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- "Ninth-Ray" Jetan. Missing description (5x20, Cells: 100)
- 10x10 game with some popular pieces. Missing description (10x10, Cells: 104)
- 12 Sharp Chess. 4-player versions of 10-or-more-file variants on cross-shaped boards. (12x12, Cells: 108)
- 16Chess. Game with 4 royal pieces.
- 2 Jewels. Larger version of Pink Panther Chess with second jewel and common Thieves. (9x10, Cells: 90)
- 21st Century Chess. An updating of Chess for the video game generation, on a 10x8 board with Barons and Jesters. (10x8, Cells: 80)
- 3 Player Chess. On a large (217 hexagon) board.
- 3-Player Chess I. Missing description (10x10, Cells: 75)
- 4 Armies. Each player controls two armies. (10x10, Cells: 100)
- 4 Kings Quasi-Shatranj. Each side has 4 Kings, all pieces are short range. (10x10, Cells: 100)
- 4 Linepiece Fusion. Variants in which straight linepieces get to fuse with Crooked or Bent ones. (9x8, Cells: 72)
- 4*Chess (four dimensional chess). Four dimensional chess using sixteen 4x4 boards & 96 pieces. (4x(4x(4x4)), Cells: 256)
- 5*4DChess (four dimensional chess). Four dimensional chess variant played with 140 pieces. (5x(5x(5x5)), Cells: 625)
- 9x9 Squares Rotating Chess. Usual set of pieces in different setup and changed movement on 9 by 9 board. (9x9, Cells: 81)
- A9 HexaChess (Imperial Grand HexaChess). Large variant of Grand Hexachess. (Cells: 169)
- Abecedarian Big Chess (ABChess). Buy-your-own-army variant on a big board; 26 piece types. (11x11, Cells: 121)
- Aberg's variation of Capablanca's Chess. Different setup and castling rules. (10x8, Cells: 80)
- Achernar. ACHERNAR is a mix of the game ALTAIR and Western Chess. (9x9, Cells: 81)
- Advanced Wizard Chess. Chess variant on 10 by 10 board with fantasy chess pieces. (10x10, Cells: 100)
- Agincourt. Decimal variant with Archers. (10x10, Cells: 100)
- Aieirping Chess. Missing description (29x14, Cells: 406)
- Aire. River variant on H-shaped board, some parts of camps further back than others. (8x12, Cells: 72)
- Airplane Chess. Schmittberger's big-board variant featuring the very mobile Airplane (with zrf).
- Ajax Bigamous Chess. Bigamy meets Ajax Orthodox Chess! (9x8, Cells: 72)
- Ajax Chess. All pieces have can play one square in any direction, the Mastodon leaper complements the Knight. (10x10, Cells: 100)
- Ajax Falcon Chess. Ajax Chess on a 10x8 board with two Ajax Falcon drops. (10x8, Cells: 100)
- Ajax Modern Random Chess. Missing description (9x9, Cells: 81)
- Ajax-Capablanca Chess. Ajax-Chessmen on a 10x8 Capablanca Board! (10x8, Cells: 80)
- Al-Ces. Variant on 10 by 10 board with 30 pieces per player. (10x10, Cells: 100)
- Alibishogi. Variant with Shogi-style promotion and drops themed on Alibaba and 40 Thieves. (10x10, Cells: 100)
- Alien and Predators Symmetric. Missing description (10x10, Cells: 100)
- Aliens vs Predators. Missing description (10x10, Cells: 100)
- Aliens Vs Predators Episode II (L.Smith Version). Missing description (10x10, Cells: 100)
- Alpha Centauri. A very complex game, somewhat exotic, with some elements from Rococo. (9x9, Cells: 81)
- Alseid Chess. Introducing the Alseid, which moves like a queen but cannot capture. Instead it can kidnap piece behind a screen (zrf exists).
- Altair. Altair is a modern game with an oriental flavor. (9x9, Cells: 81)
- Amazon Grand Chess. A combination of Grand Chess and Amazon Chess. (10x10, Cells: 100)
- Amazonia. 11x11 board with Pawns that promote to Princesses in the middle of the board.
- Amazons. Amazons and a computer version.
- American Chess. Large variant. Remove Generals from center columns to win.
- Amiral Chess. Introducing the Amiral piece and the bounce-capture method on a Gustavian board (zrf available).
- Angel Chess. D'Autremont's very aggressive variant featuring Amazons that cannot be exchanged (with zrf).
- Antarctic Chess or Predators and Penguins. Penguins seek safety at the ice-pack's centre. Can the Predators stop them? (Cells: 295)
- Apothecary Chess-Classic. Large board variant obtained through tinkering with known games.
- Apothecary Chess-Modern. Large board variant obtained through tinkering with known games.
- Aquachess. One level underwater, one on the surface, and one in the sky, with many strange pieces. (3x(8x8), Cells: 192)
- Arabian Nights Chess. Large modern variant of historic Shatranj, with more pieces and flying carpets. (11x9, Cells: 84)
- Archchess. Large chess variant from 17th century Italy. (10x10, Cells: 100)
- ArchCourier Chess. This game is Courier Chess expert Eric Greenwood's modernization of Courier Chess. (12x8, Cells: 96)
- Arena Cheturshogqi. 2-4 Players on large board with mutating pieces and piece drops. (13x13, Cells: 169)
- Armamentist Race Chess. Missing description (10x12, Cells: 116)
- Armis. 100 square board with 15 piece types.
- Assassination Chess. On a 10 by 10 board with teleporters and assassins. (10x10, Cells: 100)
- Asylum Chess. 3 new unique pieces: fire-through rooks, double-capture knights, leaping bishops. (10x10, Cells: 100)
- Asylum Redux. Two new pieces: dual path sliding Zebra + Bishop and a dual path sliding Camel + Rook. (10x10, Cells: 100)
- Atlantean Barroom Shatranj. Atlantean Barroom Shatranj Rules. (10x10, Cells: 100)
- Attendance Chess. 10 piece types that can move to 10 squares each, mostly. (10x10, Cells: 100)
- Attrition Chess. Played on an 11x10 board, each player starts with 33 pieces. (11x10, Cells: 110)
- Avon. Four-player game; two players sharing the White and two the Black pieces. (8x10, Cells: 80)
- Azchess. Missing description (10x10, Cells: 100)
- AzsymChess. Missing description (10x10, Cells: 100)
- BacCanCat. 4-player variant with Cannons and Arrows, Cathedralling, and alternative ways to win. (16x16, Cells: 256)
- Bach Dang Chess. On board with 100 squares, with crafts and other special pieces and rules. (10x10, Cells: 100)
- Bachelor Hunterbeest. Hunterbeest without the Queen or Gnu - to start with... (9x8, Cells: 72)
- Bachelor Kamil. Combines ideas from Bachelor Chess and Wildebeest Chess. (9x8, Cells: 72)
- Bachelor Nearlydouble. Applying the Nearlydouble principle to Bachelor Chess. (9x9, Cells: 81)
- Back-to-Back Chess. Both sides start "Back-to-Back", seperated by an uncrossable line on a specially-shaped 100 square board. (14x8, Cells: 100)
- Baseball Chess 2. Missing description (9x9, Cells: 81)
- Baseball Chess Hits & HomeRuns. Missing description
- Basic Bestiary. Like Wildeurasian Bestiary but without the Hopping-capture pieces. (13x12, Cells: 156)
- Battle Chieftain Chess. Warriors and a king fight on a board with walls and holes. (10x11, Cells: 84)
- Battle of the Six Armies. Construction of board and pieces to play B6A.
- Battle of the Six Armies. Multiplayer with a trigonal board. (29x18, Cells: 378)
- Battlefront Chess. Game with standard pieces, 12 pawns, 2 Generals, the Archbishop, and the Chancellor. (12x8, Cells: 96)
- Bear Chess. A popular Russian game; bears leap to second perimeter.
- Beastmaster Chess. Large chess variant with a fantasy theme, emphasizing leaping pieces. (8x11, Cells: 84)
- Beau Monde Chess. Large variant where pieces move with variations of the Queen move. (11x10, Cells: 100)
- Beautiful Sun Chess (Meiriqi). A 10x10 blend of FIDE, Shogi, and Xiangqi influences. (10x10, Cells: 100)
- Bede Chess. Missing description (9x11, Cells: 99)
- Belfry Chess. Introducing the belfry catapult.
- The Bermuda Chess Angle. Pieces can vanish in a central grid (The Bermuda Chess Angle) depending on dice-determined coordinates. (10x10, Cells: 100)
- Besiege Chess. Double height chess board, where black is surrounded by white. (8x16, Cells: 128)
- Beyond Omega. Large abstract variant with radial and oblique pieces requiring rotation. (15x15, Cells: 225)
- Bifocal Chess. A game without capture : win by checkmate with a neutral piece! (9x9, Cells: 81)
- Big Battle. Commercial chess variant on 10 by 10 board. (10x10, Cells: 100)
- Big Battle. Large (10x10), commercial variant.
- Big Board Chess. On a 10 by 10 board with individual opening setup. (10x10, Cells: 100)
- Big Chess. Chess variant on a 14 by 8 square board with extra Pawns, Knights and Bishops. (14x8, Cells: 112)
- Big Outer Chess. Large variant with concentric circles on the board, so there is less concentration on the centre. (12x12, Cells: 148)
- Bigorra. A 16x16 board chess with all pieces from my variants. (16x16, Cells: 256)
- Bigsiege Chess. Combining the length of Besiege Chess with the width of Doublewidth Chess. (16x16, Cells: 256)
- Bilateral Chess. Game on 12x8 board adding Lions, switching Cannons, Wizards and pushing Elephants, but keeping the standard array in the middle. (12x8, Cells: 96)
- Bird's Chess. Chess variant on 10 by 8 board from 19th century England. (10x8, Cells: 80)
- Birds and Ninjas. Strategically rich chess-like game with powerful dual range orthogonal flying pieces, and short-range diagonal leapers. (10x10, Cells: 104)
- The Bishop Adjustment Rule. Missing description
- Bishops Conversion Rule. Rule for variant where bishops start on equal colored squares, with sample games.
- Black Hole Chess. Variant on board with 100 squares with hole in middle of board, combination pieces and hiding squares for kings. (9x11, Cells: 100)
- Blocschach. Not only is the size of the back rank squared, so is its composition. (8x(8x8), Cells: 512)
- Bodyguard Chess. A 9x9 variant, with a Bodyguard and two Kwaggas per side (zrf available).
- Bollwerk 178. Occupying the opponent’s end field with a piece or a bomb.
- Bolyar Chess. A historical variant, native to Bulgaria, with imaginative rules (zrf available).
- Bombardier Chess. Introducing the Bombardier, combining a rook with a camelrider (zrf exists).
- Bomberman Chess. Variant on 8 by 10 board with bombs and diffusers. (10x8, Cells: 80)
- Brusky's Hexagonal Chess. Hexagonal adaptation of Chess with horizontal ranks. (8x12, Cells: 84)
- Buccaneer Chess. Introducing the Buccaneer and the bounce-move, whereby the piece bounces diagonally away from its course (zrf available).
- Cagliostro's Chess. Variant on 12 by 8 board with combination pieces. (12x8, Cells: 96)
- Caïssa Britannia. British themed variant with Lions, Unicorns, Dragons, Anglican Bishops, and a royal Queen. (10x10, Cells: 100)
- Camblam. On a 12x12 board with archers, catapults and other enhanced pieces. (12x12, Cells: 144)
- Camel and Rhino Chess. Variant on 10 by 10 board with new pieces. (10x10, Cells: 100)
- Camel Decimal Chess. Decimal Chess with Camel. (10x10, Cells: 100)
- Camelopard Chess. Game with Camelopards. (12x12, Cells: 144)
- Cannon Shosu Shogi. Variant of Shosu Shogi with Dogs and Cannons.
- Cannons of Chesstonia. Cannons launch a Pawn, Wazir, Ferz and Stone to increase strategical and tactical play. (12x8, Cells: 80)
- Canoness Chess. Chess with Cannons and Canonesses (Vaos) on a differently-shaped board. (10x10, Cells: 88)
- Canonical Chess Variants. A family of chess variants that blends Xiang Qi and Western Chess. (9x9, Cells: 81)
- Capablanca Random Chess. Randomized setup for Capablanca chess. (10x8, Cells: 80)
- Capablanca Relocation Chess. The Capablanca piece array can in one move be rearranged, creating 144 different board positions (with zrf).
- Capablanca's chess. An enlarged chess variant, proposed by Capablanca. (10x8, Cells: 80) (Recognized!)
- Capatomic Random Chess. Variant that combines Capablanca Random and Stratomic Chess.
- Captain's Chess. Missing description (9x8, Cells: 72)
- CARDCHESS. Utilizes the two key elements of card games: four suits and the ability to place cards face down to hide their values. (10x10, Cells: 100)
- Cardinal Super Chess Home Page. Link to company site.
- Cardmate. Chess variant on board with 100 squares, inspired by card games. (10x10, Cells: 100)
- Carnage. Featuring the Terror Freeze, Detonator and the Dragon that attack the enemy in 4 different ways. (10x10, Cells: 100)
- Carrera's Chess. Large chess variant from 17th century Italy. (10x8, Cells: 80)
- Cashew Shogi. Many pieces must promote on capture, and some can multi-capture. (13x13, Cells: 169)
- Castalia Chess. Introducing the Castalia, which moves like a queen but cannot capture. Instead it can magnetically dislocate pieces (zrf exists).
- Cat's Chess. Missing description (10x10, Cells: 100)
- Cataclysm. Large board game with short-range pieces designed to be dramatic without being overly complicated or dragging on too long. (12x16, Cells: 192)
- Catapults of Troy. Large variant with a river, catapults, archers, and trojan horses! (8x11, Cells: 88)
- CC chess. Missing description (10x10, Cells: 100)
- CCC - The Clash of Civilizations Chess. Missing description (10x10, Cells: 100)
- CCChess Final Fight. Missing description (10x10, Cells: 100)
- Centennial Chess. 10x10 Variant that adds Camels, Stewards, Rotating Spearmen and Murray Lions to the standard mix. (10x10, Cells: 100)
- Chancellor Chess. On a 9 by 9 or 9 by 8 board with a piece with combined rook and knight moves. (9x9, Cells: 81)
- Chariots. Standard pieces start as pairs with shared capabilities, but can separate and recombine. (10x10, Cells: 100)
- Chaturanga 4-84. An Updating of Chaturanga for Four Players with modern pieces and an 84-square board. (10x10, Cells: 84)
- Chesimal Fusion I. Missing description (16x12)
- Chesimals: Autonomous Multi-unit Pieces. self-contained autonomous multi-square pieces. (16x12, Cells: 192)
- ChesK: Risk and Chess Combination. A combination of the classic chess and Risk.
- Chesquerque. Variant played on a quadruple Alquerque board. (9x9, Cells: 81)
- Chess 1010. Game played with 40 pieces. (10x10, Cells: 100)
- Chess 112. Large variant on an 8x12 board. (14x8, Cells: 112)
- Chess 121. Large chess variant with Demo Dos-program. (11x11, Cells: 121)
- Chess 256. The Chess experience upscaled to a larger board. (16x16, Cells: 256)
- Chess 911. 9x9 board plus corner squares, compounds, and special diagonals. (9x9, Cells: 85)
- Chess 99. Game with 9 pawns and a paladin. The objective is to capture the opponent's king. Many rules altered.
- Chess and a Half. Game with extra leapers.
- Chess Cubed on Steam. Chess on a Puzzle Cube with standard pieces and rotations.
- Chess Dial. Play starts with Shogi, then mutates into Xiang Qi, then FIDE Chess, then Shogi again! (9x10, Cells: 90)
- Chess Empire. Large four player chess variant. (20x20, Cells: 322)
- Chess II. Two extra files with two additional pieces (princes) on each side. (10x8, Cells: 80)
- Chess Legions. Decimal variant with extra, exotic pieces.
- Chess of Amazons. Chess played on a 10x10 board with all FIDE pieces, but extra pawns, and the Amazon piece from the Game of Amazons.
- Chess on a 12 by 12 board. Orthodox chess but with additional squares around the setup. (12x12, Cells: 144)
- Chess on a Larger Board with not so few Pieces Dropped. Game with an interesting mix of Orthochess and Exotic pieces, some of which start in-hand. (12x8, Cells: 96)
- 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)
- Chess on a Really Big Board. Chess on multiple chess boards. (16x16, Cells: 256)
- Chess on a Tesseract. Chess played over the 24 two-dimensional sides of a tesseract. (24x(5x5), Cells: 504)
- Chess on an Infinite Plane. Chess game with no boundaries (infinite board), and Guard, Chancellor, and Hawk. ()
- Chess with Batteries. Special Battery piece which augments the powers of other pieces. (10x10, Cells: 100)
- Chess with Ultima, Rococo and Supremo Pieces. A series of variants with the Orthochess array transplanted to a 10x10 board and various exotic pieces added. (10x10, Cells: 100)
- Chess with Wizards. A Decimal Chess Variant with Antoine Fourri. (10x10, Cells: 100)
- Chess'3. Chess variant on 10 by 10 board. (10x10, Cells: 100)
- Chess-Battle. War variant from the Soviet-Union, 1933. (12x12, Cells: 128)
- Chess/Aces. A large Chess variant based on modern FIDE chess pieces as well as on traditional ancient pieces. (12x8, Cells: 96)
- Chess2 ~ A New Game of Chess for a New Generation of Players. Decimal Chess variant with two new pieces. (10x10, Cells: 100)
- Chess99. Large progressive chess variant, where pieces gain progressive capabilities as the game develops. (9x11, Cells: 99)
- CHESSAGON. CHESSAGON® is like traditional Chess, but with Triangles, with one new additional piece named the Duke.
- ChessArena.io. Real-time, many-player, "io-style" game.
- Chesseract. Four dimensional chess variant. (4x(4x(4x4)), Cells: 256)
- Chessma 84. Game with elements of Chess and Ultima on a board with two levels with special corner squares. (2x(10x10), Cells: 84)
- Chessoids: SuperPawn and NeutronChess. A large and complicated chess variant. (11x10, Cells: 111)
- Chessopoly. Board with a hole in the middle where pawns move clockwise. (12x12, Cells: 128)
- Chieftain Chess. Missing description (16x12, Cells: 192)
- Chinese Chess.. An strong Zillions implementation plus a description of the world's most popular game.
- Chivalry. With 30 pieces on a 10 by 10 board. (10x10, Cells: 100)
- Chu Kagamigi. Larger extension of Kagamigi, with pieces biased toward the center. (12x12, Cells: 144)
- Chu Seireigi. Variant of Chu Shogi playable with drops. (12x12, Cells: 144)
- Chu Shogi. Historic Japanese favorite, featuring a multi-capturing Lion. (12x12, Cells: 144) (Recognized!)
- Circular Capa Chess. Play circular chess with added archbishops and chancellors on a 5x16 round board. (5x16, Cells: 80)
- Citadel Chess. A variant of Shatranj, played on a ten by ten board with four extra citadels. (10x10, Cells: 104)
- Citadelir chess. Grand chess + Tamerlane chess + Omega Chess.
- The Clash of Civilization Chess (Shuffle Version). Missing description (10x10, Cells: 100)
- The Clash of Civilizations Chess. Missing description (10x10, Cells: 100)
- Clash of the Civilizations Chess - new setup. Clash of theCivilizations -new setup. (10x10, Cells: 100)
- Cobra Chess. Variant on 10 by 10 board with new pieces, including the Cobra. (10x10, Cells: 100)
- Coherent Chess. Variant on 9 by 9 board with special knights. (9x9, Cells: 81)
- Colorful Osmosis Chess. All basic pieces are colorbound or colorwithching. (10x10, Cells: 100)
- Colossus. Large-board chess with standard pieces and double the number of bishops, rooks and knights. (10x10, Cells: 100)
- Columbiad Chess.. Introducing the Columbiad, combining a cannon and a Cannonrider, on an H-board (zrf exists).
- Combination Chess. Large chess variant with combination pieces.
- Command and Maneuver: A Tale of Two Countries. This is a diceless wargame,. (24x12, Cells: 288)
- Commedia dell'Arte Chess. A Pawnless variant with themed pieces on a 10x10 board with 5 square groups of 4 cells removed. (10x10, Cells: 80)
- Comments on Grand Chess. Notes on Grand Chess and a variant. (10x10, Cells: 100)
- Complete Chess. with a riding and a leaping piece family.
- Complete Permutation Chess. Game with all possible combinations of Falcon, Rook, Bishop and Knight on the back row. (16x8, Cells: 128)
- Compound Chess. Chess on a 10x8 board with Sergeant pawns & armies of compound pieces. (10x8, Cells: 80)
- Compound Courier Custom Chess. Game uses the Courier 12x8 board and adds knight compound pieces. (12x8, Cells: 96)
- Conclave Ecumenical Chess. Large variant with wide variety of Rook and Bishop compounds. (9x12, Cells: 108)
- Conservative Capablanca Chess. Alternative, more traditional Capablanca chess setup.
- Constable Chess. Introducing the Constable piece on an H-shaped board. A game for attacking players. With zrf.
- Conveyor Chess. Large variant with conveyor belt on middle of board. (12x12, Cells: 144)
- Coordinator Chess. Dekle's Coordinator Chess, featuring the Coordinator that captures in coordination with the king (with zrf).
- A Cornucopia of 9x9 Corner variants. The title speaks for itself. (9x9, Cells: 81)
- Correlator Chess. Introducing the Correlator which captures by correlating with the king (with zrf).
- Counsellor Chess. Variant on 12 by 8 board that adds Elephants and Counsellors. (12x8, Cells: 96)
- Courier 'de la Dama'. Courier Chess with a Modern Queen and Crooked Bishops. (12x8, Cells: 96)
- Courier Chess. A large historic variant from Medieval Europe. (12x8, Cells: 96) (Recognized!)
- Courier Chess (modified). Missing description (8x12, Cells: 96)
- Courier Chess - Printable Rule Booklet - FREE DOWNLOAD. Easy to Print Concise Rule Booklet of the Medieval Courier Game.
- Courier de los Combinados. A cross between Courier de la Dama and Wildebeest Chess. (12x8, Cells: 96)
- The Courier Game. Description of Courier Chess, with printable pieces and board. (12x8, Cells: 96)
- Courier-Spiel. 19th century variant of Courier Chess. (12x8, Cells: 96)
- Cross-Eyed Chess. Two player variant on cross-shaped board. (12x12, Cells: 84)
- Crossbishop Chess. Introducing the Crossbishop piece, with interesting cannon capabilities (Zillions file downloadable).
- Crossbishop_Chess (8x10). A big-board variant featuring the new Crossbishop piece, an advanced cannon relative (Zillions file downloadable).
- Crossrook Chess. Introducing the Crossrook, a versatile piece with cannon capabilities (Zillions file downloadable).
- Cube-Surface Board Chesses. Missing description (6x(8x8), Cells: 384)
- Cypher Chess. Game with novel piece.
- Dabbabante Chess. Played on a 10x10 board with Super Dabbabah pieces. (10x10, Cells: 100)
- Dada. The colorbound chess variant. (7x10, Cells: 70)
- Dai Dai Shogi. Historical large Shogi variant. (17x17, Cells: 289)
- Dai Dai Shogi Western. Missing description (17x17, Cells: 289)
- Dai Kagamigi. Even larger version of Kagamigi, with pieces biased toward the center. (15x15, Cells: 225)
- Dai Mitregi. Still larger Mitregi offshoot, replacing the Generals with longer-range pieces. (16x16, Cells: 256)
- Dai Seireigi. Variant of Dai Shogi playable with drops. (15x15, Cells: 225)
- Dai Shogi. Shogi variant on 15 by 15 board. (Link.).
- Dai Shogi. Large armies including a multi-capturing Lion battle each other on a big board. (15x15, Cells: 225)
- Dai-Ryu Shogi. Large Shogi variant with new pieces. (9x16, Cells: 144)
- Dartboard Chess. circular all-three-compounds variant, with different orthogonal ranges on different files. (5x20, Cells: 100)
- DCP.WOZ Chess. Large variant with unorthodox pieces. (9x10, Cells: 90)
- Dead Ringers Chess. Double chess game with twin pieces that are captured simultaneously. (2x(8x8), Cells: 64)
- Decima. Variant on 10 by 10 board where you win when you have 10 points on the 10th row. (10x10, Cells: 100)
- Decimaka. Game where pieces promote on making a capture.
- Decimaka (revised). Game where pieces promote on making a capture. (10x10)
- Decimal Quadruple Besiege. Army based on Échecs De L'Escalier arranged on enlarged Quadruple Besiege board. (20x20, Cells: 200)
- Delegating Chess. 84 square variant in which pieces delegate moving powers. (7x12, Cells: 84)
- The Demon Game. Missing description (10x10, Cells: 100)
- Dervish Chess. Large variant with a great variety of pieces. (11x11, Cells: 121)
- Desert Dust. Large variant with Arabian-themed pieces. (12x12, Cells: 144)
- Desert Oasis Chess. A large variant with 2 types of repeat jumpers, plus Knights, and Camels. (12x12, Cells: 144)
- Devingt Chess. Decimal chess with 20 pieces per side including Sages (moving as Camels).
- Diamond Chess 306. Missing description (22x24, Cells: 306)
- Diamond Ring Chess. Courier-style pieces to diamond-shaped camps on a toroidal wraparound board. (12x12, Cells: 144)
- Dimachaer Chess. Introducing the Dimachaer, a bifurcation piece that always lands on the diagonal second leg (zrf available).
- Directed Alice III. a 3-board Alice Chess variant.
- Divergent Chess. All pieces capture different than they move without capturing. (10x10, Cells: 100)
- Djambi. Four-player all-against-all game with unusual pieces; also known as Djambi.
- Do Sho Chess. Chess with Shogi pieces added. (14x8, Cells: 112)
- Donkey Chess. Grand Chess with Donkeys instead of Knights. (10x10, Cells: 100)
- Double chess. Two sets of pieces on 16 by 12 board. (16x12, Cells: 192)
- Double Chess. On 16 by 8 board. (16x8, Cells: 128)
- Double Cross Besiege. A spinoff from Besiege Chess using FIDE-size armies. (8x16, Cells: 96)
- Double Diamond. Irregular board with diagonal orientation. (9x9, Cells: 73)
- Double King Chess. With two kings on a 10 by 8 board. (10x8, Cells: 80)
- Double Move Double Chess. The game is played on a 8x16 chessboard with each player in control of two complete armies.
- Doublecannon Chess. Introducing the Doublecannon piece, a strong cannon relative with breathtaking tactical capabilities (Zillions file exists).
- Doublecannon-Chess (8x10). A big-board variant featuring the amazing new piece, the Doublecannon (Zillions file downloadable).
- DoubleEIGHTEEN-STONEchess. Combines Eight-Stone Chess with Double Chess. (16x9, Cells: 144)
- Doublewide Chess. A discussion of the variant where two complete chess sets (including two Kings per side) are set up on a doublewide board. (16x8, Cells: 128)
- Doubly Nested Chess. A variant hiding FIDE Chess on a Dabbaba binding. (17x17, Cells: 285)
- Dragon. Missing description (9x15, Cells: 135)
- Dragon Chess (tm). Commercial board game played on a large board with a new piece -- the Dragon.
- Dragonchess. Commercial large chess variant. (16x10, Cells: 124)
- A Dragonchess Page. Roberts Stevens' page on Dragonchess.
- Dragons, Archers, and Oxen. Chess variant on a 10 by 10 board. (10x10, Cells: 100)
- Drop Chess. Players can select from nine chess armies on an 8x8 or 9x9 board. (9x9, Cells: 81)
- Dual Chess. A more Chess-like variant featuring the Marshall and the Cardinal. (16x8, Cells: 100)
- The Duke of Rutland's Chess. Large variant from 18th century England. (14x10, Cells: 140)
- Dürer's Chess. Dürer's Chess, played on a board of 151 tessellating pentagons and diamonds. (Cells: 151)
- Échecs De L'Escalier. A double Capablanca-type variant with slightly enhanced Pawns. (10x10, Cells: 100)
- Echexs. Hexagonal variant for three or six players.
- Echidna Chess. Introducing the Echidna, a repulsion piece with telekinetic capacities (with zrf).
- Ecumenical Chess. Set of Variants incorporating Camels and Camel compound pieces. (8x10, Cells: 80)
- Edge of the World (EOTW) Chess. Pieces have momentum on 12 by 12 board. (12x12, Cells: 144)
- Eight-Stone Chess. On an 8 by 9 board with eight neutral stones. (8x9, Cells: 72)
- Elbow Room. Usual set of pieces and eight additional pawns per player on 8 by 16 board. (16x8, Cells: 128)
- Electrum Chess. All the Goldchess and Silverchess back-rank pieces in a single variant. (9x9, Cells: 81)
- Elephant Hecatomb. Similar to Hecatomb Chess. (9x8, Cells: 72)
- Elephant_Shogi. A Traditional Shogi game with Elephants added. (11x9, Cells: 64)
- Elven Chess. 10x10 variant with 4 new pieces, of which one can double-capture. (10x10, Cells: 100)
- Embassy Chess. A 10x8 variant based on Grand Chess. (10x8, Cells: 80)
- Emperor Chess. Large chess variant with a Commander (Queen + Knight), two Queens, and two Emperors (Bishop + Lame Dabbabah-rider) per side. (12x12, Cells: 144)
- The Emperor's Game. Variant on 10 by 10 board from 19th century Germany. (10x10, Cells: 100)
- Emperor's Nobility 3d Latrunculi (EN3dL). 3d variant in which pieces can get promoted again and again. (5x(5x10), Cells: 250)
- English Random Chess. Standard chessmen on a 10x10 board, with randomized piece setup. (10x10, Cells: 100)
- Enhanced Courier Chess. Courier Chess with the weaker pieces enhanced.
- Eric's Great chess. Modern variant on historic large chess variant. (10x8, Cells: 80)
- Essedar Chess. Introducing the Essedar, which captures orthogonally but moves by the collision method (zrf available).
- Euchess. Grand chess variant on 10 by 10 board. (10x10, Cells: 100)
- Eurasian Chess. Synthesis of European and Asian forms of Chess. (10x10, Cells: 100)
- Europan Chess. A 14x14 board with extra pieces. (14x14, Cells: 196)
- Evochess. Evolutionary chess. (12x12, Cells: 144)
- Excelsior. At certain moments in the game, pieces are moved to an additional 5 by 4 area. (2x(8x8), Cells: 84)
- ExCoCo Chess. EXtends and COmbines the COurier variants. (18x12, Cells: 216)
- Exhaustive Ashtaranga. Enough of every piece from Courier Ashtaranga to cover the board between them. (12x8, Cells: 96)
- Existentialist Chess. 10x10 board with many different pieces. (10x10, Cells: 100)
- Expanded Chess. An attempt at a logical expansion of Chess to a 10x10 board.
- Expanded Chess 256. The Chess experience upscaled to a larger board. (16x16, Cells: 256)
- Expanded Chinese Chess. Missing description (9x12, Cells: 108)
- Extreme 3D Chess Game. 8x8x8 3D Chess with linear, planar and cubic moves; and power absorption. (8x(8x8), Cells: 512)
- Falcon Chess. Game on an 8x10 board with a new piece: The Falcon. (10x8, Cells: 80)
- Falcon Chess 100. Falcon Chess played on an expanded board of a 100 squares with special Pawn rules. (12x10, Cells: 100)
- Falcon Random Chess. Missing description (10x10, Cells: 100)
- Fantastic XIII. A bizarre large odd chess variant with the weirdest men from Cazaux's family.
- Fantasy Grand Chess. Variant of Grand Chess with different armies and fantasy theme. (10x10, Cells: 100)
- Fantasy Grand Chess Army. Giant Army. (10x10, Cells: 100)
- Fantasy Grand Chess Army. Druid Army. (10x10, Cells: 100)
- Fantasy Grand Chess Army. Dwarven Army. (10x10, Cells: 100)
- Fantasy Grand Chess Army. Elven Army. (10x10, Cells: 100)
- Fantasy Grand Chess Army. Evil Horde Army. (10x10, Cells: 100)
- Fantasy Grand Chess Army. Human Army. (10x10, Cells: 100)
- FCC. Free Choice Chess -- Large variant where players choose and deploy their own forces.
- Feudal Chess. A 12x10 themed chess with variable armies. (12x10, Cells: 120)
- Fidchell. A large Great Chess variant with blended historical elements, invented for an RPG. (12x12, Cells: 144)
- Field Chess. On an 8x12 board with 8 extra pieces per side (Archers). (8x12, Cells: 96)
- Fimbriation Chess. Combines 4 players with 2-player Pawn treks and Castling. (14x14, Cells: 144)
- Flee!. Variant on 16 by 16 board with strong royal piece. (16x16, Cells: 256)
- Flight and Ferry. The gold dragon of Wessex fights the red one of Wales across the Bristol Channel. (8x10, Cells: 80)
- Flipworld. Pieces are on both sides of a disc. (2x(6x7), Cells: 84)
- Flying Bombers Grand Chess. The usual pieces in Chess are complimented by two Flying Bombers, which eliminate enemy pieces by flying over them! (10x10, Cells: 100)
- FOOD FIGHT!!!. Besides a Royal Chef, all the pieces are named after food items. (12x12, Cells: 144)
- Fool's Hexagonal Chess. designed to be a close (the closest?) hexagonal equivalent to orthodox chess. (Cells: 96)
- Foolish King Chess. Players have different armies and victory conditions. White has a fool for a king. (10x8, Cells: 80)
- Football Chess. A Football/Soccer game played with Chess pieces. (9x9, Cells: 81)
- fortress. Missing description (12x12, Cells: 144)
- Fortress chess. An old Russian variant for four players. (Cells: 192)
- Four Armies. Each player controls two armies. (10x10, Cells: 100)
- Four Double-Acts Chess. Specifically long- and shart-range versions of the Friend, Joker, and Orphan. (10x10, Cells: 100)
- Four-Fold Chess. Missing description (16x16, Cells: 256)
- Fragnurasian Qi. A two-River variant with the whole of two identical Wildeurasian Qi sets minus the second King. (13x15, Cells: 195)
- Franklin Grand Chess. On 10 by 10 board with combination pieces and random setup. (10x10, Cells: 100)
- Freakshow Chess. Missing description (9x8, Cells: 72)
- Free Chess. Dissociate movement-abilities from physical pieces. The opening setup is an empty board. (13x13, Cells: 156)
- Free Choice Chess. Free Choice Chess -- Large variant where players choose and deploy their own forces.
- A Friendly Game of Chess. Each side has Friends, and several odd pieces. Insanity ensues. (12x12, Cells: 144)
- Frog Chess with Gryphon and Falcon. Expansion for frog chess. (10x9, Cells: 90)
- Frog Chess with Manticore and Falcon. Expansion for frog chess. (10x9, Cells: 90)
- Full Double Chess. 32 pieces each, including all combinations of the basic Chess pieces, on a 16x8 square board. (16x8, Cells: 128)
- Furious Courier. Courier Chess with a Modern Queen and Crooked Bishops. (12x8, Cells: 96)
- Futashikana Shogi. Expanded version of Shosu Shogi played on an 11x11 board.
- Gala. Medieval game of German farmers. (10x10, Cells: 100)
- Gala (Farmer's Chess). Gala, a medieval cross between chess and tafl games. New rules reconstruction (with zrf).
- Gala Xiang-Qi. Crossover game. (16x16, Cells: 256)
- The Game of Three Generals. Each player has three generals, which command different sections of his army. (9x9, Cells: 81)
- Gamma2 Chess. Chess on a 10x8 board with Berolina Pawns & special Ship & Archer pieces. (10x8, Cells: 80)
- Ganeshan Chess. Introducing a new Elephant piece known as (the) Ganapati. (10x10, Cells: 100)
- Ganymede Chess. A 12x12 variant inspired by Ralph Betza's Chess on a really big board, Centennial Chess and Adrian King's Typhoon (among others). (12x12, Cells: 144)
- Gast's Chess. Large 1969 variant using the Cardinal (Guard) and the Chancellor (Archer). (12x12, Cells: 144)
- Gastrophete Chess. Introducing the Gastrophete, a catapult capable of hurling other pieces over its head (zrf exists).
- Gateway Chess. Pieces go a long way round to reach enemy territory. (8x10, Cells: 68)
- Gaul Chess. Introducing the Gaul, which captures like a bishop, but moves by the bifurcated jump method, on an H-board (zrf available).
- General and Arch-General Chess. Variations of Birds' Chess. (10x8, Cells: 80)
- Generals' Chess. Missing description (9x9, Cells: 81)
- Geometric sequence of Chess Games. Chess variants as large as you want.
- Gess. A Chess variant played on a Go board where pieces are collections of go stones. (18x18, Cells: 324)
- Gess on zillions game. Gess zillions rules.
- Ghostarelay. Game with ghost and relay, win if you have no legal moves. (10x10, Cells: 100)
- Giant Chess. 16x16 board with the same pieces as Turkish Chess, but also the "Dev" piece which takes up four squares. (16x16, Cells: 256)
- Giant-King Chess. Kings take up four squares each, all of which must be attacked to check. (10x10, Cells: 100)
- Gigachess. On 14 by 14 board with 20 different pieces. (14x14, Cells: 196)
- Gigachess II. Evolution of Gigachess (2001).
- 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)
- Gladiatrix Chess. Introducing the Gladiatrix, an extremely agile female gladiator, on an H-board (zrf available).
- Gleeman Chess. Missing description (9x9, Cells: 81)
- Go-Chess (tm) . Place your own pieces on a large board.
- goChess. goChess. (19x19)
- Gods on Pluto. Missing description
- Golden Age Chess On a Really Big Board. Variant on 16 by 16 board with several different pieces. (16x16, Cells: 256)
- Gomoku and Donkeys. Missing description
- Gorgona Chess. V. R. Parton's Gorgonia Chess (also Gorgon Chess), featuring the paralyzing Gorgonia (with zrf).
- Gothic Chess. A 10x8 variant using the same rules and equipment as Capablanca's Chess. (10x8, Cells: 80)
- Grand Apothecary Chess-Alert. Very large Board variant obtained trough tinkering with known games.
- Grand Apothecary Chess-Classic. Very large Board variant obtained trough tinkering with known games.
- Grand Apothecary Chess-Modern. Very large Board variant obtained trough tinkering with known games.
- Grand Cavalier Chess. The decimal version of Cavalier Chess. (10x10, Cells: 100)
- Grand Chess. Christian Freeling's popular large chess variant on 10 by 10 board. Rules and links. (10x10, Cells: 100) (Recognized!)
- Grand Chess Comments. Notes on Grand Chess and a variant. (10x10, Cells: 100)
- Grand CwDA: the Shatranjians. Grand CwDA. (10x10, Cells: 100)
- Grand Dice Chess. Grand Dice Chess Battle on a 12x12 board with four dice.
- Grand Ducal Chess. Missing description (12x8, Cells: 96)
- Grand hecatomb. Missing description (12x12, Cells: 144)
- Grand Hexachess. Large hexagonal chess variant. (Cells: 127)
- Grand House. Bughouse and CrazyHouse applied to Grand Chess. (2x(10x10), Cells: 200)
- Grand Shatranj. Grand Shatranj. (10x10, Cells: 100)
- Grand Shatranj N W. Shatranj with 10 individual pieces + pawns per army. (10x10, Cells: 100)
- Grand Tamerlane. John Davis invented this variation of Mideast Chess. (10x10, Cells: 100)
- Grand Triple Chess. Chess on an 16 x 24 board (i.e. six boards) with 3 sets of pieces. (24x16, Cells: 384)
- Grande Acedrex. A large variant from 13th century Europe. (12x12, Cells: 144)
- Grander Chess. A variant of Christian Freeling's Grand Chess. (10x10, Cells: 100)
- Grandkingdom Chess. A decimal variant with several powerful pieces. (10x10, Cells: 100)
- Granlem Shatranj. This is a mash-up of Grand Shatranj & Lemurian Shatranj with a 3 moves/player turn option.
- Grant Acedrex. Medieval large chess variant according to recent historians's work. (12x12, Cells: 144)
- GraTiA. A blend of two historic variants. (13x12, Cells: 156)
- Great Chess. An Indian/Turkish and very playable historic variant on a 10 by 10 board. (10x10, Cells: 100)
- Great Herd. Large variant with Camel, Zebra, Bison, Gnu and Gazelle pieces. (10x8, Cells: 80)
- Great Shatranj. Great Shatranj. (10x8, Cells: 80)
- Great Stour. Diagonal-heavy mixed-camp variant on Courier board with River. (12x8, Cells: 96)
- Great Whale Shogi. Great Whale Shogi by R. Wayne Schmittberger. (11x11, Cells: 121)
- Greg White's Chess Variants . Missing description
- Grenadier Chess. Introducing the Grenadier piece on an H-shaped board. A game for the attacking player. With zrf.
- Gridlock. Large, wargame inspired variant. (10x10, Cells: 100)
- Gross Chess. A big variant with a small learning curve. (12x12, Cells: 144)
- Grotesque Chess. A variant of Capablanca's Chess with no unprotected Pawns. (10x8, Cells: 80)
- Gryphon Aanca Chess. Large Variant with Gryphons, Aancas, and a few other not-so-common pieces. (12x12, Cells: 144)
- Guru Mahachaturanga. 2d India-specific offshoot of AOF series. (12x12, Cells: 144)
- Gustavian Cannon Chess. Featuring the remarkable Swedish Cannon on a Gustavian board, where it thrives (zrf available).
- Gutenschach. 3d variant using only planar pieces. (8x(8x8), Cells: 512)
- Hadean Chess. Expanded chess with short-range linear jumpers, augmented knights and zebras and more dynamic pawns. (12x12, Cells: 144)
- Hannibal Chess with Gryphon and Falcon. Expansion for hannibal chess. (10x9, Cells: 90)
- Hannibal Chess with Manticore and Falcon. Expansion for hannibal chess. (10x9, Cells: 90)
- Har Meggido Chess. Missing description (15x18, Cells: 270)
- Haynie's Great Chess. A decimal chess variant with Cardinals, Marshals Amazons, Nightriders Commoners, Firzans, Wazirs, Camels, And Zebras. (10x10, Cells: 100)
- Haynie's Oblong Chess 128. Variant on double size chess board. (16x8, Cells: 128)
- Heavy Chess. A high-density chess-variant-variant.
- Heavy Shako. 10x10 variant inspired by Yangsi, made by Eric Silverman and Jean-Louis Cazaux.
- Hectochess. 10x10 variant that can be played with 2 mismatched Chess sets.
- Heian-Dai Shogi. Early Great Shogi. (13x13, Cells: 169)
- Helmsman Chess. Introducing the Helmsman and the bounce-move, whereby the piece deviates orthogonally. A very positional piece (zrf available).
- Herb garden chess. Variant on 7 by 12 board with additional combination pieces. (12x7, Cells: 84)
- Herculean Chess. 12 x 12 version of chess featuring 4 Rooks, 4 Bishops, 4 Leapers and 22 pawns. (12x12, Cells: 144)
- Herichess. A variant on a board in the shape of the English Heritage logo. (14x14, Cells: 112)
- Heroes Hexagonal Chess version 2. Updated version of Heroes Hexagonal Chess in 91 hexes. (Cells: 91)
- Hex Besiege. Two slightly modified McCooey sets placed b(l)ack to b(l)ack. (11x21, Cells: 187)
- Hex Shogi 81. A hexagonal Shogi variant on an 81-space board. (9x9, Cells: 81)
- Hexa Decimal. Larger hexagonal chess variant. (11x11, Cells: 90)
- HexChess-Kirby's. Missing description (Cells: 313)
- Hexmate. A two-player variant on a hex board made up of 127, 3-color hexagons. (Cells: 127)
- Hia Chess. Smaller 9x8 variation of the Mongolian Hiashatar. (9x8, Cells: 72)
- Hiashatar . Mongolian Great Chess played on a 10x10 board with a pair of Bodyguard pieces per side.
- Hiashatar. A Mongolian historical variant, featuring the very special Bodyguard piece (zrf available).
- Hibernian Chess. Celtic Chess x Brannumh. (14x14, Cells: 196)
- Hishigata Shogi. Variation of Maka-Dai-Dai Shogi (ultra large Shogi). (19x19, Cells: 361)
- Holy Grail. To win, checkmate both the King and the Crown Prince but avoid the evil Mutating Serpent! (10x10, Cells: 104)
- Hoo Mitregi. Intermediate between Mitregi itself and Dai Mitregi. (12x12, Cells: 144)
- Hook Shogi. 16x16 variant with the hook movers from the largest Shogi variants. (16x16, Cells: 256)
- Hoplit Chess. Introducing the Hoplit, a very mobile modern relative of the Korean cannon, on an H-board (zrf available).
- Hoplomach Chess. Introducing the Hoplomach, a dynamic bifurcation cannon, related to the Korean cannon, on an H-board (zrf available).
- Horizons. Game with 5 new pieces on 12x12 board. (12x12, Cells: 144)
- Horn Rimmed Hex 1: 91 to 127. Start of hex analogue to the Mitred Framing series. (13x13, Cells: 127)
- Howitzer Chess. Introducing another piece named Howitzer, a fearful form of cannon, on the H-board. For the advanced tactician. With zrf.
- https://www.omnichess.club/variant/bc6b6876-dbdc-419c-bba4-3e462. Missing description
- Humpty Dumpty Chess. Cannon-using variant inspired by history of the character Humpty Dumpty. (12x8, Cells: 96)
- Hunterbeest. Large variant with one each of distinctive Nimrod pieces, and of similar set of oblique pieces. (11x10, Cells: 110)
- Hyperchess. A chess variant on a board representing 4-D space that closely parallels traditional Chess. (4x(), Cells: 256)
- Hyperchess4. Hyperchess updated: changed rules, discussion, sample game, etc.
- I-Chess. Large board variant that adds two more piece types: the wolf and the eagle.
- Idaidakama Shogi. Like Maka-Dai-Dai with drops and new pieces. (19x19, Cells: 361)
- Imperial Chess. Large variant with new pieces and victory by capture of royal pieces. (12x12, Cells: 144)
- In The Bin. Chess on a 9x9 board. Players select pieces from a bin. (9x9, Cells: 81)
- In-Yan. Missing description (10x10, Cells: 100)
- Infinite Chess. Chess on on infinite board.
- Infinite Chess. Extends Chess to larger, even infinite, boards. ()
- Influence Chess. Pieces on the top or bottom layer influence which chess pieces may move on the middle layer. (3x(4x7), Cells: 84)
- Insane Flip Relay Shatranj. Missing description (10x10, Cells: 100)
- Insane Ninja Chess. Big board chess with dual range Camel's Leap Ninja Guards, and Insane Ninjas: powerful multidirectional short-range leapers. (10x10, Cells: 104)
- Insect Chess. On a 12x12 board. All pieces are insect and arachnid representations, with some unique pieces. (12x12, Cells: 144)
- InterGrid Chess. Pieces on corners and on centers of squares of 8 by 8 board. (8x8, Cells: 145)
- Interloper Chess. Introducing the Interloper, a highly invulnerable attacking piece (with zrf).
- International Contemporary Random Chess. Missing description (10x10, Cells: 100)
- International Fischer Random Chess. Missing description (10x10, Cells: 100)
- Intrusive Squares. The board is split into 4 4x4 supersquares and reunited by 20 extra squares. (10x10, Cells: 84)
- Invasion. A military inspired Chess variant played on an 84-squares board. (10x10, Cells: 84)
- IO Chess. Variant on 16 by 16 board with many pieces. (16x16, Cells: 256)
- Irwell. Gain an advantage by crowning your enemy. (8x10, Cells: 80)
- J-Chess. Variant on 10 by 8 board with jesters. (10x8, Cells: 80)
- Jacks and Witches 84. Variant on 84 squares with special pieces and special squares. (12x8, Cells: 84)
- Jai-Alai. A sports theme variant with three new pieces: the Superball, the Ball and the Diagball. (9x8, Cells: 72)
- Jail Cell Chess. Large board with walls and jail cell areas. (14x20, Cells: 280)
- Janus Chess. Variant on 10 by 8 board. (10x8, Cells: 80) (Recognized!)
- Janus Kamil Chess. A crossover between Janus Chess and Modern Kamil Chess. (12x8, Cells: 96)
- Jester Chess. The Jester is an 'anon' piece but similar to the 'Fool' - beautiful commercial wooden sets - a must have!
- Jester Chess. Large variant, with four new pieces including Jester that imitates opponents last type of move. (10x11, Cells: 110)
- Jetan. Martian Chess.
- Jetan - Martian Chess. Large variant from the book The Chessmen of Mars. (10x10, Cells: 100)
- Jetan Jeddara. Large Jetan variant, with new pieces. (16x12, Cells: 192)
- Jetan, the game of. Extensive discussion of various versions of the rules of Jetan. (10x10, Cells: 100)
- Jetan-Sarang . A large variation of Jetan.
- Jikaida. A large variant, taken from A Sword for Kregen by Kenneth Bulmer. (12x18, Cells: 361)
- Joshua's Chess. Missing description (12x12, Cells: 144)
- Jumping Chess. Pieces capture by jumping. Board has extra edge squares making it 10x10. (10x10, Cells: 100)
- Jumping Knights Chess. Nightriders replace Knights and War Machines have also been added to Jumping Chess. (10x10, Cells: 100)
- Jupiter. Huge chess variant on 16 by 16 board. (16x16, Cells: 256)
- Jupiter (Revised). Missing description (16x16, Cells: 256)
- Kaissa . Decimal variant developed from descriptions in John Norman's Gor books.
- Kamikaze Mortal Shogi. Send your Kamikazes on suicide missions in this Shogi variant. (9x9, Cells: 81)
- Kangaroo Chess. Row of kangaroos behind the pawns behind the pawns. (10x10, Cells: 100)
- Keyles. Large variant with special king capture rule. Variant of Quex. (10x10, Cells: 100)
- King Arthur's Chess 72. Chess on a round board,. The odd number of files allows the Bishops to access every cell on the board - not colour-bound. (9x8, Cells: 72)
- King of the Hill. Be the first player to get your King to the top of the hill! (19x19)
- King's Court. Variant on 8 by 12 board with Chancellors and Jesters. (12x8, Cells: 96)
- Kings. A modest variant with more than one king. (8x8, Cells: 64)
- Kings castle. Crack the castle - Lancer to the front. (9x9, Cells: 81)
- Kings Court . Commercial chess variant on 12 by 8 board based on the historical Courier chess.
- Kingsmen. 9x9 board with two extra Bishops. Pieces gain the King's moveset upon reaching the last three ranks.
- Knavish Chess. Variant using square-board analogues to 6-way hex-board Dabbabas. (10x10, Cells: 100)
- Knight Mare. A large variant with several promotion levels. (11x11, Cells: 120)
- Knights Chess games. Missing description
- Korean Carrera. Missing description (15x10, Cells: 150)