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- Index N to Man and Beast. Alphabetic list of Man and Beast pieces starting with the letter N. By Charles Gilman.
- Index O to Man and Beast. Alphabetic list of Man and Beast pieces starting with the letters O and Q. By Charles Gilman.
- Index P to Man and Beast. Alphabetic list of Man and Beast pieces starting with the letter P. By Charles Gilman.
- Index R to Man and Beast. Alphabetic list of Man and Beast pieces starting with the letter R. By Charles Gilman.
- Index S 1 to Man and Beast. Alphabetic list of Man and Beast pieces starting with the letter S followed by A-I. By Charles Gilman.
- Index S 2 to Man and Beast. Alphabetic list of Man and Beast pieces starting with the letter S followed by K-Y. By Charles Gilman.
- Index T to Man and Beast. Alphabetic list of Man and Beast pieces starting with the letter T. By Charles Gilman.
- Index U to Man and Beast. Alphabetic list of Man and Beast pieces starting with the letters U and V. By Charles Gilman.
- Index W to Man and Beast. Alphabetic list of Man and Beast pieces starting with the letters W to Z. By Charles Gilman.
- Indistinguishable Chess. All pawns and pieces appear the same in color and size, for both sides. The board has no 'dark' squares. By Gary K. Gifford.
- Indistinguishable Chess. Player pieces indistinguishable from each other. Board squares are indistinguishable. (8x8, Cells: 64) By Gary K. Gifford.
- Infima. Missing description By Johnny Luken.
- Insane Ninja Chess . Featuring 2 pairs of powerful multi-directional leaping pieces capable of double capture. By Charles Daniel.
- Insane Ninja Chess. Play this exciting chess variant featuring two pairs of unique multi-mode pieces: Insane Ninjas and Mad Leaping Ninja Guards. By Charles Daniel.
- 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) By Charles Daniel.
- Insurrection. Capturing causes promotion, demotion, or a coup in the opponent's ranks. (8x8, Cells: 64) By Fogus.
- Interactive diagrams. Diagrams that interactively show piece moves. By H. G. Muller.
- International Contemporary Random Chess. Missing description (10x10, Cells: 100) By Jose Carrillo.
- International Fischer Random Chess. Missing description (10x10, Cells: 100) By Jose Carrillo.
- Irwell. Gain an advantage by crowning your enemy. (8x10, Cells: 80) By Charles Gilman.
- Iss Jetan. Missing description (10x10, Cells: 100) By Larry L. Smith.
- It's not a job for King. Two relatively modest games, playing with power and royality. (8x8, Cells: 64) By Daniil Frolov.
- Ito Shogi. Missing description (1x31, Cells: 21) By Jonathan H Rutherford.
- Ito Shogi . Missing description Author: Malcolm Webb. Inventor: Jonathan H Rutherford.
- Jail Cell Chess. Large board with walls and jail cell areas. (14x20, Cells: 280) By Nick Wolff.
- John Smith's Very Unofficial 47 Square Chess Variant Contest. Yes, just as the title says! I hope this is legal! By John Smith.
- Journalist's Chess. Journalist is movable to any position but no capture. (8x8, Cells: 64) By (zzo38) A. Black.
- Joust Chess. Rotating pieces, long range movement, adjacent capture, both in one turn using different directions. By Jeff Cornell.
- Jumping Knights Chess. Nightriders replace Knights and War Machines have also been added to Jumping Chess. By David Paulowich.
- Jumping Knights Chess. Nightriders replace Knights and War Machines have also been added to Jumping Chess. (10x10, Cells: 100) By David Paulowich.
- Kibitzing Vox Populi Chess variant. Rules for turning kibitzing into a game unto itself. By Rich Hutnik.
- King Friday XIII Chess. Flexible castling, promotion to opponent's pieces, etc. (8x8, Cells: 64) By (zzo38) A. Black.
- King of the Hill. Be the first player to get your King to the top of the hill! (19x19) By Paul E. Newton.
- King of the Ladder Tournament Rules. Ideas for rules to mix variants together in one game. (8x8, Cells: 64) By Rich Hutnik.
- King to Bunker Leap . Includes Shuffle Chess and pre-Chess with new “bunker leap” king safety rules. By Charles Daniel.
- King to Bunker Leap. King can jump over own pieces to reach 1 of 2 bunker positions in Shuffle Chess or Pre-Chess. (8x8, Cells: 64) By Charles Daniel.
- King to Bunker Leap. Play this exciting version of Pre-Chess using new king safety rules. By Charles Daniel.
- King's Guard Chess. Pawns move like kings and only Pawns may capture. (8x8, Cells: 64) By Graeme C Neatham.
- King's Guard Chess. Missing description By Graeme C Neatham.
- Kingdom of distorting mirrors. Missing description (2x(8x8), Cells: 128) By Daniil Frolov.
- Kings. Kings on the Game Courier. By Abdul-Rahman Sibahi.
- Kings. A modest variant with more than one king. (8x8, Cells: 64) By Abdul-Rahman Sibahi.
- Kira Chess/Kira Shogi. "Kira" and "L" pieces which is not known by your opponent. (8x8, Cells: 64) By (zzo38) A. Black.
- Knavish Chess. Variant using square-board analogues to 6-way hex-board Dabbabas. (10x10, Cells: 100) By Charles Gilman.
- Knavish Shatranj. Shatranj with Knaves and Debtors. (8x8, Cells: 64) By Jörg Knappen.
- Knight games (improved). Missing description By Namik Zade.
- Knight-Riding Chess. Missing description (8x8, Cells: 64) By John Smith.
- Knightless symmetric chess. Missing description (9x9, Cells: 81) By Claudio Martins Jaguaribe.
- Knights Chess games. Missing description By Namik Zade.
- Knights games . Missing description By Namik Zade.
- Knights of the Round Table. Missing description (8x8, Cells: 64) By Adam Goss.
- Koksal Karakus' En Passant Chess -. All pieces have the en passant option. Author: Jeremy Gabriel Good. Inventor: Köksal Karakus.
- Korean Carrera. Missing description (15x10, Cells: 150) By Daniil Frolov.
- Korean Random Chess. A Korean Chess variation with a random setup and a few new rules. (9x10, Cells: 90) By Jose Carrillo.
- Kozune Western . Missing description Author: Christine Bagley-Jones and Larry L. Smith. Inventor: Joshua Morris.
- L Shaped Chess. 2 player variant with some elements of 4-player ones. (7x7, Cells: 45) By Charles Gilman.
- Ladies and Generals. Missing description (6x(6x9), Cells: 324) By Charles Gilman.
- Landing force shogi. Missing description (9x9, Cells: 81) By Daniil Frolov.
- Latrumcolorum Chess. Piece caught between two opponent pieces is moved by him. (8x8, Cells: 64) By (zzo38) A. Black.
- Latrunculi duo milia et septum. Chess with rook/ferz & bishop/wazir substitutes for rooks and bishops. By Gary K. Gifford.
- Latrunculi XXI. A 21st century variant on an ancient Chess-like game of the Roman empire. (10x8, Cells: 80) By Jose Carrillo.
- Latte Chess. Alternative starting position, with each player having 4 rooks/bishops/knights, 1 king and queen, and 8 pawns. (8x8, Cells: 64) By Michael .
- LeaperChess. Variant of Capablanca Chess with two extra Knights per side replacing the Archbishop and Chancellor. By James Zuercher.
- Leapers Creeepers. Featuring compound long leapers of giraffes, zebras and camels. Author: Jeremy Gabriel Good. Inventor: Christine Bagley-Jones.
- Leapfrog Chess. The pawn can leap over any man in its initial two-step move (with zrf). By M Winther.
- Lemniscate Chess . Chess played on a Lemniscate board (in the shape of an infinity symbol). By David Cannon.
- Lemniscate Chess. Chess played on a Lemniscate board (in the shape of an infinity symbol). (18x4, Cells: 72) By David Cannon.
- Lengthleaper Hex Chess. The hex-prism geometry has surprisingly many equal-length compound leapers. (4x(6x9), Cells: 136) By Charles Gilman.
- Levitating Kings. Kings can levitate orthagonally or diagonally over a line of friendly pieces. (8x8, Cells: 64) By Gary K. Gifford.
- Lichess. Internet chess server featuring a few variants as well. Author: Ben M Reiniger.
- Lines of Relay (LoR). Chess variant featuring a new type of morphing piece, the Lore apprentice, on a standard board together with the standard pieces. (8x8, Cells: 64) By Jörg Knappen.
- Link to: Rainbowchess . Cards determine which pieces are placed on the board. Author: Hans L. Bodlaender. Inventor: Jozias Hillenkamp and Melchior Hillenkamp.
- Little River Chess. A 46 square variant based loosely on Chinese Chess. (6x9, Cells: 46) By Gary K. Gifford.
- Little River Chess. 46 Cell game with Chinese Chess influence. Kings confined to palaces. By Gary K. Gifford.
- Liu Yang. Hexagonal analogue to Yang Qi. (11x11, Cells: 91) By Charles Gilman.
- Locusts. Simple chess variant with only two set of pieces on each army. (12x12, Cells: 144) By Yu Ren Dong.
- Locusts . Simple chess variant with only two set of pieces on each army. By Yu Ren Dong.
- Login. Sign in to the Chess Variant Pages. Author: Fergus Duniho.
- Long Yang. Applying the Nearlydouble principle to a variant with Cannons. (11x16, Cells: 176) By Charles Gilman.
- Longshanks Chess. Missing description (12x12, Cells: 84) By Jonathan H Rutherford.
- Ludus Magus. Missing description (2x(8x8), Cells: 145) By Larry L. Smith.
- Ludus Magus . Missing description By Larry L. Smith.
- M!C Chess. All pieces but the king move and capture differently in a 10x10 board. By danielxdg.
- Macadamia Shogi. Pieces promote on capture to multi-capturing monsters. (13x13, Cells: 169) By H. G. Muller.
- Maces and Horse-apults. Chess with mace pieces and specialized catapults (horse-apults). (10x10, Cells: 100) By Gary K. Gifford.
- Maces and Horse-apults. Similar to chess, but on a 10 x 10 board and the addition of Maces and Horse-apults. By Gary K. Gifford.
- Maces, Horse-apults, and Tulpas. The game of Maces and Horse-apults with the likely use of tulpas pieces. (10x10, Cells: 100) By Gary K. Gifford.
- Maces, Horse-apults, and Tulpas. Maces and Horse-apults with user-created Tulpa pieces. By Gary K. Gifford.
- Maces, Shields, and Horse-apults. Like Maces and Horse-apults, but pawns are protected from Mace capture. By Gary K. Gifford.
- Maces, Shields, and Horse-apults. A varaiant of Maces and Horse-apults inwhich Maces cannot capture pawns. (10x10, Cells: 100) By Gary K. Gifford.
- Mad Elephant Shogi. Missing description (9x9, Cells: 81) By (zzo38) A. Black.
- Mad Queen Shogi. Play this new Chess/Shogi hybrid on Game Courier. Author: Fergus Duniho. Inventor: Larry L. Smith.
- Madness of Kings Chess. The Kings are, simply put, insane!! (8x8, Cells: 64) By Abdul-Rahman Sibahi.
- Magic River. Xiang Qi pieces crossing the Magic River turn into their Western counterparts, and vice versa! (17x9, Cells: 77) By John Smith.
- Magician's Chess. Pieces switch board sides with each move. (8x8, Cells: 64) By John Smith.
- Maha Chatukanga. Variant arranging Chaturanga's paired pieces and all their compounds in the style of Grand Chess. (10x10, Cells: 100) By Charles Gilman.
- Mamra Chess with Wuss. Variant combining very strong Mamra piece with weakening Wuss piece. By Jeremy Gabriel Good.
- Man and Beast 03: From Ungulates Outward. Systematic naming of the simplest Oblique Pieces. By Charles Gilman.
- Man and Beast 10: The Hybrid Diagonal. Systematic naming of straight coprime hex-prism-specific radial pieces. By Charles Gilman.
- Man and Beast 12: Alternative Fronts. Systematic naming of pieces using complex mixes of forward, backward, and same-rank moves. By Charles Gilman.
- Man and Beast 13: Straight and Crooked Moving. Systematic naming of part-straight and more complex non-straight pieces. By Charles Gilman.
- Man and Beast 14: Oddly Oblique. Systematic naming of hex-specific coprime oblique pieces. By Charles Gilman.
- Man and Beast 15: Strengthened Across the Board. Systematic naming of pieces reinterpreting the concept of directions. By Charles Gilman.
- Man and Beast 16: Diverging Further. Systematic naming of more complex divergent pieces. By Charles Gilman.
- Man and Beast 17: Hex Heavies. Systematic naming of non-coprime hex-specific pieces. By Charles Gilman.
- Man and Beast 18: Complex Pieces with Simple Ratios. Systematic naming of compounds of oblique pieces with SOLLs in ratios of 1, 1½, 2, 3, and 6. By Charles Gilman.
- Man and Beast 19: The Vice Squad. Systematic naming of more complex pieces mixing radial and oblique moves. By Charles Gilman.
- Man and Beast 20: Far From Square. Systematic naming of more complex hex-specific pieces. By Charles Gilman.
- Man and Beast 21: Lords High Everything-Else. Systematic naming of pieces that do not fit in any of the other articles. By Charles Gilman.
- Man and Beast Overview and Glossary. Table summarising what piece characteristics Man and Beast articles cover, with glossary of terms used to describe pieces. By Charles Gilman.
- Maorider Chess. Maorider and king with unusual recruiting abilities. (8x9, Cells: 72) By Vitya Makov.
- Maorider Chess. Missing description By Vitya Makov.
- Matrix Chess . Chess played on a board of tessellating pentagons and diamonds. By David Cannon.
- Matrix Chess. Chess played on a tessellation of pentagons and diamonds. The name comes from the matrix in which diamonds are found. (14x14, Cells: 196) By David Cannon.
- Matron Chess. Introducing the peculiar Matron queen, which makes regular chess more aggressive (zrf available). By M Winther.
- Maxim chess. Variant, invented by my little brother. (8x8, Cells: 64) By Daniil Frolov.
- Mega Doom Chess Project. Missing description By Claudio Martins Jaguaribe.
- Megastar of David. Enlarged version of Star of David 2 Level Hex Chess. (2x(), Cells: 182) By Charles Gilman.
- Meirav. Pieces are buried before they are captured, buried pieces may capture other buried pieces. (2x(8x8), Cells: 128) By כהן דותן.
- Metamachy . Zillions of Games file for Metamachy. (12x12, Cells: 144) By Jean-Louis Cazaux.
- Metamachy. Play this large variant with a variety of fairy pieces on Jocly. Author: Jean-Louis Cazaux and Michel Gutierrez. Inventor: Jean-Louis Cazaux.
- Metamachy. Play this large game with a variety of regular fairy pieces. Author: Fergus Duniho. Inventor: Jean-Louis Cazaux.
- Meteoric Chess. A sober but lively drop chess variant with standard pieces (zrf available). By M Winther.
- Midgard Chess. Midgard Chess has two unusual shortrange pieces, the War Elephant and the War Machine. (8x8, Cells: 64) By David Paulowich.
- Mighty Lion Chess. Orthodox Western Chess but with one knight replaced by Chu Shogi Lion. Author: Jeremy Gabriel Good. Inventor: H. G. Muller.
- Mighty-Lion Chess. Normal Chess augmented with a hard-to-trade Lion super-piece that can make double-captures. (8x8, Cells: 64) By H. G. Muller.
- Millinn3um (M3) Chess. varied opening positions for each player, two sets standard pieces per player, symmetrical piece drops, two kings each. By Michael Williams.
- Mimic Chess. Chess on a larger board with 3 new pieces with constantly changing movement capabilities. By Nick Wolff.
- Mimic Chess. Chess on a larger board with 3 new pieces with constantly changing movement capabilities. By Nick Wolff.
- Mimic Chess . Chess on a larger board with 3 new pieces with constantly changing movement capabilities. By Nick Wolff.
- Minesweeper chess. Missing description (8x8, Cells: 64) By Daniil Frolov.
- Mini Courier Chess Moderno. Missing description (10x8, Cells: 80) By Jose Carrillo.
- Mini four player chess. Missing description (8x8, Cells: 48) By Daniil Frolov.
- mini-Chieftain. One Small Multi-Move Game in Two Configurations. (8x8, Cells: 64) By Joe Joyce.
- Minima. johnnyluken. (6x6, Cells: 64) By Johnny Luken.
- Minixiang. Xiang Qi's short-range pieces come into their own on a small board. (5x6, Cells: 30) By Charles Gilman.
- MiniXiang. Missing description Author: Larry L. Smith. Inventor: Charles Gilman.
- mir chess II. a variant of mir chess with same piece strength. (8x8, Cells: 64) By Andy Maxson.
- Missing Ox Chess. 4 distinguishable FIDE sets represent pieces starting with 24 different letters. (16x16, Cells: 256) By Charles Gilman.
- Missionary cubic variants. Cubic-cell game with mixture of simple and compound forward-only pieces. (6x(6x8), Cells: 288) By Charles Gilman.
- MiTaWi. A variant combining elements on Mitregi, Taijitu Qi, and Wildeurasian Qi. (14x12, Cells: 64) By Charles Gilman.
- Mitred Framing 1: 8x8 to 10x10. Adding a rim of forward-only pieces around a FIDE-size board. (10x10, Cells: 100) By Charles Gilman.
- Mitred Framing 2: 9 files to 10x10. Puts most pieces of 9-file variants on FIDE board and adds extra rim including middle-file piece and Shogi-style extras. (10x10, Cells: 100) By Charles Gilman.
- Mitred Framing 3: 6x6 to 8x8. Adding a rim of forward-only pieces around a 6x6 board. (8x8, Cells: 64) By Charles Gilman.
- Mixed Radial Hex Chess. Hexagonal analogue to Nimrod Chess. (9x9, Cells: 61) By Charles Gilman.
- Modern Capablanca Random Chess. Missing description By Jose Carrillo.
- Modern Chess Principles. Missing description By Jose Carrillo.
- Modern drunk elephant shogi. Missing description By Daniil Frolov.
- Modern English Random Chess. Missing description (10x10, Cells: 100) By Jose Carrillo.
- Modern Makruk. A fusion of Modern Chess and Makruk. By John Smith.
- Modern Minister's Courier Chess. Missing description (11x8, Cells: 88) By Jose Carrillo.
- Modern Prime Ministers Random Chess. Missing description (9x8, Cells: 72) By Jose Carrillo.
- Modern Random Chess. Missing description (9x9, Cells: 81) By Jose Carrillo.
- Modern Random Chess. Missing description By Jose Carrillo.
- Monte Carlo Chess. Random movement variant. (8x8, Cells: 64) By Jeremy Gardiner.
- Move as square says. Game with identical piece, movement depends on location. (8x8, Cells: 64) By Daniil Frolov.
- MRC64. Missing description (8x8, Cells: 64) By Jose Carrillo.
- MRC64. Modern Random Chess 64. By Jose Carrillo.
- Multimove Chess. Players spend points to make multiple moves. (8x8, Cells: 64) By David Howe.
- Multiple Formations. A proposal to add a set of formations to Chess. (8x8, Cells: 64) By Rich Hutnik.
- Musketeer Chess. Adding 2 newly designed extra pieces. (8x8, Cells: 64) By Zied Haddad.
- Musketeer Chess. A game that adds extra pieces to Chess, playable online with Game Courier. Author: Fergus Duniho. Inventor: Zied Haddad.
- Mustang . Missing description By Namik Zade.
- Mustang Chess problem. Missing description By Namik Zade.
- Mutatis Mutandis. Astonishing variant featuring 22 different changelings at random setups. (8x8, Cells: 64) By Carlos Cetina.
- Mystery Chess. An imperfect information variant you can play online with Game Courier. Author: Fergus Duniho. Inventor: Ross Gillies.
- Narnia Chess . Chess, played on both the outside and inside of a social ball, with the Pentagons as "gateways" between the two. By David Cannon.
- Narnia Chess. Chess played on both the outside and inside of a soccer ball. (Cells: 52) By David Cannon.
- Naydorian Chess. an hexagonal variant from the fictional realm of Shadowgard. By Graeme C Neatham.
- Near Chess. This is a variant of Skirmish Chess designed to be friendlier to newbies. (8x8, Cells: 64) By Rich Hutnik.
- Nearlydouble Chess. A 2d variant with the whole of two identical sets minus the second King. (11x11, Cells: 121) By Charles Gilman.
- Nearlydouble Hex Chess. Applying the Nearlydouble principle to Wellisch and McCooey Chess. (15x15, Cells: 169) By Charles Gilman.
- Nearlydouble Wildebeest. A variant with the whole of two identical Wildebeest sets minus the second King. (15x14, Cells: 210) By Charles Gilman.
- Nearlytriple Raumschach. The logical extension of the Nearlydouble principle to Raumschach. (7x(7x7), Cells: 343) By Charles Gilman.
- Necromancer Chess. The Undead Walk. (8x8, Cells: 64) By Larry L. Smith.
- Neoclassical Chess. The opening moves are selected through a random ballot. By Gabriel F. Bobadilla.
- Neoteric Chess. Pieces are swapped before play begins. An external piece is introduced (with zrf). By M Winther.
- New Renniassance Chess. Faster Game with new pieces... Author: Jeremy Gabriel Good. Inventor: Eric V. Greenwood.
- Nietzsche Chess. That which does not capture a piece, makes it stronger. (8x8, Cells: 64) By Charles Gilman.
- Nimrod Chess. All the same moves as FIDE Chess, but not NECESSARILY on the same pieces. (8x8, Cells: 64) By Charles Gilman.
- Ninepiece Nichtschach. Combining 4 Linepiece Fusion with Nichtschach. (6x(6x6), Cells: 216) By Charles Gilman.
- Ninjutsu (Claustrophobia 2). Win by invading palace or checkmate; new leaping pieces promote to gain more power. By Charles Daniel.
- Ninjutsu (Claustrophobia 2). The fierce double capture leaping pieces: the Ninja Warriors and the Ninja Guards can promote to Insane Ninja Knights! (8x5, Cells: 46) By Charles Daniel.
- No Limit Bet Chess. A gambling multi-move chess variant played with dice that allows players to place bets on each move. (8x8, Cells: 64) By Charles Daniel.
- No-Yes! Chess. French commercial variant with an element of chance. By Luc Queyrel.
- Noble Wing Chess. Missing description (8x8, Cells: 64) By Mark Simpson.
- Noble WingS Chess. Missing description (8x8, Cells: 64) By Mark Simpson.
- Noli Me Tangere Chess. Missing description (10x10, Cells: 100) By Patrik Hedman.
- Noname Chess. Missing description By orian.
- Nonary Chess. King or queen are optionally swapped with a bishop before play begins (with zrf). By M Winther.
- Not Chess. Mixes elements of Chinese and FIDE Chess. By Jim Reynolds.
- Not-so colorbound cylindrical chess. Game only with pieces, that would be colorbound on normal board. (7x8, Cells: 56) By Daniil Frolov.
- Notake Shogi. All pieces stay on the Shogi board at all times. (9x9, Cells: 81) By Charles Gilman.
- Numeral Chess. Numeral Chess requires sharp eyes and promotes deep strategical calculation similar to Go (WeiQi). (17x17, Cells: 289) By Eric Truong.
- Nuthouse . Missing description By Yu Ren Dong.
- Nuthouse. Missing description (2x(8x8), Cells: 128) By Yu Ren Dong.
- Nutty Shogi. Smaller version of Tenjiku Shogi on a 13x13 board. Author: A. M. DeWitt. Inventor: H. G. Muller.
- Nutty Shogi. Pieces jump over many others, and a Fire Demon burns neighbors. (13x13, Cells: 169) By H. G. Muller.
- ObstructionChess. A new chess variant designed to challenge old strategies and improve your chess play with logical and organic obstructions. (8x8, Cells: 64) By martin rinab.
- Octogonal Chess. Carrera Chess on an octogon-shaped board. (10x10, Cells: 76) By John Smith.
- Octopus Chess . Featuring the Octopus, the Sorcerer Snake, the Ferz Knight, the Wazir Knight and the Ninja Pawns. By Charles Daniel.
- Octopus Chess. Features the crooked slider: the Octopus and the dual path Sorcerer Snake. (10x10, Cells: 100) By Charles Daniel.
- Octopus Chess. Featuring the Sorcerer Snake, the Ninja Pawn, the Wazir Knight, the Ferz Knight and the Octopus. By Charles Daniel.
- Omega Chess Extended . Missing description By Mykola Dolgalov.
- Omega Transplant. The Champion and Wizard from Omega Chess are transplanted to the board system and rules used for Birds and Ninjas. By Charles Daniel.
- Omega Transplant . The Warmachine Alfil , the Camel Ferz, the Ninja Pawns and the usual suspects battle it out on a new chessboard. By Charles Daniel.
- Once More, with Deans. Subvariants of River-with-university-and-cathedral series with extra piece type. By Charles Gilman.
- One King Shogi. Checkmate the neutral king. (9x9, Cells: 81) By Daniil Frolov.
- Onitama. Cards decide how pieces move, perfect information with no chance beyond setup. Author: Mikk . Inventor: Shimpei Sato.
- Open King 4*4DChess. Four dimensional game with 48 pieces. (4x(4x(4x4)), Cells: 256) By Kevin Pacey.
- Open King 5*4DChess. Four dimensional game with 74 pieces. (5x(5x(5x5)), Cells: 625) By Kevin Pacey.
- Option Chess. Missing description (8x8, Cells: 64) Author: (zzo38) A. Black. Inventor: Paul Bonham.
- Opulent Lemurian Shatranj. Joe Joyce's Shaman and Hero pieces are now on a larger board. (10x10, Cells: 100) By David Paulowich.
- Opulent Lemurian Shatranj. Joe Joyce's Shaman and Hero pieces are on a large board. By David Paulowich.
- Óskar's 3dchess. Missing description (5x(8x8), Cells: 320) By Hafsteinn Kjartansson.
- Óskar's 3dchess version 2. Missing description (5x(8x8), Cells: 320) By Hafsteinn Kjartansson.
- Overkill Chess. Paired pieces are compounds of 2 FIDE elements, King's partner of all three. (8x8, Cells: 64) By Charles Gilman.
- Overkill Ecumenical Chess. Compounds of 2, 3, and all 4 Wildebeest Chess elements. (9x10, Cells: 90) By Charles Gilman.
- Overyang. Variant using compounds of Yang Qi pieces. (11x13, Cells: 143) By Charles Gilman.
- Paco Shako. Pieces coexist peacefully on target square after capture. Author: H. G. Muller. Inventor: Felix Albers.
- Padwar qi. Missing description (9x10, Cells: 90) By Daniil Frolov.
- 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.
- Palace Ninja Guards. A pair of short-range diagonal leapers and four extra squares are added to the standard chessboard and pieces. By Charles Daniel.
- Panchimera. all the king's horses - a variant that doubles the number of each FIDE piece and then adds the knight augmented pieces. (11x12, Cells: 132) By Graeme C Neatham.
- Panchimera. 33 pieces a side, includes all the knight augmented pieces. By Graeme C Neatham.
- Panoply. A large hexagonal game with unusual pieces. By Daniel Zacharias.
- PantherChess. Variant of Capablanca Chess with two Panthers per side replacing the Archbishop and Chancellor. By James Zuercher.
- Partnership Chaturanga. Missing description (8x8, Cells: 64) By Jose Carrillo.
- Partnership Mitregi. Unthemed 4-player variant with most pieces always moving toward or across the River. (8x8, Cells: 64) By Charles Gilman.
- Passive ultima. Missing description (8x8, Cells: 64) By Daniil Frolov.
- Pawn Chess. Pawns promote to first piece captured by opponent. (8x8, Cells: 64) Author: (zzo38) A. Black.
- Pawn Eaters. Win by capturing 8 pawns. Uses Shamanic Rooks, Pawn Eaters, Old Y Mover Elephants, and traditional Knights. By Gary K. Gifford.
- Pawn Eaters. Win by capturing all your opponent's pawns. Game includes ancient Y-movers, Shaman Rooks, and Pawn-Eaters. (8x8, Cells: 64) By Gary K. Gifford.
- Pawn Vault Chess. johnnyluken. (8x8, Cells: 64) By Johnny Luken.
- Pawnier Chess. Missing description (11x9, Cells: 99) By Patrik Hedman.
- Pawns-to-Kings Chess. Missing description (8x8, Cells: 64) By Patrik Hedman.
- Peg Chess. A terrain-based chess variant. (8x8, Cells: 64) By John Smith.
- Pentagonal chess. Missing description (8x8, Cells: 64) By Daniil Frolov.
- PentaPlay. Chess on a board of regular Pentagons. By Graeme C Neatham.
- Penturanga. Chaturanga on a board with 46 pentagonal cells. (8x5, Cells: 46) By Graeme C Neatham.
- Penturanga . contains rule file and 2 piece sets. By Graeme C Neatham.
- Perier Chess. Introducing the Perier Cannon in a Western piece context (with zrf). By M Winther.
- Perleberger Bridge Chess. Missing description (8x9, Cells: 66) By Martin Janecke.
- Petteia XXI. A 21st century variant on an ancient Draughts-like game of the Roman empire. (8x8, Cells: 64) By Jose Carrillo.
- Phalanx Chess. Introducing the Phalanx pawn that can swap place with piece in front (with zrf). By M Winther.
- Pick the Piece Big Chess. Players can choose to play with Gryphon, anti-Gryphon, SuperCannon, Flying Bomber, Ninja Pawns and many other diverse pieces. By Charles Daniel.
- Pick the Piece Big Chess. In this customizable game, players decide on the pieces to fill two empty slots and those to be dropped during play. (10x10, Cells: 100) By Charles Daniel.
- Pick the Piece Big Chess . Massive collection of games featuring dual path Sorcerer Snake; crooked slider: Octopus and much more. By Charles Daniel.
- Pilgrim Chess. A new method of introducing an extra piece to the standard board (with zrf). By M Winther.
- Pillage. Features the powerful jumping Super Pawns as well as a twin set of Vaos and Cannons. (10x10, Cells: 100) By Charles Daniel.
- Pillage . Featuring the unique Super Pawn: a powerful short-range piece with promotional capabilities. By Charles Daniel.
- Pillage. Featuring the Super Pawn: a powerful short-range piece with promotional capabilities. By Charles Daniel.
- Pioneer Chess. A new method of introducing an external piece on the orthodox board (with zrf). By M Winther.
- Pioneers Chess. An elegant solution to draws in chess. (8x8, Cells: 64) By Luis Bolaños Mures.
- Pitcher Chess. Introducing the Pitcher pawn that can catapult posterior piece. By M Winther.
- Placement Chess. King and queen are swapped before play begins, generating FRC subset (with zrf). By M Winther.
- Placement Chess. King and queen are swapped with another piece, except rook, and creating a new mirrored position (with zrf). By M Winther.
- Placement Random Chess (Chess 20). The piece setup is randomized following Placement Chess rules, generating 20 modest Fischer Random positions. By M Winther.
- Plattraum. 2d variant which, like Raumschach in 3d, has three basic long-range pieces. (11x11, Cells: 91) By Charles Gilman.
- Plutonian Test Chess. Fictitious Variant for Testing Purposes. By Steven Streetman.
- Pocket Shogi Copper. A Variant of Shogi with Copper General and Pocket. By wdtr2.
- Pocket Shogi Plus. Shogi Like game with a pocket to store and move pieces. By wdtr2.
- PokerChess. PokerChess is a 2 player board game employing the mechanics of chess and poker. By Susannah Thorarinsson.
- Prime Ministers Chess. An adaptation of Gabriel Vicente Maura's 1968 Modern Chess. (9x8, Cells: 72) By Jose Carrillo.
- Prime Ministers Random Chess. Missing description (9x8, Cells: 72) By Jose Carrillo.
- Prime Ministers Random Chess. Missing description By Jose Carrillo.
- Prime.Ministers Contemporary Random Chess. Missing description (8x8, Cells: 64) By Jose Carrillo.
- Prison Break. Starring the sliding pawns, the Ninja Guards, the Knight, the Bird, the King and introducing the captivating Ice Queen! (6x8, Cells: 46) By Charles Daniel.
- Prison Break. Checkmate the enemy king or break out of prison with your king! By Charles Daniel.
- Promote King Chess. King can promote into Cthulhu, and white pawns can promote into black pawns. (8x8, Cells: 64) By (zzo38) A. Black.
- Proselyte Chess. Missing description (8x8, Cells: 64) By Larry L. Smith.
- Proto Prelates. An Armies of Faith offshoot adding Bishop compounds named after pre-Christian religious titles. (6x(10x10), Cells: 294) By Charles Gilman.
- Protomorphic-Chess. Start with only kings (and pawns), pieces change to different type after move. (8x8, Cells: 64) By (zzo38) A. Black.
- Provocator Chess. Introducing the Provocator, a zigzaging bifurcation piece, on a Gustavian board (zrf available). By M Winther.
- Pseudo-Modern Random Chess. Missing description By Jose Carrillo.
- Pyrrhus Chess. The Pyrrhus moves like a king but paralyzes enemy pieces at queen's distance (with zrf). By M Winther.
- Pyrrhus Chess. Introducing the terrible Pyrrhus that can paralyse enemy pieces with its gaze (with zrf). By M Winther.
- Qiube. Xiang Qi variant with Fortresses expanded from square to cube. (3x(9x10), Cells: 126) By Charles Gilman.
- Quake Chess. Quake Chess on the Game Courier. By Abdul-Rahman Sibahi.
- Quake Chess. Earthquakes over the board. (8x6, Cells: 46) By Abdul-Rahman Sibahi.
- Quantimex. Principles of Quantum Mechanics applied to Ultima on an hexagonal board. (Cells: 91) By Graeme C Neatham.
- Quapent. Missing description By Joe Watson.
- Quarter Chess. Missing description (8x8, Cells: 64) By Patrik Hedman.
- Quarterboard. Small variant with no pawns and piece drops, inspired by Chess and Shogi. By Milan Zeiske.
- Queen of the Night Chess. An over powered game on the Standard Board. By Abdul-Rahman Sibahi.
- Querquisite Chess. Features the whimsical, irregular Querquisites,. (8x10, Cells: 72) By Abdul-Rahman Sibahi.
- Querquisite Chess. The Whimsical Querquisite on the Game Courier. By Abdul-Rahman Sibahi.
- Random Move Number Chess. A die now controls the number of moves a player makes each turn. Luck and skill required to win! (8x8, Cells: 64) By Charles Daniel.
- Random Rodent Chess. Variant geneRATing rodent-named pieces marks Year of the Rat. (4x(9x9), Cells: 324) By Charles Gilman.
- Random Transposal Chess. Use dice to swap pieces. (8x8, Cells: 64) By John Smith.
- Random-Drop Chess . Missing description By Namik Zade.
- Rank and File Chess. Move from Most Crowded Row. (8x8, Cells: 64) By George William Duke.
- Raptor Chess. 104 square large board game with complimentary diagonal and orthogonal flying pieces each with dual mode capture abilities. (10x10, Cells: 104) By Charles Daniel.
- Raptor Chess . Two pairs of complimentary flying/leaping pieces: the Raptors and the Flying Bombers change the nature of the game. By Charles Daniel.
- Raptor Chess. Play game in which two pairs of dual mode fliers: the Raptors and the Birds create havoc on the board! By Charles Daniel.
- Raumherichess. Board shaped like 3d version of English Heritage logo. (5x(7x7), Cells: 140) By Charles Gilman.
- Recapturable Chess. Captured pieces belong to other player and then removed permanently. (8x8, Cells: 64) By (zzo38) A. Black.
- Red Fool Chess. Standard Chess, but with two extra rows and one semi autonomous piece, the Red Fool. By Amy Johnson.
- Redistribution 3d Chess. Relatively small 3d variant with short-range pieces including Pasha family. (4x(4x6), Cells: 96) By Charles Gilman.
- Reflection teammate. Missing description (8x8, Cells: 64) By Daniil Frolov.
- Reformed Chess. Pawn can swap with an enemy piece located on the last rank, except king. Thusly, many more won endgames (zrf available). By M Winther.
- Reformed Chess. Introducing a new pawn swapping capability intended to solve the problem of drawishness in chess (with zrf). By M Winther.
- Reformed Courier-Spiel. Begnis's attempt to reform the Courier-Spiel proposed by H.C. Albers in 1821. (12x8, Cells: 96) Author: Jean-Louis Cazaux. Inventor: Clément Begnis.
- Reformed Courierspiel. Play this modern version of an historic game on Jocly. Author: Michel Gutierrez and Jérôme Choain. Inventor: Clément Begnis.
- Regement Random Chess. Pieces are relocated to create a modest setup that most chessplayers will feel at home in (+ zrf). By M Winther.
- Regiment Chess. Black determines king position, white can swap the queen before play begins (with zrf). By M Winther.
- Relative Lumberjack. Pieces move the same as other pieces in its file. (8x8, Cells: 64) By John Smith.
- Relay Chess. Pieces inherit the ability of friendly pieces they are in the attack range of. (8x8, Cells: 64) By Johnny Luken.
- Relocation Chess. A remarkably easy method of rearranging the standard array of pieces (with zrf). By M Winther.
- Relocation Chess. Swap a pair of your own pieces before you begin. With Fischer Random castling rules. By M Winther.
- Rennaissance Chess II. Missing description By Matthew La Vallee.
- Retro Chess. A chess game progresses backwards from an empty board. (8x8, Cells: 64) By Mike Smolowitz.
- Revenge of the King. http://xn--perlebr-bxa.de/2010/02/Vergeltung-des-K%C3%B6nigs. (8x8, Cells: 64) By Martin Janecke.
- Reverse Symmetry. Missing description By Jose Carrillo.
- Revised Chess. The pawn can also capture forwards if positioned on 7th rank. Thus, many more won endgames (zrf included). By M Winther.
- Revised Chess. A revision of Fide-chess: a pawn on the seventh rank can also capture forwards. Makes chess much less drawish (with zrf). By M Winther.
- ' Roid Rage Chess. Missing description (8x8, Cells: 64) By Claudio Martins Jaguaribe.
- Rookheavy Chess and Bishopheavy Chess. combining elements of Lilliputian Chess, Isis, Mongolian Chess, and crooked linepieces. (8x8, Cells: 64) By Charles Gilman.
- Rose Chess. Grand Chess, with Roses instead of Knights. (10x10, Cells: 100) By Abdul-Rahman Sibahi.
- Rose Chess XII. With Nightriders, (Half-)Roses, Spotted Gryphons and War Machines. By David Paulowich.
- Rose Chess XII. With Nightriders, (Half-)Roses, Spotted Gryphons and War Machines. (12x12, Cells: 144) By David Paulowich.
- Rotating Cylinder Chess. Positions of pieces rotate one square to the right after each move. (8x8, Cells: 64) By John Smith.
- Rotor-blades Chess. Game played on a board that is both circular and trigonal. (Cells: 150) By David Cannon.
- Rotor-blades Chess . Played on a circular tessellation of 150 triangular cells. By David Cannon.
- Rotorblades Fusion Chess . A cross between my own Rotorblades Chess and Fergus Duniho's Assimilation Fusion Chess, with a few extra features. By David Cannon.
- Rotorblades Fusion Chess. Played on a circular tiling on triangular cells. A further development of my previous game, Rotorblades Chess. (Cells: 150) By David Cannon.
- Round Honeycomb Chess . Round Honeycomb Chess is a cross between Circular/Cylindrical Chess and Hexagonal Chess. By David Cannon.
- Round Honeycomb Chess. A cross between Circular/Cylindrical Chess and Hexagonal Chess. (9x11, Cells: 99) By David Cannon.
- Royal Rumble. A 6 board all-out melee with random pieces, royals and starting positions. By Nick Wolff.
- Royal Rumble. A 6 board all-out melee with random pieces, royals and starting positions. By Nick Wolff.
- Sac Chess. Play classical chess along with classical compound pieces: amazons, chancellors, archbishops... Author: Carlos Cetina. Inventor: Kevin Pacey.
- Sac Chess. Game with 60 pieces. (10x10, Cells: 100) By Kevin Pacey.
- Sai squad. A very experimental army for Chess with different armies, featuring the Sai (Bishop-Quintessence compound). (8x8, Cells: 64) By Jörg Knappen.
- Saint Pancras Shogi. double-set Sainted Shogi variant with half the pieces starting promoted. (11x12, Cells: 132) By Charles Gilman.
- Sanctuary . 46-cell game with elements from Xiang Qi. By Jeremy Pflasterer.
- Save the Standard . Zip file containing zrf and graphics for 7x7 and 13x13 home fields. By Graeme C Neatham.
- Save the Standard. Missing description By Graeme C Neatham.
- Schachen - Chess me. Commercial chess variant with board and pieces replaced by cards. Author: Hans L. Bodlaender. Inventor: Heinrich Gumpler and Matthias Schmitt.
- Scion . Missing description By Larry L. Smith.
- Scout Chess. Introducing the Scout, combining queen-captures with Camelrider moves (zrf exists). By M Winther.
- Secret Bombs Chess. Secret bombs with cards telling you where they are. (8x8, Cells: 64) By (zzo38) A. Black.
- Secutor Chess. The Secutor is a bifurcation piece that must collide and deviate in order to capture (+zrf). By M Winther.
- Seirawan Chess. It's Chess with the option to drop some additional pieces on the board. (8x8, Cells: 64) Author: Fergus Duniho. Inventor: Yasser Seirawan and Bruce Harper.
- Seirawan Chess. Play this variant with extra pieces to drop into the game. By M Winther.
- Seirawan Chess. Normal rules, except two extra pieces can be introduced: Hawk and Elephant (with zrf). By Stephen R. Stockman.
- Seirawan Chess. FIDE chess, put players have N+R and N+B in hand to drop. Inventor: Yasser Seirawan and Bruce Harper.
- SerPent Chess 50. Pentagonal cells form hexagonal blocks in two ways. (Cells: 50) By Charles Gilman.
- Seventeen Pawns. You can replace opponent's queen by nine pawns. (8x8, Cells: 64) By (zzo38) A. Black.
- sFhIoDgEi. A variant nesting two different smaller variants within it. (17x17, Cells: 289) By Charles Gilman.
- Sha'rah. Missing description (13x13, Cells: 169) By Patrik Hedman.
- Shambhala chess. Maybe, it's the misterious first form of chess? Actually, most probably, not. (8x8, Cells: 64) By Daniil Frolov.
- Shatar, Old 1 Hia. Old Shatar with one Hia. (8x8, Cells: 64) By Gary K. Gifford.
- Shatranj al-Sultan. Normal Chess + Alibaba , with a Sultanic flavour . (10x8, Cells: 80) By Abdul-Rahman Sibahi.
- Shatranj Kamil X. Shatranj Kamil, with new pieces from Jetan, Shogi and Xiangqi. (10x10, Cells: 100) By David Paulowich.
- Shatranj Kamil X. Shatranj Kamil, now with Chinese Cannons and Padwars (Jetan). By David Paulowich.
- Shatranj N W. catsmas. By Mark Simpson.
- 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.
- Shogchess. Missing description (9x11, Cells: 99) By Hafsteinn Kjartansson.
- Shogi 59. Shogi on half of a 9x12 board. (9x13, Cells: 59) By John Smith.
- Shogi WDA: Alquerque army. Experimental army, supposed to be played against standart Shogi army. (9x9, Cells: 81) By Daniil Frolov.
- Shogi with Cannons. Missing description (9x9, Cells: 81) By John Smith.
- Shogi-of-Chesstonia. 9 x 12 Shogi Variant that includes a Queen and some Modern Shatranj Pieces. (9x12, Cells: 108) By Gary K. Gifford.
- Shogi-of-Chesstonia. 9 x 12 Shogi Variant that includes a Queen and some Modern Shatranj Pieces. By Gary K. Gifford.
- Shogi-set Nearlydouble Variants. Variants using two Shogi sets, minus a second King aside, but with moves adjusted for a large board. (13x12, Cells: 156) By Charles Gilman.
- Shosu Shogi. 10x10 Shogi variant with Queens and more powerful promoted pieces. By A. M. DeWitt.
- Shosu Shogi. 10x10 Shogi variant with Queens and more powerful promoted pieces. By A. M. DeWitt.
- Side view chess. Missing description (8x8, Cells: 64) By Daniil Frolov.
- Siege. Missing description (10x8, Cells: 72) By Glenn Nicholls.
- Silver Elephant Chess. Missing description (10x8, Cells: 80) By Jose Carrillo.
- Simpleton's Chess. This is an even simplier version of Simplified Chess. (7x8, Cells: 56) By Rich Hutnik.
- Simpleton's Chess Preset. This is an even simplier version of Simplified Chess. By Rich Hutnik.
- Simplified Chess. Missing description (8x7, Cells: 56) By John Kipling Lewis.
- Simultaneous Chess. A variant of chess where players select moves at same time. (8x8, Cells: 64) By Rich Hutnik.
- Single Combat Chess. Missing description (8x8, Cells: 64) By Brett Ward.
- Sinojewish Chess. Hexagonal approximate analogue to Wildeurasian Qi. (13x13, Cells: 127) By Charles Gilman.
- Sirlin's Chess. Alternative presentation of "Chess 2 - The Sequel". (8x8, Cells: 64) Author: (zzo38) A. Black. Inventor: David Sirlin.
- Skidoo Chess. Pieces can "skidoo" into an interior board. (2x(8x8), Cells: 128) By John Smith.
- Skirmish56 Chess. This is Skirmish Chess on an Simplified Chess board. (7x8, Cells: 46) By Rich Hutnik.
- Small Game Nearlydoubles. Nearlydouble versions of Diana, Los Alamos, et cetera. (7x10, Cells: 70) By Charles Gilman.
- Smallest possible 2D and 3D chess. Missing description (2x(2x2), Cells: 4) By Daniil Frolov.
- Snowflake Xiang Qi. A better Xiang Hex. (Cells: 140) By John Smith.
- Solitaire dice chess. Solitaire dice chess (concept works with variants & board games of skill too). (8x8, Cells: 64) By Kevin Pacey.
- Solitary Patience Chess. Variant Chess Magazine vol 7, issue 56. (8x8, Cells: 64) By Stephane Burkhart.
- Sonic the Hedgehog Chess Advanced version. Missing description (8x8, Cells: 64) By Daniil Frolov.
- Sorcerer Chess. Big board chess featuring the Sorcerer (Zebra compund) and the Conjurer (Camel compound). By Charles Daniel.
- Sorcerer Chess. Practice the art of sorcery with two pairs of extra long leaping pieces: the Sorcerers and Conjurers. (10x10, Cells: 104) By Charles Daniel.
- Sovereign Chess. Ten neutral armies can be activated on this 16 x 16 board. (16x16, Cells: 256) By Mark Bates.
- SpaceWar. SpaceWar. By Joe Joyce.
- SpaceWar. SpaceWar rules. (16x12, Cells: 192) By Joe Joyce.
- Spartan Chess. Play this unequal armies variant on Jocly. Author: Michel Gutierrez and Jérôme Choain. Inventor: Steven Streetman.
- Spartan Chess. A game with unequal armies. (8x8, Cells: 64) By Steven Streetman.
- Spartan Chess. The spartan army with 2 Kings and novel pieces fights against the persians (standard chess army). By Nick Wolff.
- Spartan Chess 28 for Zillions . Zip file with Zillions rules file and graphics. By Graeme C Neatham.
- Spartan Skaki. Missing description (9x9, Cells: 81) By Larry L. Smith.
- Spherical Chinese Chess. XiangQi with a spherical board. (9x10, Cells: 92) By Graeme C Neatham.
- 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.
- Spire orth triangular xiang-qi. Missing description (7x14, Cells: 98) By Daniil Frolov.
- Springboard. Missing description By Glenn Nicholls.
- Square and hex on same board. Missing description (16x8, Cells: 128) By Daniil Frolov.
- SquireKnight. Squire Knight combines Knight and Forward/Backward Pawn like moves. (8x8, Cells: 64) By Stephane Burkhart.
- Squirrel Chess. Adapted from Squirrels and Camels Chess and reintroducing a unique old piece with zone of influence. By Vitya Makov.
- Squirrel Chess. Adapted from Squirrels and Camels Chess. (10x10, Cells: 100) By Vitya Makov.
- ST3DRoth. Charlie Roth's Revision of Star Trek 3D Chess. Author: Fergus Duniho. Inventor: Charles Roth and Andrew Bartmess.
- Stahlberg Chess. Regular pieces plus a Swedish Cannon and a Chancellor, which are dropped onto the board (with zrf). By M Winther.
- Stallmate Chess. Both players win or both players loose. (8x8, Cells: 64) By punkus martyrus.
- Star of David 2 Level Hex Chess. An AOF offshoot on two side-10 triangles opposite ways round. (2x(), Cells: 110) By Charles Gilman.
- Stealth Ninja Chess. Features a Drop Zone and diverse pieces such as Ninja Guards, Ninja Warriors, Stealth Gryphon, Anti-Gryphon, and Ninja Pawns. By Charles Daniel.
- Stealth Ninja Chess. Chess with two pairs of linear short-range leapers, and drop zone to add the Stealth Gryphon, Anti-Gryphon and Ninja Pawns. (10x10, Cells: 104) By Charles Daniel.
- Stealth Ninja Chess . Dynamic but balanced game with short-range leapers, and unusual sliding pieces: the Stealth Gryphon and Anti-Gryphon. By Charles Daniel.
- Stelliform 6 player Chess. Stellisch from Wellisch, Stellicorn from Revergent, and Stellgi and Hexgi. (17x17, Cells: 121) By Charles Gilman.
- Step and Circle TrigChess . contains rules file with 2 boards and 2 piece sets. By Graeme C Neatham.
- Step and Circle TrigChess. Presentation of a short example game. By Graeme C Neatham.
- Step and Circle TrigChess. Trigonal entry for the 45 or 46 cell 2007 design contest. (9x6, Cells: 46) By Graeme C Neatham.
- Stock Goes East 25 files. Stockschach-style analogues to Shogi, Xiang Qi, and offshoots. (5x(5x9), Cells: 225) By Charles Gilman.
- Stock Goes East 49 files. Stockschach-style analogues to Shogi, Xiang Qi, and offshoots. (7x(7x9), Cells: 441) By Charles Gilman.
- Stockschach. 3d game with "stock" 3d analogues to FIDE pieces. (6x(6x6), Cells: 216) By Charles Gilman.
- Stoltz Chess. Regular pieces plus a Swedish Cannon and an Archbishop, which are dropped onto the board (with zrf). By M Winther.
- StrategiChess II . Large, multi-player, mult-board variant with new piece types. (14x14, Cells: 196) By Alan Cartwright.
- Strong Yang. Another way of applying the Nearlydouble principle to a variant with Cannons. (13x13, Cells: 169) By Charles Gilman.
- Stylish victory or stylish fail. Missing description (8x8, Cells: 64) By Daniil Frolov.
- Submission Illustration - Plutonian Chess. Fictitious Variant for Testing Purposes. By Steven Streetman.
- SUCCHESS. Missing description (10x10, Cells: 100) By Djafer Medjahed.
- Suction Chess. Pieces swap places instead of being removed from the board, resulting in very different strategy. By Nathaniel Virgo.
- Suffix Index to Man and Beast. Alphabetic list of suffixes used in the Man and Beast series. By Charles Gilman.
- Suicide Chess. http://www.windowsphone.com/en-us/store/app/suicide-chess-free/b89dc1a3-2d23-410d-b580-aaaff54d81f5. By Freederick .
- Super Knights Chess 2. The Archbishop and Chancellor are complimented by a Ferz Knight, a Wazir Knight and Ninja Pawns. By Charles Daniel.
- Super Knights Grand Chess. Missing description (10x10, Cells: 100) By Charles Daniel.
- Super Knights Grand Chess . The original Super Knights with the Archbishop, Amazon, and Chancellor, as well as two more exciting and innovative games. By Charles Daniel.
- Super Knights Grand Chess. Two Chancellors, One Archbishop, no knights and Amazon among Bishops, Rooks... Author: Jeremy Gabriel Good. Inventor: Charles Daniel.
- Super-Chess. www.oteroideas.com. By Superuser .
- Super4*Chess (four dimensional chess). Four dimensional chess variant played with 96 pieces. (4x(4x(4x4)), Cells: 256) By Kevin Pacey.
- Swedish Cannon Chess. Introducing the Swedish Cannon, a cannon similar to the Korean, but well suitable for a Western piece context (zrf available). By M Winther.
- Swedish Hopper Chess. Features the Swedish Hopper. By Abdul-Rahman Sibahi.
- Switch-Side Chain-Chess. Optionally swap sides with your opponent upon completing a "chain". (8x8, Cells: 64) By Azlan Iqbal.
- Switchback Xiang Qi. Folding the Xiang Qi board into 3d has surprisingly little effect. (3x(3x10), Cells: 90) By Charles Gilman.
- 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.
- Tables Chess. Missing description (12x2, Cells: 24) By Adam Goss.
- Tactical chess. Missing description (8x8, Cells: 64) Author: Daniil Frolov. Inventor: Viktor Sopilko.
- TaflChess. A mix of FIDE chess and the old European game Tafl. (8x8, Cells: 64) By Rich Hutnik.
- TaflChess for Zillions. TalfChess on Zillions site. By Rich Hutnik.
- A Tale of Two Countries. This is a small diceless wargame. By Joe Joyce.
- Tandem-Pawn Chess. Pawns are tandems of two pawns, which can move or capture as a unit, or decouple into two pawns. (8x8, Cells: 64) By Kenneth Regan.
- Tango Chess. Using triangulators that move as bishops and different types of pawns that can be repositioned by side spacious wazirs. By Jeremy Gabriel Good.
- Tao's Chess. Chess variant where as you move across a line, the pieces reverse roles. By Travis Geyer.
- Team-Mate Chess. Variant with 8 different pieces, none of which is able to checkmate a bare king on its own. (8x8, Cells: 64) By H. G. Muller.
- Team-Mate Chess. Play this variant in which it takes a team to checkmate the King on Jocly. Author: H. G. Muller and Michel Gutierrez. Inventor: H. G. Muller.
- Terachess. Play this hexadecimal variant with 50% density on Jocly. Author: Jérôme Choain and Jean-Louis Cazaux. Inventor: Jean-Louis Cazaux.
- Terran Chess (Galactic Federation) . Chess from the 24th century? By Graeme C Neatham.
- Tetrahedral Shogi and Tetrahedral Hexgi. Shogi-based 3d variants on an enlargement of the Tetrahedral Chess board. (9x(9x9), Cells: 165) By Charles Gilman.
- Teutonic Knight"s Chess. Played on an oblong board with rarely used pieces: The teutonic knight, the archchancellor and the crown princess. (8x10, Cells: 80) By Jörg Knappen.
- TeX Chess . Chess program (including many variants) in TeX. By (zzo38) A. Black.
- Texarkana. Colorbound pieces have non-capturing, square-creating wazir move which they can use to switch to an alternate universe. By Jeremy Gabriel Good.
- Third runner. Missing description By Daniil Frolov.
- Third runner. Missing description (12x8, Cells: 96) By Daniil Frolov.
- 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.
- Three-Quarter Board. Missing description (8x8, Cells: 48) By Rafael Snell-Feikema.
- Throne Chess. Same game as chess, except playing King to K8 wins too, by Thronemate. By Kevin Pacey.
- Throne Chess. Same game as chess, except playing K to K8 wins by Thronemate, too. By Kevin Pacey.
- Through the Looking-Glass. Alice chess, but you see only a board. (2x(8x8), Cells: 64) By Paolo .
- Tiger Lily Chess. hexagonal chess on a board inspired by a flower. (6x12, Cells: 72) By Graeme C Neatham.
- TigerMarks. Missing description (8x8, Cells: 64) By Glenn Nicholls.
- TigerSquares - 80 & 100. Missing description (10x8, Cells: 80) By Glenn Nicholls.
- Tiraspol chess. Variant in which pieces capture as the piece whose starting file they're in. By Max K..
- Titan Chess. Chess featuring dozenal board and seven diverse new pieces with multiple capture mechanisms and movement modes. (12x12, Cells: 144) By Charles Daniel.
- Titan Chess. In which, a new class of pieces such as Quad Bomber, Flying Bomber, and Raptor possess a unique fly-over capturing mechanism. By Charles Daniel.
- Tonight. Superstrength double moving knight pieces and king that can create squares for itself to move in limited area. By Jeremy Gabriel Good.
- The Tower Game. A simple three dimensional chess variant. (8x(5x5), Cells: 200) Author: Abdul-Rahman Sibahi.
- Trade Chess. Captured pieces can be dropped, with restrictions. (8x8, Cells: 64) By Brady .
- Trampoline Chess. Each player has a Trampoline that allows friendly pieces to make a second move. (8x8, Cells: 64) By Mark Thompson.
- Trampoline Chess . Each player has a Trampoline that allows friendly pieces to make a second move. By Mark Thompson.
- Trapper Chess. Missing description (13x9, Cells: 117) By Patrik Hedman.
- Trappist-1. Chess game with no boundaries. includes Guard, Chancellor, Hawk, and Huygens. () By V. Reinhart.
- Trebuchet Chess. Introducing the Trebuchet, an active catapult piece that slings pieces over its head (zrf exists). By M Winther.
- Trebuqi. Hex variant using pieces selected for their similarity to Xiang Qi ones. (11x11, Cells: 91) By Charles Gilman.
- Triagonal Chess. 3D with triagonal moves and a hole in the middle. (8x(8x8), Cells: 504) By (zzo38) A. Black.
- Triana. 3-player version of 6x6 games. (9x9, Cells: 54) By Charles Gilman.
- Triangular xiang-qi. Missing description (9x9, Cells: 81) By Daniil Frolov.
- TriMac 3 Friends. Hexagonal Game of 3 Friends. (Cells: 207) By Graeme C Neatham.
- TriMac HexChess. Hexagonal XiangQi. (Cells: 135) By Graeme C Neatham.
- TriMac HexChess . Zillions Rule File and Graphics. By Graeme C Neatham.
- Trios Hex Chess. Filling Glinsky-size camps with extra pieces. (11x11, Cells: 91) By Charles Gilman.
- Trissa. A Rococo-inspired hexagonal variant for three players with an unusual flavor. (10x10, Cells: 55) By John Smith.
- Turkish Chess. The small version of Giant Chess. Author: Jeremy Gabriel Good. Inventor: Köksal Karakus.
- Turret Chess. The Turret catapult can sling any piece above its head, and let it land on an enemy piece (+ zrf). By M Winther.
- Twin Knights. Pairs of Knight-Ferzes, Knights and Knight-wazirs on small board with holes in it. By Jeremy Gabriel Good.
- Two Large Multi-Move Games. Two large multimove variants with multiplayer potential. (24x12, Cells: 288) By Joe Joyce.
- Two Ring Chess. Symmetric variant of "The Fellowship of the Ring". (8x8, Cells: 64) By (zzo38) A. Black.
- UC-170-13. Universal Chess version featuring 170 different kind of major pieces and 13 different kind of pawns. (8x8, Cells: 64) By Carlos Cetina.
- Unbland Chess. Diagonal moves are usually (but not always) prohibited. (8x8, Cells: 64) By (zzo38) A. Black.
- Universal Chess. Missing description (8x8, Cells: 64) By Carlos Cetina.
- Universal Chess. http://www.chessvariants.org/index/msdisplay.php?itemid=MSuniversalchess. By Carlos Cetina.
- Unknown Off-Pieces Shogi. Pieces placed from outside of the board are unknown to opponent. (9x9, Cells: 81) By (zzo38) A. Black.
- Upgrade chess. Upgrade initially weak pieces by capturing. (8x8, Cells: 64) By Daniil Frolov.
- Using chess sets to play mini-sukoku (6x6). Missing description (8x8, Cells: 64) By Karen Robinson.
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