergus Duniho.
- Clockwork Orange Chess. Captured pieces are replaced with non-capturing counterparts. (8x8, Cells: 64) By Fergus Duniho.
- Clockwork Orange Chess . Captured pieces are replaced with non-capturing counterparts. By Fergus Duniho.
- Colour Chess and Lure. Chess Variant where the board is different every time you play, and you can control what pieces your opponent can move next. By Chad W Smith.
- Commodore Chess. Featuring the Commodore piece (also called Leo) on a Gustavian board. By M Winther.
- Connect Shoot Kill. A mix of dots and boxes with chess pieces.
- Constable Chess. Introducing the Constable piece on an H-shaped board. A game for attacking players. With zrf. By M Winther.
- Contest to design a 10-chess variant. Cebrating 10 years of Chess Variant Pages with a contest to design a chess variant. Author: Hans L. Bodlaender and Greg Strong.
- Continuous Chess. There are no 'squares' on the board, and pieces are not restricted to moving discrete distances. By David Howe.
- Copycat Chess. New piece added which copies move of just-moved piece. (8x8, Cells: 64) By Lim Ther Peng.
- Corner Chess. Fast-paced variant without pawns. Author: Ed Friedlander. Inventor: Derek Nalls.
- Cowardly Crew. After a capture, adjacent pieces can change sides. (8x8, Cells: 64) By Terry H. Jones.
- Cows and Butterflies. A simple Chess-like game of exchanges and promotions. Author: Peter Aronson. Inventor: Jennifer Aronson.
- Crazyhouse. A two-player version of Bughouse. (8x8, Cells: 64) (Recognized!) Author: Fergus Duniho.
- Crazyhouse . A two-player version of Bughouse. (Recognized!) Author: Fergus Duniho.
- Crazyhouse Chess. One-board Bughouse. Author: Ed Friedlander.
- Crazyhouse Kriegspiel. Combines Crazyhouse with Kriegspiel. (8x8, Cells: 64) By David Dana-Bashian.
- CrazyWar. CrazyWar is normal Crazyhouse with extra pieces. By Christine Bagley-Jones.
- Crooked Chess. Chess variant with pieces inspired by the Sissa piece. By Jeremy Gabriel Good.
- Crossbishop Chess. Introducing the Crossbishop piece, with interesting cannon capabilities (Zillions file downloadable). By M Winther.
- Crossrook Chess. Introducing the Crossrook, a versatile piece with cannon capabilities (Zillions file downloadable). By M Winther.
- The Crown of Krithala. Pieces move a crown which the opponent wants to capture. By Lawrence C. Smith.
- CSIPGS (comp.sys.ibm.pc.games.strategic) Chess Variants. Variants on csipgs Chess and a handy overview of its rules. By Hans L. Bodlaender.
- Cuarenta. Played only of the light-colored squares of a 9 by 9 board. By Mark Thompson.
- Cuarenta . Played only of the light-colored squares of a 9 by 9 board. By Mark Thompson.
- Cypher Chess. Game with novel piece. By Daniel Figahs.
- DCP.WOZ Chess. Large variant with unorthodox pieces. (9x10, Cells: 90)
- Demi Chess. Weak short range pieces with less symmetry than some more familliar pieces. Author: Jeremy Gabriel Good. Inventor: Ralph Betza.
- Demotion Chessgi . Chessgi variant limited to 32 turns by demotions and the removal of Pawns. By Fergus Duniho.
- Demotion Chessgi. a Chessgi variant which is limited to 32 turns by demotions and the removal of Pawns. By Fergus Duniho.
- Deneb . Special pieces and winning conditions. By Roberto Lavieri.
- Deneb. Now you can play Deneb on the Play-By-Mail system! Author: Roberto Lavieri and Tony Quintanilla. Inventor: Roberto Lavieri.
- Deneb. Special pieces and winning conditions. (7x9, Cells: 63) By Roberto Lavieri.
- Deneb Play-By-Mail game. Observe this game being played in the Invent and Play contest! Turn 4. Author: Roberto Lavieri and Tony Quintanilla. Inventor: Roberto Lavieri.
- Diamond Chess 306. Missing description (22x24, Cells: 306) By David Cannon.
- Diffusion Chess. Pieces start out in groups and must continually break apart into smaller groups. Played on a GO board. (19x19, Cells: 361) By Alexandre Muñiz.
- Dimachaer Chess. Introducing the Dimachaer, a bifurcation piece that always lands on the diagonal second leg (zrf available). By M Winther.
- Dino-Czars. Battle between rival dinosaurs on a board of 42 triangles, where facing counts. (Cells: 42) By Clark Rodeffer.
- Dino-Czars . Battle between rival dinosaurs on a board of 42 triangles, where facing counts. By Clark Rodeffer.
- Diplomatic Mission. Cooperative chesslike game; commercial game. Inventor: Jim Deacove.
- Double Diamond. Pieces start diagonally across from one another and pawns move diagonally. Author: Jeremy Gabriel Good. Inventor: Jim Aikin.
- Double EIGHTEEN-STONE chess. David Short combines his Double Chess with Jim Aikin's Eight-Stone Chess. Author: Jeremy Gabriel Good. Inventor: David Short.
- Doublecannon Chess. Introducing the Doublecannon piece, a strong cannon relative with breathtaking tactical capabilities (Zillions file exists). By M Winther.
- Dr. Who Chess. Variant based on the popular TV seiries. By Calvin Jack Pomerantz.
- DUAL RING Tournament Format. Tournament format for handling uneven number of players. By Rich Hutnik.
- Dune Chess. Chess variant based on the Dune novels of Frank Herbert. By Larry L. Smith.
- Ecumenical Chess. Ecumenical Chess features three variants with camel-bishop, camel-rook knight-camel compounds. Author: Jeremy Gabriel Good. Inventor: Charles Gilman.
- Eight-Stone Chess. Players can move neutral stones as well as pieces. Author: Jeremy Gabriel Good. Inventor: Jim Aikin.
- Elephant Hunt . Ituri Forest Pygmi traditional game with chess-like elements. By Freederick .
- Elephant Hunt. Ituri Forest Pygmi traditional game with chess-like elements. Author: Tony Quintanilla. Inventor: Freederick .
- Elephant Hunt. Ituri Forest Pygmi traditional game with chess-like elements. (10x10, Cells: 100) By Freederick .
- Elevator Chess. Multiple boards with simultaneous games are linked through central elevator squares. By Ralph Betza.
- Emperor of China. A Chess and Halma mixed game. By Vincent Everaert.
- Emperor of China. A cross between Chess and Halma. Author: Ed Friedlander. Inventor: Vincent Everaert.
- Endgame. Players start out with 16 pawns and gain pieces via promotion. (8x8, Cells: 64) By Jorge Nuno Silva.
- Enthralling Chess. A 32-turn variant in which pieces are 'enthralled', and then 'liberated' (ie. removed from the board). By Jeff Kiska.
- Epic Chess. Massive attack chess on a board 10x10. By Вадря Покштя.
- ERB Jetan . Implements different possible rules for Jetan. Author: Larry L. Smith. Inventor: Edgar Rice Burroughs.
- Essedar Chess. Introducing the Essedar, which captures orthogonally but moves by the collision method (zrf available). By M Winther.
- Eurasian Pawn piece. A hybrid European and Asian Pawn. By Rich Hutnik.
- Evo. Game with chess-variant elements. Inventor: Giardino Italiano.
- Exchess Set. New chess pieces that can be used in combination with Staunton chess pieces. Author: Hans L. Bodlaender. Inventor: Henk van Haeringen.
- Execute the Game. Pieces have unique abilities and uses dice-based combat. By Davey W Drehs.
- Expansion chess. Get points per each your piece on other half of board to win. (8x8, Cells: 64) By Lev Grigoriev.
- Extreme 2D Chess. Missing description (10x10, Cells: 100) By Larry L. Smith.
- Famicom PPU Chess. Game inspired by limitation of Famicom PPU. (10x10, Cells: 80) By (zzo38) A. Black.
- Family pastimes: Maze and Diplomatic Mission. Cooperative chesslike games. Inventor: Jim Deacove.
- Fanorona Chess. Variant played on a Fanorona board with capture by approach and by withdrawal. (5x9, Cells: 45) By Peter Aronson.
- Fanorona Chess . Variant played on a Fanorona board with capture by approach and by withdrawal. By Peter Aronson.
- FCC. Free Choice Chess -- Large variant where players choose and deploy their own forces. By Bruce R. Gilson.
- Fidchell. Gary Gygax's Fidchell. Author: Larry L. Smith. Inventor: Gary Gygax.
- Finding ways to spin your games. After having moved, pieces change type in rotating order. By João Pedro Neto.
- FlipChess. Chess variant in which pieces keep changing state. By M. El M. Messaoudi.
- Fluidity chess. No displacement capture, all non-royal pieces take by cutting through or bypassing. (8x8, Cells: 64) By Lev Grigoriev.
- Fluky Chess. Fast-paced mini-chess variant with dice. (5x5, Cells: 25) By Ilya Yudovski.
- Flying Armies . Missing description By Christine Bagley-Jones.
- Font: Draughts . True type font with symbols for draughts/checkers pieces. Author: Hans L. Bodlaender.
- Football Chess - Photo's. Chinese game of Snakes and Ladders type, with little in common with either Chess or Football. Author: Hans L. Bodlaender.
- Fractal Chess. Missing description (2x(8x8), Cells: 80) By Stephane Burkhart.
- Free Choice Chess. Large variant where players choose and deploy their own forces. By Bruce R. Gilson.
- Fugue . Based on Ultima and Rococo this game has pieces that capture in unusual ways. By Michael Nelson.
- Fugue. Based on Ultima and Rococo this game has pieces that capture in unusual ways. (8x8, Cells: 64) By Michael Nelson.
- Full House. Missing description (8x8, Cells: 64) By Topher Gayle.
- Fun-In-A-Box Chess . Featuring Thing One and Thing Two from The Cat in the Hat. Author: Peter Aronson. Inventor: David Howe.
- Fun-in-a-Box Chess. Featuring Thing One and Thing Two from The Cat in the Hat. By David Howe.
- Fusion Chess . Variant in which pieces may merge together or split apart. By Fergus Duniho.
- Fusion Chess A. Pieces merge and separate. Author: Ed Friedlander. Inventor: Fergus Duniho.
- Fusion Chess B. Pieces merge and separate. Author: Ed Friedlander. Inventor: Fergus Duniho.
- Fusion Chessgi. A hybrid of Fusion Chess and Chessgi. By Fergus Duniho.
- Fusion Chessgi . A hybrid of Fusion Chess and Chessgi. By Fergus Duniho.
- Fusion Diamond 41. A Fusion Chess variant played on a diamond shaped board of 41 squares. (Cells: 41) By Fergus Duniho.
- Fusion Diamond 41 . A Fusion Chess variant played on a diamond shaped board of 41 squares. By Fergus Duniho.
- Fusion Diamond 41. A Fusion Chess variant played on a diamond shaped board of 41 squares. By Fergus Duniho.
- G.U.E. 3D Chess. A 3D Chess game paying homage to those really great Zork adventures. By Larry L. Smith.
- Gadsden's Toroidal Chess . Edges of the board are considered to be adjacent. Author: Marek14 . Inventor: Richard Gadsden.
- Gambler's Chess. A scheme for adding betting to any Chess variant. By Tomas Forsman.
- The Game for the Trees. Pieces grow on the board, occupying multiple squares. (8x8, Cells: 64) By Ralph Betza.
- The Game of Nemoroth. For the sake of your sanity, do not read this variant! (8x8, Cells: 64) By Ralph Betza.
- Ganeshan Chess. Introducing a new Elephant piece known as (the) Ganapati. (10x10, Cells: 100) By Simon Edward Jepps.
- Gaul Chess. Introducing the Gaul, which captures like a bishop, but moves by the bifurcated jump method, on an H-board (zrf available). By M Winther.
- Genetess. A play-by-email game with genetically encoded pieces. By Robert Kydd.
- Geodesic Chess. Variation of hexagonal chess on a geodesic sphere with a few new pieces added. By Jack V. Cheiky.
- Geodesic Chess. Variation of hexagonal chess on a geodesic sphere with a few new pieces added. (Cells: 279) By Jack V. Cheiky.
- Glacial Shift. 4-player game played with Icehouse pieces with Shogi-style captures and where the same piece moves differently for each player. (10x10, Cells: 100) By Jared B. McComb.
- Go. Play Go with Game Courier. Author: Fergus Duniho.
- Granlem Shatranj. This is a mash-up of Grand Shatranj & Lemurian Shatranj with a 3 moves/player turn option. By Joe Joyce.
- Grasshopper Chess. Each player has eight additional grasshoppers. Author: Antoine Fourrière. Inventor: Joseph Boyer.
- Grasshopper Chess. Each player has eight additional grasshoppers. Author: Hans L. Bodlaender. Inventor: Joseph Boyer.
- Grasshopper Chess. Row of grasshoppers behind the pawns. Author: Ed Friedlander. Inventor: Joseph Boyer.
- Grenadier Chess. Introducing the Grenadier piece on an H-shaped board. A game for the attacking player. With zrf. By M Winther.
- Gryphon Chess. Units are promoted on each move. Author: Ed Friedlander. Inventor: Vernon Rylands Parton.
- Gryphon Chess II. Units are promoted on each move. Author: Ed Friedlander.
- Gustav III's Chess. Invented by King Gustav III of Sweden (1746-92). Author: M Winther. Inventor: King Gustav III of Sweden.
- Gustavian Camelrider Chess. Camelriders and regular pieces on a Gustavian (68squares) board. By M Winther.
- Gustavian Cannonrider Chess. Cannonriders and regular pieces on a Gustavian (68 squares) board. Cannonriders move differently depending on square colour. By M Winther.
- Gustavian-Camelrider Chess (with Scorpions). Camelriders and Scorpions on a 68 square Gustavian board. By M Winther.
- Half Courier. Missing description Author: Nick Wolff. Inventor: Charles Gilman.
- Hanga Roa . Play Hanga Roa with Zillions of Games! Author: Young-Hyun Joo. Inventor: Juan Pablo Schweitzer Kirsinger and Hernán Marcelo Domínguez Placencia.
- Hanga Roa. Play Hanga Roa on Game Courier! Author: Tony Quintanilla and Juan Pablo Schweitzer Kirsinger. Inventor: Juan Pablo Schweitzer Kirsinger and Hernán Marcelo Domínguez Placencia.
- Hanga Roa. A chess variant inspired by the people of Easter Island. (9x9, Cells: 81) By Hernán Marcelo Domínguez Placencia and Juan Pablo Schweitzer Kirsinger.
- Haunted Chess. Missing description (8x8, Cells: 64) By Stephane Burkhart.
- Hecatomb. Each player has 31 queens and one king. (8x8, Cells: 64) Author: Hans L. Bodlaender. Inventor: Kevin Maroney.
- Hecatomb Chess. One king and 31 queens on each side. Author: Ed Friedlander. Inventor: Kevin Maroney.
- Helmsman Chess. Introducing the Helmsman and the bounce-move, whereby the piece deviates orthogonally. A very positional piece (zrf available). By M Winther.
- Hibryd I. Game played on 4x4 board with a King and four Pawns each, neutral pieces, multiple forms of capture and many ways of winning. (4x4, Cells: 16) By Jared B. McComb.
- Hit-point Chess. Pieces start with 30 hit points and attack by stepping next to the target. (8x8, Cells: 64) By (zzo38) A. Black.
- Hive: A Review. A review of the two-player strategy game called Hive. Author: David Howe.
- Hnefatafl - the Strategic Board Game of the Vikings . Detailed rules and history of a Chess-like game played for 100's of years in Northern Europe. Author: Sten Helmfrid.
- Homo Scacco. Several games with pieces of same type and a royal amongst them. (8x8, Cells: 64) By Lev Grigoriev.
- Hopgi . Small-board variant of Chessgi with an L-shaped board, linked pairs of Kings, where all pieces can move like a Mao-hoppers. By Peter Aronson.
- Hopgi. Small-board variant of Chessgi with an L-shaped board, linked pairs of Kings, where all pieces can move like a Mao-hoppers. (7x7, Cells: 43) By Peter Aronson.
- Hoplit Chess. Introducing the Hoplit, a very mobile modern relative of the Korean cannon, on an H-board (zrf available). By M Winther.
- Hoplomach Chess. Introducing the Hoplomach, a dynamic bifurcation cannon, related to the Korean cannon, on an H-board (zrf available). By M Winther.
- Hordes of Change . A chess variant inspired by Andernach Chess. By Joost aan de Brugh.
- Hordes of Change. A chess variant inspired by Andernach Chess. (8x8, Cells: 64) By Joost aan de Brugh.
- Hordes of Change - Sample Game. Missing description By Joost aan de Brugh.
- Howitzer Chess. Introducing another piece named Howitzer, a fearful form of cannon, on the H-board. For the advanced tactician. With zrf. By M Winther.
- Hubbub. Preset for Hubbub, a short-range version of Brouhaha. By Greg Strong.
- Hullabaloo. Fusion, fission game with drops, giant conglomerations and two types of activation. By Jeremy Gabriel Good.
- Hundred Acre Chess. Chess based on Winnie-the-Pooh. (10x10, Cells: 100) By Bob Greenwade.
- I'm a Wazir, Get Me Out of Here. A variant in which pieces disappear if left too long in the wrong place. (8x8, Cells: 64) By Charles Gilman.
- IAGO Chess System. http://abstractgamers.org/wiki/iago-chess. (8x8, Cells: 64) By Rich Hutnik.
- Icehouse . Set of pyramids you can play several games with, including Martian chess.
- Infinite Recursion Chess. Another mega-chess type game. (2x(8x8), Cells: 128) By David Howe.
- Influenced 8-Leveled 3D Alice Chess. A combination of Influence and Alice Chess on a 3D board. (8x(8x8), Cells: 512)
- Insane. Pieces change to random type when they move. With program playing this variant. Author: Hans L. Bodlaender. Inventor: Jari Huikari.
- Interweave. Game with elements of Checkers and Ultima where all pieces are colorbound and only capture pieces on the other color. (8x8, Cells: 64) By Peter Aronson.
- Interweave . Game with elements of Checkers and Ultima where all pieces are colorbound and only capture pieces on the other color. By Peter Aronson.
- It's not a job for King. Two relatively modest games, playing with power and royality. (8x8, Cells: 64) By Daniil Frolov.
- Jabberwocky Chess. Chess with transformations of pieces. (8x8, Cells: 64) By Вадря Покштя.
- Jai-Alai. A sports theme variant with three new pieces: the Superball, the Ball and the Diagball. (9x8, Cells: 72) By Roberto Lavieri.
- Jai-Alai . A sports theme variant with three new pieces: the Superball, the Ball and the Diagball. By Roberto Lavieri.
- Jester Chess. Featuring pieces that mimic last piece moved, archers that can either capture OR move. quadrapawns, and murray lions. Author: Jeremy Gabriel Good. Inventor: Thomas Havel.
- Jetan . Martian Chess, coming from the book The Chessmen of Mars. Author: Jens Markmann. Inventor: Edgar Rice Burroughs.
- Jetan - Martian Chess. Martian Chess, coming from the book The Chessmen of Mars. (10x10, Cells: 100) Author: Jean-Louis Cazaux and Hans L. Bodlaender. Inventor: Edgar Rice Burroughs.
- Jetan, ERB . Implements different possible rules for Jetan. Author: Larry L. Smith. Inventor: Edgar Rice Burroughs.
- Joe Joyce Hyperchess. Easy to play 3D Chess variant where pieces can act on small board or large board. Author: Jeremy Gabriel Good. Inventor: Joe Joyce.
- Joust . Two knights. Squares cannot be revisited. Author: Gerry Quinn.
- Joust. Missing description Author: Gerry Quinn.
- Joust. Two knights. Squares cannot be revisited. Author: Ed Friedlander.
- Joust Chess. Rotating pieces, long range movement, adjacent capture, both in one turn using different directions. By Jeff Cornell.
- Jurassic Chess. Dinosaur based chess variant played with regular chess pieces. (8x8, Cells: 64) Author: Arvind Pillai. Inventor: Tarun Gupta and Arvind Pillai.
- Kibitzing Vox Populi Chess variant. Rules for turning kibitzing into a game unto itself. By Rich Hutnik.
- King of the Ladder Tournament Rules. Ideas for rules to mix variants together in one game. (8x8, Cells: 64) By Rich Hutnik.
- King's Fortress Chess. Random setup with king's in opposite corners and extra pawns. Author: Ed Friedlander.
- King's Run . An entry for the 32-turn contest that is based on Logan's Run. By Fergus Duniho.
- King's Run. An entry for the 32-turn contest that is based on Logan's Run. By Fergus Duniho.
- Kingdom Chess. Large variant with new pieces. (10x10, Cells: 100) By Konklav Anipsal.
- Kings or Lemmings?. Normal chess except that a player can produce clones of his king.
- Knight Chase. Game played on with two Knights on a Chessboard with differing goals. (8x8, Cells: 64) Author: Jeff Rients. Inventor: Alex Randolph.
- Knight-Tac-Toe . Win by placing 3 pieces in a row. By David Howe.
- Knightliest Black Hole . Knighted pieces on a constantly diminishing board. By João Pedro Neto.
- The Knightliest Black Hole. Knighted pieces on a constantly diminishing board. By João Pedro Neto.
- Koopa Chess. Form of chess based on the Mario Brothers series of video games. (8x8, Cells: 64) Inventor: Ralph Betza.
- Kylatori Sunset. Small variant combining replacement, custodian and coordination capture. (6x8, Cells: 48) By Tim Stiles.
- Ladon Chess. Introducing the Ladon, a short-range piece that can repel any other piece, and also capture this way (zrf available). By M Winther.
- Laquear Chess. Introducing the Laquear, that captures like a bishop, but moves by the collision method (zrf available). By M Winther.
- Large Variants in the Historic North European Style. Missing description () By Charles Gilman.
- Laser Chess. Shoot lasers in chess variant from computer program. Author: Peter Venable. Inventor: Mike Duppong.
- Lichen Chess. Pieces are modular, and each piece may contain fragments belonging to both players. By Alexandre Muñiz.
- Lilliputian Monochromatic Alice Chess. All pieces are colorbound, and switch boards rather than switching color. (2x(6x7), Cells: 84) By Peter Aronson.
- Lilliputian Monochromatic Alice Chess . All pieces are colorbound, and switch boards rather than switching color. By Peter Aronson.
- List of Chess Variants. This is a large listing of chess variants. Author: Sam Trenholme.
- Litrof. Variant on 42 squares played with stacks of Icehouse pyramids, where different color pyramids give stacks different powers. (5x8, Cells: 42) By Glenn Overby II.
- Ludus Chessunculus. Game played on Hexagonal board with non-standard pieces. Author: Ed Friedlander. Inventor: John Cleaveland.
- Mad Elephant Chess . Pawns can be turned into Elephants; Elephants can promote to Mad Elephants, and Mad Elephants can trample lines of pieces. By Peter Aronson.
- Mad Elephant Chess. Pawns can be turned into Elephants; Elephants can promote to Mad Elephants, and Mad Elephants can trample lines of pieces. By Peter Aronson.
- Mad Scientist Chess. Fetch me the Pawn, Igor! (8x8, Cells: 64) By Peter Aronson.
- Maelstrom . All 64 squares of 8 by 8 board are initially filled with pieces. Author: David Howe. Inventor: Michael Asher.
- Maelstrom. All 64 squares of 8 by 8 board are initially filled with pieces. By Michael Asher.
- Maelstrom Chess. All 64 squares are initially occupied. Author: Ed Friedlander. Inventor: Michael Asher.
- Makarenko's Chess. Pieces are stacks which can be split and combined to create other pieces. Author: Jacek Dobrzyniecki. Inventor: Anton Makarenko.
- Makarenko's Chess . Pieces can split and combine in many ways. Four variants included. Author: Marek14 .
- Mamra Chess . Adds the Mamra, a piece that only Pawns may capture. By George Tsavdaris.
- Mamra Chess. Adds the Mamra, a piece that only Pawns may capture. Author: Tony Quintanilla and George Tsavdaris. Inventor: George Tsavdaris.
- Mamra Chess. Adds the Mamra, a piece that only Pawns may capture. (8x8, Cells: 66) By George Tsavdaris.
- Mangonel Chess. Introducing the remarkable Mangonel piece, which can hurl pieces over its head, on a Gustavian board (zrf available). By M Winther.
- Mapped Chess . Missing description By Stephane Burkhart.
- Martian Chess. Two or four player strategic game with chess elements played with Looney piramids. (4x8, Cells: 32) Author: Hans L. Bodlaender. Inventor: Andrew Looney.
- Martian Chess, Jetan. Large variant from the book The Chessmen of Mars. (10x10, Cells: 100) Author: Jean-Louis Cazaux and Hans L. Bodlaender. Inventor: Edgar Rice Burroughs.
- Mastery . A Game of Skill for Two Players. Inventor: S John Ross.
- Mathematichess. A chess variant specially designed for mathematicians. (8x8, Cells: 64) By Florin Lupusoru.
- Maze. Cooperative chesslike game; commercial game. Inventor: Jim Deacove.
- Medusa Shogi. Missing description Author: Larry L. Smith. Inventor: Gary K. Gifford.
- Medusa Shogi. Missing description (11x11, Cells: 121) By Gary K. Gifford.
- Meirav. Pieces are buried before they are captured, buried pieces may capture other buried pieces. (2x(8x8), Cells: 128) By כהן דותן.
- Meridian Chess. Introducing the Meridian, bishop-capture combined with bifurcated bounce-move, on an H-board (zrf available). By M Winther.
- Meta-chess Digital Edition. Digital Copy of 'Meta-chess' by John W Brown. Author: Sean Bass and John William Brown.
- Metamorph Chess . Variant in which pieces transform by fixed rules into other pieces. By Fergus Duniho.
- MetamorphaChess . Pieces represented by dice change to another type after having moved. Inventor: Robert Dubisch.
- Metamorphin Assimilation Chess . A hybrid of Metamorph Chess and Assimilation Chess. By Fergus Duniho.
- Metamorphin Fusion Chess . A hybrid of Metamorph Chess and Fusion Chess. By Fergus Duniho.
- Metamorphin' Assimilation Chess. A hybrid of Metamorph Chess and Assimilation Chess. By Fergus Duniho.
- Metamorphin' Fusion Chess. A hybrid of Metamorph Chess and Fusion Chess. By Fergus Duniho.
- Metamorphing Chess. Pieces upgrade when escaping, downgrade when capturing. Author: Ed Friedlander. Inventor: Fergus Duniho.
- Metamorpin'-Fusion A. Pieces are likely to proliferate. Author: Ed Friedlander. Inventor: Fergus Duniho.
- Metamorpin'-Fusion B. Pieces are likely to proliferate. Author: Ed Friedlander. Inventor: Fergus Duniho.
- Mind-Vector. Missing description (9x9, Cells: 81) By (zzo38) A. Black.
- Mir Chess. Play this variant that is mid-powered between Chess and Shatranj. Author: Fergus Duniho and David Paulowich. Inventor: David Paulowich.
- Mockery Chess. Missing description (8x8, Cells: 64) By Stephane Burkhart.
- Mortal Chessgi. A Chessgi game in which captures reduce material. (8x8, Cells: 64) By Fergus Duniho.
- Mortal Chessgi . A Chessgi game in which captures reduce material. By Fergus Duniho.
- Mortar Chess. Introducing another piece named Mortar, a form of cannon, on an H-shaped board. Positionally advanced. With zrf. By M Winther.
- Motorotor. Variant where two platforms slowly orbit a central board. (11x11, Cells: 43) By Gavin King.
- Motorotor. Play this small variant with a rotating board. Author: Fergus Duniho. Inventor: Gavin King.
- Mountain King Chess. First king to reach the center square of an 11 x 11 board wins. Author: Ed Friedlander. Inventor: Emmor Ray Sperry.
- Ms. Alice Chess. Alice Chess played on one board. Author: Ed Friedlander. Inventor: Vernon Rylands Parton.
- Mulligan Stew Chess . 42-Square Swapping-Mage Teleporting-Assassin Dual-Color-Bound-King Limited-Double-Move Leaping-Pawn Chess. By Peter Aronson.
- Mulligan Stew Chess. 42-Square Swapping-Mage Teleporting-Assassin Dual-Color-Bound-King Limited-Double-Move Leaping-Pawn Chess. (6x7, Cells: 42) By Peter Aronson.
- Multiple Formations. A proposal to add a set of formations to Chess. (8x8, Cells: 64) By Rich Hutnik.
- Murmillo Chess. Introducing the Murmillo piece, and new collision-capture, on a Gustavian board (zrf available). By M Winther.
- Musketeer Chess. Adding 2 newly designed extra pieces. (8x8, Cells: 64) By Zied Haddad.
- Mutant Chess . Pieces mutate during the game.
- Mutatis Mutandis. Astonishing variant featuring 22 different changelings at random setups. (8x8, Cells: 64) By Carlos Cetina.
- N-Plus-K Queens Problem Page. Missing description By Doug Chatham.
- Nach Schach. Missing description (8x7, Cells: 56) By Jianying Ji.
- Nachtmahr. Game with seven different kinds of Nightriders. (8x8, Cells: 64) By Jörg Knappen.
- Naiad Chess.. Introducing the Naiad, which moves like a queen but cannot capture. Instead it can kidnap pieces by magnetism (zrf available). By M Winther.
- Narrowness. Board filled with pawns and two kings per player. (8x8, Cells: 64) By Sergey Sirotkin.
- Narrowness Chess. Many pawns. Author: Ed Friedlander. Inventor: Sergey Sirotkin.
- Neighbors . Try to capture the most pieces on a 42-square board completely filled with neutral pieces. Author: Peter Aronson. Inventor: Rob Nierse.
- Neighbors. Try to capture the most pieces on a 42-square board completely filled with neutral pieces. (7x6, Cells: 42) By Rob Nierse.
- Nemoroth Notation. A notation and diagram scheme to be used when playing The Game of Nemoroth by mail or e-mail. By John Lawson.
- Nemoroth, The Game of. For the sake of your sanity, do not read this variant! (8x8, Cells: 64) By Ralph Betza.
- Nemoroth. A Visit to. Ralph visits Nemoroth in a dream, and reports a game by its greatest champion. By Ralph Betza.
- Ninny Chess. Classic board game. Author: Ed Friedlander.
- Ninny chess . Produced and sold in the early 70's by Parker Brothers. Arrows on squares determine direction pieces can move. Author: Fergus Duniho.
- No-Retreating Chess. A varient where you can't retreat until you get to the last rank. (8x8, Cells: 64) By Calvin Jack Pomerantz.
- Nostromo. As Ripley, save astronauts from the Alien. (8x8, Cells: 64) By Ilya Yudovski.
- Omega Chess Extended . Missing description By Mykola Dolgalov.
- Oxybeles Chess. Introducing the exceptional Oxybeles piece, which can hurl pieces over its head, on a Gustavian board (zrf available). By M Winther.
- Pacifist Chess. Missing description By Larry L. Smith.
- Pagan Chess. Game with two linked board, one for living pieces and one for dead pieces, and a special piece that can move between them. (11x7, Cells: 67) By Mikey Kousre.
- Palace Ninja Guards. A pair of short-range diagonal leapers and four extra squares are added to the standard chessboard and pieces. (8x8, Cells: 68) By Charles Daniel.
- Parallel Chess War. Play 4 chess games at once, first game won wins the whole war. (4x(8x8), Cells: 256) By Kevin Pacey.
- Parallel Chess War. Play 4 chess games at once, first game won wins the whole war. (4x(8x8), Cells: 256) By Kevin Pacey.
- PASGL 312 Chess. Critters steal lunch in the forest, while trying to get close to the campfire and avoid the train. (Cells: 68) By Ralph Betza.
- PASGL 312 Notation. A way to represent PASGL 312 Chess board positions. By John Lawson.
- Pawns Chess. Each pawn has a unique ability. (8x8, Cells: 64) By David Howe.
- Peg Chess. A terrain-based chess variant. (8x8, Cells: 64) By John Smith.
- Pegniar Chess. Introducing the Pegniar, a very interesting bifurcating bounce-slider, on a Gustavian board (zrf available). By M Winther.
- Penta War . Huge game with five clans. By Joost Aan de Brugh.
- Penta War. Huge game with five clans. (17x17, Cells: 319) By Joost Aan de Brugh.
- PentaPlay. Chess on a board of regular Pentagons. By Graeme C Neatham.
- Perfect Chess . On 8 by 8 board with combination pieces. Author: Marek14 . Inventor: Köksal Karakus.
- Perfect Chess. Rook, bishop, knight, plus each of the four compounds ("perfect"). Author: Ed Friedlander. Inventor: Köksal Karakus.
- Perfect Chess. On 8 by 8 board with combination pieces. By Köksal Karakus.
- The Philosophers' Game: Rithmomachia in Medieval and Renaissance. Missing description Author: Ann E. Moyer.
- Phylogenetic analyses of chess variants . Papers describing phylogenetic analyses of chess variants. Author: Lex Kraaijeveld.
- Pillow Chess . Chess on a Pillow-shaped board. Author: Abdul-Rahman Sibahi. Inventor: Grant Cairns.
- Plunderchess: Pictures and a review. Commercial variants where capturing gains the right to move once as the captured piece. (8x8, Cells: 64) Author: Hans L. Bodlaender. Inventor: Jeff Knight.
- Pocket Polypiece Chess 43. Game with off-board pocket where all pieces of a type change when one piece of a type is moved normally. (7x6, Cells: 43) By Antoine Fourrière.
- Pocket Polypiece Chess 43 . Game with off-board pocket where all pieces of a type change when one piece of a type is moved normally. By Antoine Fourrière.
- Poison Chess. Harpies can poison pieces which can be healed by doctors. On 8 by 8 board.
- Politically Correct Chess. Missing description (10x10, Cells: 100) By Larry L. Smith.
- Politically Correct Chess. Missing description By Larry L. Smith.
- Portal Chess. Two boards and pieces can teleport from one board to another. Also playable with two half-boards. (8x8, Cells: 64) By David Howe.
- Potential Chess. Pieces start out as any piece and become a particular piece depending on how they move,. By David Howe.
- Powerchess . Players have 24 pieces to start, with four new piece types.
- Presiding Chess. Decimal Variant combining a number of exotic pieces. Author: Jeremy Gabriel Good. Inventor: Tucker Kao.
- Promethean Chess. Units visiting the home squares of others leave behind duplicates. Author: Ed Friedlander.
- Promotions & Demotions. Every turn, the piece that has moved promotes or demotes to another piece. By João Pedro Neto.
- Promotions & Demotions . Every turn, the piece that has moved promotes or demotes to another piece. By João Pedro Neto.
- Protomorphic-Chess. Start with only kings (and pawns), pieces change to different type after move. (8x8, Cells: 64) By (zzo38) A. Black.
- Puzzle Shatranj. Shatranj on a 15 puzzle. (8x8, Cells: 60) By John Smith.
- Quadaptation. Use commanders to recruit better pieces. Capture your opponents commander and they lose. By realityreaper989.
- Race Chess. On a circular board where white and black pawns move in the same direction. (8x8, Cells: 64) By Ralph Betza.
- Racing Kings. Missing description By Abdul-Rahman Sibahi.
- Random Transposal Chess. Use dice to swap pieces. (8x8, Cells: 64) By John Smith.
- Recruiter Chess. Capturer recruits on adjacent squares. Author: Ed Friedlander. Inventor: Terry H. Jones.
- Red Fool Chess. Standard Chess, but with two extra rows and one semi autonomous piece, the Red Fool. By Amy Johnson.
- Refreshing Bubble Fizz Chess. When a piece moves, he can create a bubble. Pieces in bubbles cannot move for three turns, but may make two non-capturing moves. By Ralph Betza.
- Regenbogen. Unusual spectrum-based game with Wizards, Clerics and Spirits. (Cells: 44) By Jared B. McComb.
- Retiar Chess. Introducing the Retiar, a bifurcating bounce-slider, on an H-board (zrf available). By M Winther.
- Retrochess. Play chess from the end of the game backwards. (8x8, Cells: 64) By João Pedro Neto and Ralph Betza.
- Rhino Chess . Collection of variants designed to demonstrate the Rhino family of pieces. By Peter Aronson.
- Rithmomachia. Information on Rithmomachia. (16x8, Cells: 128) Author: Hans L. Bodlaender.
- Rithmomacia . Medieval game based on arithmetic and number theory.
- Rococo. A clear, aggressive Ultima variant on a 10x10 ring board. (10x10, Cells: 100) (Recognized!) Author: Peter Aronson. Inventor: Peter Aronson and David Howe.
- Rococo. A clear, aggressive Ultima variant on a 10x10 ring board (includes mirror array and Push-Pullyu variants). Author: Peter Aronson and Antoine Fourrière. Inventor: Peter Aronson and David Howe.
- Rococo . A clear, aggressive Ultima variant on a 10x10 ring board. Author: Peter Aronson. Inventor: Peter Aronson and David Howe.
- Rococo. Animated piece movement diagrams. By Peter Aronson and David Howe.
- Rococo Zillions Saved Game . Download this file to see this game played in the Multivariant Play by E-Mail Tournament. Author: Peter Aronson and John Lawson. Inventor: Peter Aronson and David Howe.
- Roswell Chess. Preset for alien game with abstract pieces that operate in unusual ways. Author: Jeremy Gabriel Good. Inventor: Gary K. Gifford.
- Royal-Copy Chess. Some pieces can gain power of captured pieces. (9x8, Cells: 72) By (zzo38) A. Black.
- Ruddigore Chess . Chessgi variant where you can capture your own pieces, and every other turn you must capture or sacrifice a piece. By Peter Aronson.
- Ruddigore Chess. Play this Chessgi variant where you can capture your own pieces, and every other turn you must capture or sacrifice a piece! Author: Tony Quintanilla and Peter Aronson. Inventor: Peter Aronson.
- Ruddigore Chess. Chessgi variant where you can capture your own pieces, and every other turn you must capture or sacrifice a piece. (8x8, Cells: 64) By Peter Aronson.
- Sagittar Chess. Introducing the Sagittar, a bifurcation cannon related to the Korean cannon, on an H-board (zrf available). By M Winther.
- Samnis Chess. Introducing the Samnis, which combines rook-capture with bifurcated bounce-movement, on a Gustavian board (zrf available). By M Winther.
- Schizochess. Halves of the chessboards get swapped every five moves. By Seth McGinnis.
- School Chess. Before movement of a figure, the player speaks the name of city on the letter, on which the name of a moved piece begins. By Sergey Sirotkin.
- Scrabble Battle Chess. Complicated game that uses a scrabble set, dice, playing cards with magic spells, pieces that move queenlike. By John Garwood.
- Secutor Chess. Introducing the Secutor piece, and new collision-capture, on a Gustavian board (zrf available). By M Winther.
- Seventeen Pawns. You can replace opponent's queen by nine pawns. (8x8, Cells: 64) By (zzo38) A. Black.
- Shamanic Chess. Pieces may be transformed into 'Shamans'. By M Winther.
- Shatra. Old game from the Altai from Russia, on special shaped board with draughts-like capture. Author: Fergus Duniho.
- Shatra . Old game from the Altai from Russia, on special shaped board with draughts-like capture. Author: Francis Monkman.
- Shatra . Old game from the Altai from Russia, on special shaped board with draughts-like capture.
- ShatraDev2 . Windows program to play Shatra against the computer. Author: Francis Monkman.
- Shatranj Elephants. Shatranj-like game, but with all short-range, limited-capturing pieces. By Christine Bagley-Jones.
- Shatranj Extended Tournament Scoring (S.E.T.S) Rules. An attempt at an improved scoring system for chess tournaments. (8x8, Cells: 64) By Rich Hutnik.
- Shatranj of Troy. A Shatranj variant with Shogi-like drops, a Trojan Horse (with 6 pieces inside),. (9x9, Cells: 81) By Gary K. Gifford.
- Shatranj of Troy. A Shatranj variant with Shogi-like drops, a Trojan Horse (with 6 pieces inside). Author: Larry L. Smith. Inventor: Gary K. Gifford.
- Shatranj of Troy. A Shatranj variant with Shogi-like drops, a Trojan Horse (with 6 pieces inside). By Gary K. Gifford.
- Shatranjian Shogi. Ferz and wazir, dabbaba and elephant offset each other in this new Shatranj drop game. Author: Jeremy Gabriel Good. Inventor: Gary K. Gifford.
- Shock Troops. System of chess with standard board and pieces, but with new leaping pieces entering during play. By Charles Daniel.
- Shock Troops . Make a regular move or drop one of two pieces into a vacant space in the back rank. By Charles Daniel.
- Shock Troops. The usual chess until the War Knight, Elephant Knight and Ninja Pawns enter the game. (8x8, Cells: 64) By Charles Daniel.
- Shogi, Mortal Shogi, and Kamikaze Mortal Shogi . Play Shogi and a couple variants with diminishing pieces. Author: Fergus Duniho. Inventor: Fergus Duniho and Roberto Lavieri.
- Shuuro. Large variant where you build your own army. (12x12, Cells: 144) Author: Alberto Giusti. Inventor: Alessio Cavatore.
- Sigma 4 Shogi. Missing description (7x7, Cells: 49) By Daniel Roth.
- Sir Bombalot. A variant of chess with pieces offering a myriad of different options at any given time. Inventor: Bruce Harper and Duncan Suttles.
- Skidoo Chess. Pieces can "skidoo" into an interior board. (2x(8x8), Cells: 128) By John Smith.
- Smegi . Arrows on squares show where pieces can go - crossover between Smess and Shogi. By Fergus Duniho.
- Smegi. Arrows on squares show where pieces can go - crossover between Smess and Shogi. (5x8, Cells: 40) By Fergus Duniho.
- Smess . Produced and sold in the early 70's by Parker Brothers. Arrows on squares determine direction pieces can move. Author: Fergus Duniho.
- Smess. Produced and sold in the early 70's by Parker Brothers. Arrows on squares determine direction pieces can move. (7x8, Cells: 56) (Recognized!) Author: Fergus Duniho and David Howe. Inventor: Perry Grant and Reuben Klamer.
- The Sons of Mithra. Computer program for playing fantasy variant. Author: Michael Chang Gummelt. Inventor: Michael Chang Gummelt and Holly Gummelt.
- The Sons of Mithra. Elaborate Fantasy variant with 13 different types of pieces per side. (10x10, Cells: 100) Author: Michael Chang Gummelt. Inventor: Michael Chang Gummelt and Holly Gummelt.
- Sorchess. A somewhat unorthodox Wizard enters the 64sq arena, yet with good charm. By Simon Edward Jepps.
- Spartan Skaki. Missing description (9x9, Cells: 81) By Larry L. Smith.
- Spherical Guard Chess. Hiashatar (Mongol Grand Chess) on a spherical board. (10x10, Cells: 100) By Graeme C Neatham.
- Spherical Guard Chess . Play with either the single-board or dual-board sphere projection . By Graeme C Neatham.
- Spot the Intruder Mini-game. A mini-game by H. G. Muller. Spot the intruder as quickly as possible! (12x12, Cells: 144) Author: A. M. DeWitt and H. G. Muller. Inventor: H. G. Muller.
- Stanley Random Chess . Missing description Author: Fergus Duniho. Inventor: Austin Lockwood.
- Stheno Chess. Introducing the repulsive Stheno, which repels pieces as far as possible in the alignment direction (zrf available). By M Winther.
- Stones and Relays. Pieces get to re-originate from neutral relay squares they attack. Author: Jeremy Gabriel Good. Inventor: Jim Aikin.
- Stylish victory or stylish fail. Missing description (8x8, Cells: 64) By Daniil Frolov.
- Subversion / Conversion. Pieces can be bribed to switch sides. By Terry H. Jones.
- Suction Chess. Pieces swap places instead of being removed from the board, resulting in very different strategy. By Nathaniel Virgo.
- Super-Chess. www.oteroideas.com. By Superuser .
- Superschaak. Book and sets for playing variants with many new types of chess pieces. Author: Hans L. Bodlaender. Inventor: Henk van Haeringen.
- Switch-Side Chain-Chess. Optionally swap sides with your opponent upon completing a "chain". (8x8, Cells: 64) By Azlan Iqbal.
- Symmetric Monster Chess. Some pieces are single and some are double. (8x8, Cells: 72) By (zzo38) A. Black.
- Symmetric Snark Hunting. Snark hunting game with symmetric positions. (6x11, Cells: 59) By (zzo38) A. Black.
- Symmetric Unirexal Chess. Each player has a half of a king. (8x8, Cells: 64) By (zzo38) A. Black.
- TaflChess. A mix of FIDE chess and the old European game Tafl. (8x8, Cells: 64) By Rich Hutnik.
- Take the Brain. British name of Smess, a Parker Brothers game in which arrows on squares determine the directions pieces may move. (7x8, Cells: 56) (Recognized!) Author: Fergus Duniho and David Howe. Inventor: Perry Grant and Reuben Klamer.
- Tank Chess. Upgrade your tank to defeat others. By Alexander Mach.
- Thinktank Chess. Frank Maus' game where most pieces move differently when capturing from how they move without capturing. Author: Sergey Sirotkin and Peter Aronson. Inventor: Frank Maus.
- Thinktank Chess . Frank Maus' game where most pieces move differently when capturing from how they move without capturing. Author: Peter Aronson. Inventor: Frank Maus.
- Thraex_Chess. Introducing the Thraex, which captures like a rook, but moves by the bifurcated jump method (zrf available). By M Winther.
- Three Elephant Chess. War Towers destroy 3 spaces at a time - protect your elephants while capturing your opponent's. (9x9, Cells: 81) By Gary K. Gifford.
- Three Elephants Chess. War Towers destroy 3 spaces at a time - Protect your elephants while capturing your opponent's! Author: Jeremy Gabriel Good. Inventor: Gary K. Gifford.
- Three Fat Brothers Chess. On a 9x9 board with 3 royal pieces. (9x9, Cells: 81) By Sergey Sirotkin.
- Three Fat Brothers Chess . On a 9x9 board with 3 royal pieces. Author: Marek14 . Inventor: Sergey Sirotkin.
- Three Symbols Multi-state Chess. Write move in 3 symbols and any move that is like what you wrote is possible. (8x8, Cells: 64) By (zzo38) A. Black.
- Thunder Chess . A hybrid of Metamorph Chess, Fusion Chess, and Assimilation Chess. By Fergus Duniho.
- TigerChess. Variant themed after a medieval battle. (8x8, Cells: 64) By Glenn Nicholls.
- Too Many Bishops. Place an enemy bishop after your own move. Author: Ed Friedlander. Inventor: C. Pickover.
- Too Many Bishops. Players get each turn one extra bishop, placed by their opponent. (8x8, Cells: 64) Author: Hans L. Bodlaender.
- Tournoy . Pieces have orientation that can be rotated. By Jean-Louis Cazaux.
- Tournoy. Pieces have orientation that can be rotated. (9x9, Cells: 81) By Jean-Louis Cazaux.
- The Tower Game. A simple three dimensional chess variant. (8x(5x5), Cells: 200) Author: Abdul-Rahman Sibahi.
- Transporter Chess. In addition to the usual set of pieces, players have a transporter piece, which can transport pieces one square in any direction. (8x8, Cells: 64) Author: Hans L. Bodlaender. Inventor: Torben Osted.
- The Travelers. Missing description (9x9, Cells: 81) By Roberto Lavieri.
- Trissa. A Rococo-inspired hexagonal variant for three players with an unusual flavor. (10x10, Cells: 55) By John Smith.
- Trophy Hunt Chess. Capture at least one of each trophy animal to win. Author: Douglas Silfen and Karl Scherer.
- Turnover. Three ring sizes fit into each other, combining and splitting into different pieces, sometimes taking over your opponent's. By Lúcio José Patrocínio Filho.
- Turret Chess. Introducing the Turret, which moves like a queen, and can hurl pieces over its head (zrf available). By M Winther.
- Tutti Frutti Chess . With bishop-knight, knight-rook, queen-knight and the usual pieces on an 8 by 8 board. Author: Uwe Wiedemann. Inventor: Ralph Betza.
- Tutti Frutti Chess. Eight different pieces. Author: Ed Friedlander. Inventor: Ralph Betza.
- Tutti-Frutti Chess. With bishop-knight, knight-rook, queen-knight and the usual pieces on an 8 by 8 board. (8x8, Cells: 64) Author: Hans L. Bodlaender. Inventor: Ralph Betza and Philip M. Cohen.
- Tutti-Frutti Chess. Play this variant in which compounds replace some standard Chess pieces on Jocly. Author: Michel Gutierrez and Jean-Louis Cazaux. Inventor: Ralph Betza and Philip M. Cohen.
- Ultima . Version using Alfaerie graphics. Author: David Howe. Inventor: Robert Abbott.
- Ultima. Game where each type of piece has a different capturing ability. (Recognized!) Author: Fergus Duniho. Inventor: Robert Abbott.
- Ultima. Game where each type of piece has a different capturing ability. Also called Baroque. (8x8, Cells: 64) (Recognized!) Author: Hans L. Bodlaender and Fergus Duniho. Inventor: Robert Abbott.
- Ultima Problem #3. The 3rd in a series of Ultima puzzles. By Robert Abbott.
- Ultima Problem #9. The 9th in a series of Ultima puzzles. By Robert Abbott.
- Ultima with Alternate Graphics . Game where each type of piece has a different capturing ability. Author: David Howe. Inventor: Robert Abbott.
- Vavulin Creative Chess. Before the start of the game, every player, creates up with one rule for both players, which operates the whole game. By Dmitrii Vavulin.
- Venator Chess. Introducing the Venator, a bifurcation cannon related to the Korean cannon, on a Gustavian board (zrf available). By M Winther.
- Vietnamese Chess . Each player has a King, which captures cannon-style, and 11 non-capturing Pawns on a 25-intersection Alquerque-style board. Author: Marek14 .
- A Visit to Nemoroth. Ralph visits Nemoroth in a dream, and reports a game by its greatest champion. By Ralph Betza.