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- Absorption Chess. Capturer gains movement abilities.
- Absorption Chess II. Capturer gains movement abilities. This applet extends this to kings and pawns.
- Abstract Chess. Pieces are represented by stacks of different heights.
- Accelerated Chess. Two non-capturing moves, or one capturing move, each turn.
- Active Chess. Two queens, 9x8.
- Actuated Rotating Center Chess. Center rotates, you choose when and how.
- Advance Chess. Pawns begin on third and sixth ranks.
- Airplane Chess. Airplanes move as queens any distance, capturing by landing just beyond an enemy unit.
- Akenhead's Chess. Chinese pieces and Berolina pawns.
- Alapo. Simplified game.
- Alice Chess. Looking-glass boards. Extremely popular variant.
- Alice Chess II. Alice Chess with armies starting on opposite boards.
- All-In Chess. You may move either side's units.
- All-Mate Chess. Capture a piece only by rendering it unable to avoid FIDE capture.
- Alliance Chess. Two boards, four players, team wins by checkmating the primary player.
- Almost Chess. The queen may move as a knight or rook but not as a bishop.
- Alternating Chess III. Each side alternates between moving pawn and piece.
- Alternation Chess. You alternate your moves with a partner.
- Amazon Chess. The queen may also move as a knight.
- Amazon Knights Chess. The queen may also move as a knight, and rooks and bishops.
- Ambi-Chess. Large board with two kings, move a member of each of two armies each turn.
- Ambi-Chess II. Missing description
- American Kriegspiel. With help of a referee, 2 players move w/o knowing the moves of the opponent, but know where P's can capture & what enemy fo.
- Angel Chess. 9x8 board. Angels (Q+N) are difficult to exchange.
- Annihilation I. Capture all non-royal units without checking the king.
- Annihilation II. Capture all enemy units except the uncapturable king.
- Anti-Gravity Chess. A newly-moved unit repels the nearest unit along each.
- Anti-King Chess I. Each player has both a King and an Anti-King to protect; Anti-Kings are in check when not attacked.
- Anti-King Chess II. Each player has both a King and an Anti-King to protect; Anti-Kings are in check when not attacked.
- Anti-Magnetic Chess. Like colors attract, opposites repel, along orthogonal lines.
- Anticipation Chess. Commit after moving to which kind of unit you will move next.
- Antipodean Chess. Captured units move, if possible, to the square four ranks and four files away.
- Antipodean Chess II. Captured units move, if possible, to the square four ranks and four files away. This can queen a pawn.
- Anywhere Chess. Missing description
- Apocalypse Mini-Chess. Miniature version with four horsemen.
- Archimedes Chess. Capture by attacking an enemy unit with two of yours.
- Arena Chess. Entry in the 32-move-maximum contest.
- Arktur Chess. Random first ranks, two kings.
- Arrow Pawn Chess. Pawns do not promote but have expanded moves.
- Assassin Chess. Shoot chess without royalty and with pawns that cannot be shot by line movers.
- Assassin Kriegspiel. Kriegspiel variant with unknown setups and special roles for knights and queen.
- Assault Chess. Play twice; which can win as White against a weakened Red faster?
- Atlantis Chess. You may sink an edge square instead of moving a unit.
- Atomic Pawn Chess. One time in ten, a pawn explodes just after moving.
- Avalanche Chess. Advance the opponent's pawns. Popular variant.
- Avalanche Chess 2. As before, except that the red king and queen are switched.
- Aviation Chess. Knight pawns move and capture as bishops and can leap any number of units.
- Bachelor Chess. All pieces promote. Win in the usual way or by joining king and queen.
- Balaklava Chess. All non-royal units can make non-capturing knight moves.
- Balbo's Chess. Odd-shaped board, bishops as powerful as knights.
- Bank of Scotland -- Main Branch. Progressive Variant where each check earns the player an extra move, and check ends turn.
- Bank of Scotland -- Modern Branch. Progressive Variant where each check gives a player another move, and move is ended by check or move to defended square.
- Bankhouse Chess. Missing description
- Barasi Chess. Pieces cannot move backwards; pawns are Berolina.
- Bastardo. Cut-throat four-player variant.
- Bastardo for President. Cut-throat four-player variant where one of your pieces is secretly President and thus royal.
- Bastardo Hallowe'en. Halloween-themed cut-throat four-player variant.
- Batak Chess. Indonesian culture where chess is very popular.
- Battle Chess. Move as many of your units as you like, once each, each turn.
- Bear Chess. Russian variant with new piece.
- Beirut Chess. One unit is secretly carrying a bomb.
- Benedict Chess. Instead of being captured, enemy pieces switch sides.
- Bennie Prince's Chess. Units not under attack may be removed and returned, one at a time.
- Berolina Chess. Pawns move diagonally and capture straight ahead.
- Berolina Grid Chess. Popular with NOST.
- Besiege Chess. Large variant with White on either side, Black in center.
- Bicapture Chess. You may capture, and be checked by, your own units.
- Big Board Chess. Large set with setup phase.
- Billiards Chess. Bishops and queens bounce off the edges.
- Bird's Chess. Large variant by the grandmaster.
- Bishop Chess. Bishops do not capture and cannot be captured.
- Black and White Chess. Two moves per turn, the first from a white square, the second.
- Black Hole Chess. Pieces moved to the center four squares of the board fall into your hand.
- Blackburne's Proposal. QR becomes a marshall, QB becomes a pegasus, and KB becomes a queen are enhanced.
- Blackjack Chess. If the point value of your remaining units totals 21, you win.
- Blind Shogi. Missing description
- Blockade Chess. Missing description
- Blood Brothers Chess. Pieces defend others of their kind regardless of location.
- Blue Chess. White and Black have additional, differing victory conditions.
- Bomb Chess. Queen's Rook moves as king and can explode.
- Bomber Chess I. Pawns can be made to explode.
- Bomber Chess II. Pawns can be made to explode, and always explode when.
- Bomber Chess III. Pawns and pieces can be made to explode.
- Booster Chess. Pawns push friendly pieces.
- Brickchucking Chess. Pieces can only move forward, but attack the king in any direction.
- Brotherhood Chess. A piece cannot capture one of its own kind.
- Brusky's Hexagonal Chess. Hexagonal variant from the 1960's.
- Buczo's Chess. Large board game with extra Knights and underpromotion available on 8th and 9th ranks.
- Bug Eyed Monster Chess. A non-royal unit may make any move which, in FIDE chess, some other.
- Bughouse Chess. Two boards. Units captured move to opposite board. Popular variant.
- Burmese Chess. Most popular form in Burma.
- Butters Chess. Capture by moving adjacent rather than by displacement.
- Byzanatine Chess. Circular 16x4 Shatranj variant.
- Byzanatine Chess II. A different account of the old circular game.
- Caïssa. Christian Freeling's game with a royal queen.
- Cambodian Chess. Historic 9x9 game.
- Canadian Chess. Captured units are replaced immediately.
- Canadian Chess II. Queens are replaced as rooks, rooks as bishops, etc. Pawns are not.
- Canadian Progressive Chess. Usually Canadian Chess is played progressively.
- Cannon Chess. Rooks and Bishops move and capture after the style of Chinese cannons.
- Capablanca Chess. 8x10 board variant by the grandmaster.
- Capablanca Chess 10x10. 10x10 board variant by the grandmaster.
- Capapranka Chess. A cap renders a square and any occupant non-functional.
- Capped Pawn Chess. White must checkmate with a move of the KBP or lose.
- Capricorn Chess. Missing description
- Capture the Flag Chess. As in the kids' tag game.
- Capturing Progressive Chess. Scotch Chess, but if no capture is made the count drops back to one.
- CardChess for Four. Utilizes the two key elements of card games: four suits and the ability to place cards face down to hide their values.
- CardChess for Teams. Utilizes the two key elements of card games: four suits and the ability to place cards face down to hide their values.
- CardChess for Three. Utilizes the two key elements of card games: four suits and the ability to place cards face down to hide their values.
- CardChess for Two. Utilizes the two key elements of card games: four suits and the ability to place cards face down to hide their values.
- Carnivore Chess. Each turn, also move an uncapturable predator.
- Carrera Chess. 10x8 version described in 1617.
- Cavalier Chess. All pieces except queens have some kind of knight-movement.
- Cavalry Chess. Enhanced moves for all pieces.
- Center of Attention Chess. In addition to regular rules, win by moving your King to a center square.
- Centerless Chess. No center pawns or squares.
- Central Chess. Move twice per turn, once in center and once on edge.
- Chad. Christian Freeling's simple game of complex strategy.
- Chameleon Chess. Begin with 16 pawns which evolve.
- Chance Chess. Randomizer determines what units you may move. Free move out of check.
- Chancellor Chess. Classic 9x9 board with rook-knight.
- Chaos Chess. Random starting positions.
- Chatty Chess. Four-handed game using normal board and pieces.
- Chaturanga. Oldest known form of chess.
- Chaturanga for Four. Ancient partnership game, sometimes said to be the.
- Chaturanga for Four -- Machiavellian Version. Cutthroat new version.
- Chazz. Only kings and pawns. Pawns can move backwards.
- Cheapmate Chess. You may make one illegal move in order to checkmate.
- Cheapo. Missing description
- Check Force Chess. The player giving check decides how the opponent escapes.
- Checkers Chess. Pieces may not move backwards until they have visited the.
- Checkless Chess. You may not check unless it is mate.
- Chelma. A cross between Chess and Halma.
- Cheshire Cat Chess. When a unit leaves a square, the square vanishes.
- Cheshire Cat Chess, 10 x 10. Missing description
- Cheskers. The most popular cross between checkers and chess.
- Chess Addresses. Missing description
- Chess Draughts. Missing description (8x8, Cells: 64)
- Chess in the Third Dimension. Three-D proprietary game from Skor-Mor.
- Chess Variant Applets. Ed Friedlander's Chess variants applet site.
- Chess with Reserves. Load your units during the game.
- Chess-Merels. Lining up three units in a row captures the last enemy unit moved.
- Chessapeak Four-Handed Chess. Based on Chessapeak Challenge, arguably the best commercial four-player chess game.
- Chessenat. Game from Columbia with custodial captures.
- Chessence. Units move and capture depending on their proximity to their colleagues.
- Chessers. Pieces may ride pawns to the end ranks.
- Chessgi. Captured units become yours to drop onto the board.
- Chessky. Dice rolls determine how the units move.
- ChessMatch. Chess variant with a hand of cards that allow movement.
- Chex. Cards with pieces form the board.
- Chimera Chess. Chimeras cannot capture or be captured, but swap positions with the enemy units.
- Chinese Chess (Xiangqi). Number of players is probably comparable to FIDE chess players.
- Chitty-Chatty Chess. Four-handed partnership game intended to introduce newcomers to Chess.
- Choiss. Starting with a 2x2 center, players assemble a 64 square board of any shape before play.
- Church Chess. Seven Bishops replace all backrow pieces other than the King.
- Ciccolini's Chess. Large variant from the early 1800's.
- Cincinnati Four-Way Chess. Four player chess variant from Cincinnati.
- Circe Chess. Classic variant in which pieces are returned to their squares of origin if possible.
- Circe Progressive Chess. Progressive variant where captured pieces return to their original square.
- Circe Progressive Chess. The usual way in which Circe chess is played today.
- Circe Vulcanici. Progressive Circe chess, units returning as in the non-progressive game, waiting if needed until the square becomes available.
- Circean Chess. Large variant in which pawns evolve into kings.
- Circular. Missing description
- Citadel. Missing description
- Citadel Chess. A variant of Shatranj, played on a ten by ten board with four extra citadels.
- Cleopatra Chess. No captures, but your Cleopatra (Queen) can seduce opposing pieces to your side.
- Clockwork Orange Chess. Captured pieces are replaced with non-capturing counterparts.
- Coalition. Missing description
- Codrus. Missing description
- Cohen's Error Chess. Columbia Cannon Chess, only with Korean style cannons.
- Coin. Missing description
- Colorbound. Missing description
- Columbia Cannon. Missing description
- Compact Chess. Small version popular in South Africa.
- Compromise Chess. If you have two legal moves, your opponent may.
- Confederation Chess. Two pieces can fuse into a stronger unit, and can dissociate.
- Congo. Animals fight on 7 by 7 board.
- Contramatic Chess. You must not check the opposing king, or leave him in check.
- Conversion Chess. I chose this one to represent the entire family of co-chess.
- Coregal Chess. King and Queen(s) are royal.
- Coregal Chess 2. King and Queen(s) are royal. Queens may not cross a square under attack.
- Corner Chess. Fast-paced variant without pawns.
- Corner Chess II. Tony Paletta's modern version of Farmer's Chess.
- Corner Rooks Skirmish. All pieces except the Rooks are pushed forward a rank.
- Coronation Chess. Bishop and rook can fuse to replace the queen.
- Corridor Chess. Setup by Tony Paletta.
- Counter Chess. Units may not capture those taller than they are.
- Courier Chess. Early German version.
- Crazyhouse Chess. One-board Bughouse.
- Creation Chess. Pieces on the far rank may give birth to hybrids.
- Creative Chess. Load your own units as you like.
- Credo Chess for Three. Hexagonal chess variant from St Albans, UK.
- Credo Hexagonal Chess ("Rose Chess"). Hexagonal chess variant from St Albans, UK.
- Cripple Chess. The king may move only to capture.
- Cross Chess. Popular in Australia.
- Crown Chess. Place your own units on the board, starting with the king,.
- Crown Prince Chess. Missing description
- Crush Chess. After every 10 moves, the perimeter disappears.
- Cuban Chess. 10x10 variant from Havana with Vampire Bats that move as King, Knight or Zebra.
- Cursed Chess. Squares where you have slain an enemy become uncrossable.
- Cutthroat ForChess. Four players, each playing alone, on an ordinary board.
- Cylinder Chess. First and eighth files connect.
- Dabbabante Chess. 2,0 runner need not stop for intervening units.
- Dark Chess. You have only limited information on where your opponents pieces are.
- Dark Chess II. You have only limited information on where your opponents pieces are.
- Dead Square Chess. Captures destroy both units, the square, and all neighbors.
- Decimal Four-Player Chess I. Checkmate either opposing teammate for the win.
- Decimal Four-Player Chess II. Checkmate either oppoenent for the win.
- Decimal Four-Player Chess III. Checkmate either opponent for the win.
- Decimal Four-Player Chess IV. Checkmate either opponent for the win.
- Defender Pawn Chess. Pawns can move (but not capture) any distance backwards.
- Defensive Chess. White king is not royal, and Red units (except king) cannot go beyond the midline. If White has not won by 50 moves, Red wins.
- Deployment Chess. Place units on markers which disappear if crossed by a friend.
- Desertion Chess. When you move next to opposing pieces, they desert to your side; win by converting or capturing all opposing pieces.
- Detente 007. You move three times in sequence, the middle one being an enemy unit.
- Diagonal Quadrant Chess. Different setup and pawn moves.
- Diamond Chess. Normal set and board, different setup and pawn moves.
- Diamond Chess II. Game on diamond-shaped board with 98 triangular cells.
- Diana Chess. Miniature chess game from the late 1800's.
- Dice Chess I. Move the unit indicated by the roll of a six-sided die.
- Dice Chess V. If you cannot move the unit shown on the six-sided die,.
- Discreet Kriegspiel. Kriegspiel with no information about pawn captures or checks; win by capturing the opposing king.
- Disguised King I. A secret royal pawn must be protected.
- Disguised King II. Win by capturing the secret royal pawn.
- Displaced Grid Chess. A Grid Chess variant that allows kings to visit corners, etc.
- Dodo Chess. Win by getting your king to the opposite side.
- Domination Chess. Win by occupying the center.
- Don't Cross Midnight. Chess on a rotating planet; units may not cross the International.
- Double Chess. Play two Orthochess games at the same time, moving in either each move.
- Double Knight Chess I. A second pair of knights replaces the bishops.
- Double Knight Chess II. A knight not capturing may move again at once.
- Double Move Chess #1. Move twice per turn, win by capture not checkmate.
- Double Move Chess #2. Move twice per turn, win by capture not checkmate, check or mate ends turn.
- Double Move Chess #3. Move twice per turn with the same piece.
- Double Trouble Chess. White has only king and bishop but moves twice per turn.
- DoubleWide Chess. Variant where two complete chess sets (including two Kings per side) are set up on a doublewide board.
- Dragonfly Chess. Small version with pieces in hand.
- The Duke of Rutland's Chess. 14x10 version.
- Dunsany's Chess. One side has 32 pawns instead of the usual pieces.
- Duo Chess. Two boards, units moving freely to the corresponding squares.
- Dutch Billiards Chess. Billiards chess with pocketed pieces returned to.
- Dutch Chess. Pawns start on the back ranks and move as queens.
- Dynamic Bastardo. Cut-throat four-player variant with free setup.
- Dynamo Chess. Units push and pull one another. Some bugs may remain in the program.
- Dynasty Chess. Capture both king and queen, whose moves vary.
- Earthquake Chess. Center of board runs down a fault.
- Easy Chess. Java applet the plays chess.
- Echexs. Hexagonal variant for three players.
- Echo Chess I. If possible, make a second move with a matching unit.
- Echo Chess II. If possible, make a second move with a matching unit.
- Echos. Transform your non-attacked, non-royal units as you like.
- Eclipse Chess. Units in the eclipse zone cannot move or give check.
- Ed Friedlander's Chess Variant Applets. Hundreds of Java Applets for Playing Chess Variants.
- Ed's Chess Applet. Missing description
- Edgehog Chess. Queens may move only to or from edges of the board.
- Eight Kings Chess. Checkmate any one of them to win.
- Emperor Chess. The king may move to, and only to, any square under attack by.
- Emperor of China. A cross between Chess and Halma.
- En Passant Chess. All pieces can capture and be captured en passant.
- English Progressive Chess. Missing description
- Enjoyable Hour Chess. Three-Dimensional Chess.
- Enlarged and Improved Chess. Early large-board variant from Holland.
- Entourage Chess. Any piece (not pawn) adjacent to the king is also royal.
- Epiphany Chess. Three Kings.
- Episcopal Chess. Capture both opposing bishops to win.
- Erosion Chess. Units erode after eight moves.
- Escalation Chess. Getting a unit captured lets you move twice on the next turn.
- Ethiopian Chess. African variant with distinct mobilization phase.
- Exchanger Chess. Knights can move to a square.
- Exotic Pieces. Menagerie of pieces, old and new. Have fun!
- Explosion Chess. Whatever units the mover attacks disappear; if the mover.
- Extended Queenside Castling. Orthochess, but Queenside castling is possible with a piece at d1 or b1, also called Madchess.
- Extinction Chess. Capture all of any kind of unit. Popular variant.
- Falcon Chess. Missing description
- Farmer's Chess. Medieval four-sided variant; "Four Seasons Chess".
- Fast Lane Chess. Pawns may underpromote before they advance to the opposite rank.
- Feint Chess. Seven of each side's units can check but not capture.
- Feudal Chess. Four player game on 9x9.
- Fianchetto Chess. Bishops and Rooks exchange starting squares.
- Fischer Random Chess. Random symmetric starting positions.
- Fish Chess I. Pawns can move backwards.
- Fish Chess II. Pawns can move and capture backwards.
- Fishaway Chess. Giveaway lumberjack chess.
- Five Star Chess I. You can also win by getting five of your own units in a new row.
- Five Star Chess II. You can also completing a row of five units.
- Five Tigers Chess. Variant of Chinese Chess. Red can make two pawn moves per turn but.
- Five Up Chess. Three-Dimensional Chess.
- Flip Chess. Missing description
- Flip Shogi. Missing description
- ForChess. Four player chess variant on 8 by 8 board.
- Foreign Policy Chess. Peacekeepers are a third army.
- Fortresses. Odd shaped board.
- Four Player Chess. One of many possible setups. Capture an opponent's king and control the remaining units.
- Four Player Chess III. Another popular setup for four players.
- Four-Handed Chess -- Standard. Four handed chess on plus-shaped board.
- Frankfurt Chess. Capturer becomes a unit of the type captured.
- Freak Chess. Bishops on starting square, other pieces start on random squares and place your King on your first turn.
- Free Castling Chess. Game using old liberal Italian castling rules.
- Free Placement Chess. Choose your own starting position.
- Free-For-All Chess. Move either side's units.
- French Revolution Chess. Short game with your pawns facing the enemy.
- Fuller's Proposal. Bishops can also move and capture as knights.
- Fusion Chess A. Pieces merge and separate.
- Fusion Chess B. Pieces merge and separate.
- Galachess. Hexagonal variation from 1980.
- Gambler's Chess. Mover is determined randomly.
- German Rules c. 1420. Missing description
- Ghost Chess. The ghosts of captured units reappear.
- Glinski's Hexagonal Chess. The most popular hexagonal variant.
- Glory Chess. A pawn on the seventh rank checks.
- Grand Chess. Considered among the best of the large-board setups.
- Grand Crossing Chess. Win by getting your king to the opposite side.
- Grande Acedrex. Java applet that plays Grande Acedrex.
- Grasshopper Chess. Row of grasshoppers behind the pawns.
- Grasshopper Chess II. The queen becomes a grasshopper.
- Gravitational Chess. Major units fall back toward the friendly side.
- Gravity Chess. Moved unit attracts.
- Greater Chess. Large variant from the 1940's.
- Greek Progressive. Make at most one move more than your opponent in his last turn.
- Grid Chess. Always move to a different 4 by 4 square part of the board.
- Gridlock. Missing description
- Gryphon Chess. Units are promoted on each move.
- Gryphon Chess II. Units are promoted on each move.
- Guard Chess. Guarded pieces cannot be captured.
- Haigh's Chess. Variant on a 8x12 board with doubled arrays.
- Half Chess. 4x8 board, plays well.
- Handicap Chess. As in golf, stronger units are given relative limits.
- Hardly Anywhere Chess. Pieces teleport anywhere without capturing, threatening, or escaping check.
- Hawaiian Chess. Pacific Island variant.
- Hazlewood's Hexagonal Chess. Hexagonal Chess on a diamond-shaped board with many short-moving pieces.
- Hecatomb Chess. One king and 31 queens on each side.
- Heraldic Chess I. Heraldic set plus sixteen cards per hand.
- Heraldic Chess II. Heraldic set plus ten cards per hand.
- Heraldic Chess III. Heraldic set plus six cards per hand.
- Heraldic Chess IV. Heraldic set plus two twelve-sided dice.
- Heraldic Extinction Chess. Win by capturing any piece plus its pawn.
- Hermit Chess. Play vs opponent making increasing numbers of random moves.
- Hero Chess. The king's pawn is replaced by a unit which mimics the move of any friendly unit on the board.
- Hero Chess II. Missing description
- Hero Chess III. Also called Superhero Chess.
- Hexachess. Hexagonal Chess with lots of Pawns on a peanut-shaped board.
- HexChess. Hexagonal Chess where Bishops move 1 hex in any direction and Rooks may not move to adjacent cell.
- Hexes Chess . Hexes Chess requires fewer chess pieces and a smaller board than conventional chess, but increases the mobility of each piece.
- Hexes Chess. Hexes Chess requires fewer chess pieces and a smaller board than conventional chess, but increases the mobility of each piece.
- Hexes Compressed Chess. Hexes Chess on a squared off, reduced size board.
- Hidden Target Chess I. Know which enemy species to eliminate to win, but not which one of yours is vulnerable.
- Hidden Target Chess II. Don't know which enemy species to eliminate to win, but do know which one of yours is vulnerable.
- Hidden Target Chess III. Double Blind.
- Home Base Chess. Captured units return to original squares if unoccupied.
- Hoppel-Poppel Chess. Bshops capture as Knights and Knights as Bishops.
- Hostage Chess. Pieces taken are held hostage and can be exchanged against other pieces and then dropped.
- Howell's Chess. The usual array and moves on a 10x10 board.
- Hunter-Falcon Chess. Two new kinds of runner are added only during the course of the game.
- Hurricane Chess. Move as many of your units as you like, once each, each turn.
- Hyperspace Chess. Units travelling more than 1 square go through hyperspace.
- Ice Age Chess. Blocks of ice cover the board at intervals.
- Identific Chess. Place undifferentiated units, then choose who they are after they.
- Idle King Chess. Kings do not appear on the board until the 13th turn, and can.
- Imitating Chess. Units move according to the FIDE move of the last enemy unit.
- Imitator Chess. A neutral piece must legally imitate your move. It may not capture.
- Immobilizer Chess. The immobilizer does not capture, but renders adjacent enemy.
- Imperial Chess I. Four-player game on circular board, also called Chez.
- Imperial Chess II. Standard array with extra Pawns on a round board.
- Imperial Chess III. Four-player all-against-all game on a cross-shaped board.
- Incognito Chess. In addition to the King, one Pawn is secretly royal.
- Indian Chess. Some local variant rules from the colonial period.
- Indian/Turkish Grand Chess. An Indian/Turkish and very playable historic variant on a 10 by 10 board.
- Insane. Units mutate randomly.
- Insane II. Units mutate randomly. This time, you know what the unit will become.
- Interregnum Chess. No king or queen; win by promoting a pawn; captured units replaced.
- Intrigue. Capturing a particular pawn places the enemy king on the board.
- Iron Guard. Non-capturable guard replaces White queen.
- Iron Knight. Non-capturable knight.
- Italian Miniature Chess. 5x5 game as played in Italy.
- Italian Miniature Losing Chess. 5x5 game as played in Italy.
- Italian Miniature Progressive Chess. 5x5 progressive game as played in Italy.
- Italian Progressive Chess. White moves once, black two times, white three times, etc. Check is only allowed at last move of series.
- Janus Chess. Large board variant.
- Japanese Chess. Missing description
- Joari-Joara. West Indian variant in which you may capture a guarded piece if and only if the move gives discovered check.
- Joust. Two knights. Squares cannot be revisited.
- Joyful Chess. One special square enhances a piece's powers, the other diminishes them.
- Juggernaut Chess. Unstoppable destructive unit moves at random.
- Junta Chess. The king and his knights are the junta.
- Kamikaze I. Capturing units are removed, except kings.
- Kamikaze II. Capturing units are removed, kings may not capture.
- Kamikaze III. If the lone queen checks, she wins.
- Kansas Progressive Chess. Missing description
- King and Pawns. White moves twice but has only king and pawns.
- King with a Shotgun Chess. Twice each game, the King can make a non-moving Rook capture.
- King with a Shotgun Chess II. Twice each game, the King can make a non-moving Queen capture.
- King's Corner Chess. Random setup with kings in opposite corners.
- King's Fortress Chess. Random setup with king's in opposite corners and extra pawns.
- Kinglet. Win by taking all the pawns of the opponent.
- Kingmaker Chess. The first pawn to reach the opposite rank promotes to the enemy king.
- Knight Odds Chess. White starts without the queen's knight.
- Knight Relay Chess. Knights confer their movement ability on units they defend. Popular variant.
- Knight Supreme Chess. Rooks and Bishops are replaced by Knights in the opening array.
- KnightMate Chess. The knight, not the kings, is royal.
- Knightrider Bouncy Chess. Diagonal runners bounce off the walls; knights are knightriders.
- Knightrider Bouncy Chess II. Pieces bounce off of walls, Knightriders can't capture each other.
- Knights Chess. Rooks, Bishops, and Queens can also move as knights.
- Konigsritter. Four-player game on curiously-shaped board with one player having a different army than the others.
- Korean Chess. The variant of chess played in Korea.
- Korkser Chess. Local rules in parts of Germany.
- Korkser Chess II. Same as Korkser Chess, but without initial double pawn moves.
- Kriegspiel. With help of a referee, two players move without knowing the moves of the opponent.
- Lambeth Conference. Bishops bounce off the walls.
- Las Vegas Fun Chess. Java applet for Vegas Fun Chess, a dice-based variant.
- Last Rook Chess. King and last remaining rook are both royal.
- Leandro's Chess. You can move any number of units one time each per turn, providing.
- Legan's Chess. Normal set and board, different setup and pawn moves.
- Leo Chess. The Queen is replaced by a Leo, which must leap over a screen to capture.
- Levantine Chess. One unit is immune to capture if it is not attacking.
- Lias's Proposal. Pawns may move, but not capture, one square sideways.
- Lion Chess. Queen, rook and bishops are cannons that must leap in order to capture.
- Loonybird. Pieces on a seven by seven board move differently when they take.
- Lord of the Rings Chess. Missing description
- Los Alamos Chess. Used for the first computer chess program.
- Losing Chess. Captures are mandatory, object is to be unable to move.
- Losing Chess II. Captures are mandatory, stalemate draws.
- Losing Chess III. Captures are mandatory; checkmating or having bare.
- Losing Chess IV. Captures are mandatory, being checkmated or having bare.
- Losing Sphinx Chess. Losing chess in four dimensions.
- Ludus Chessunculus. Game played on Hexagonal board with non-standard pieces.
- Lumberjack. Pieces move according to their current column.
- Machine Gun Chess. Attacked units are removed. The object is to remove.
- Mad Threeparty Chess. Chess for three. Each opponent has a king which you may check.
- Madcap Chess. If a capture is available, the player must capture,.
- Madrasi Chess. Units of opposite color and identical kind which attack one another cannot move.
- Maelstrom Chess. All 64 squares are initially occupied.
- Mafeking Kriegspiel. Players choose their own setups, unknown to opponent, units adjacent by Knights (spies) are visable.
- Mage Chess. Queen can swap with any friendly unit.
- Mage Chess II. Queen can swap with any friendly or enemy unit.
- Magic Carpet Chess. Each player has a magic carpet to move a non-King to any empty square on the board.
- Magna Carta Chess. Black has the FIDE array, White has a Marshal and an Archbishop instead of a Queen and King.
- Magnetic Chess. Moved unit attracts and repels.
- Maharaja and Sepoys I. Lone king, moving as queen+knight, versus an army.
- Maharaja and Sepoys II. Lone king, moving as queen+knight, versus an army. The maharaja.
- Manchurian Chess. Java applet for Yitong, a variant on Chinese Chess.
- March Hare Chess. Each side moves first a black unit, then a white unit.
- Martian Chess. Large variant from the book The Chessmen of Mars.
- Maya Chess. Indian variant in which a defended unit (not king or pawn) moves according to the defender(s).
- McCooey's Hexagonal Chess. Popular hexagonal variant.
- Meares's Proposal. Bishops can also move and capture one square orthogonally.
- Mecklenbeck Chess. Pawns promote on 6th rank.
- Mecklenbeck Chess. Missing description
- Medusa Chess. Non-capturing medusas petrify enemy units.
- Medusa Chess II. Non-capturing medusas petrify enemy units.
- Medusa Chess III. Medusas petrify enemy units they attack and capture as Queens.
- Melee Chess. Large variant, win by entering enemy castle.
- Memory CardChess for Four. Prior to each turn, turn over a card if it is available. If it is your unit, it is activated, otherwise, remember where it was.
- Memory CardChess for Three. Prior to each turn, turn over a card if it is available. If it is your unit, it is activated, otherwise, remember where is was.
- Memory CardChess for Two. Like regular CardChess, but cards are flipped face down when not moving.
- Mercenary Pawn Chess. Use either side's pawns to capture units.
- Mesmer Chess. Missing description
- Metamorphing Chess. Pieces upgrade when escaping, downgrade when capturing.
- Metamorpin'-Fusion A. Pieces are likely to proliferate.
- Metamorpin'-Fusion B. Pieces are likely to proliferate.
- Mexican Chess. Large variant from Mexico with 3,1 jumpers.
- Mexican King Chess. Win the usual way or by making it safely to Mexico.
- Michell's Proposal. Pawns may underpromote on next-to-last rank.
- Michelson's Chess. Each side moves first a red unit, then a white unit.
- Mideastern Chess. Actually a California variant resembling "Tamurlane" chess.
- Mimotaur Chess. Mimotaurs move as queens, may only capture a unit.
- Minefield Chess. Two of your squares have hidden mines that can destroy an enemy unit.
- Mini-Shogi. Missing description
- Miniature Chess. From an old Martin Gardner column in "Scientific American".
- Ministers Chess. Two queens on each side on a 9x9 board, available commercially.
- Missile Chess. Each unit can rifle-capture once.
- Mock Chess. No royal piece, mandatory captures.
- Modern Chess. Latin American 9x9 version.
- Monarch Hexagonal Chess. Proprietary hexagonal variant.
- Mongolian Chess. Shatar, the major form of chess played in Mongolia for centuries.
- Mongredian Chess. Both bishops on queenside, both knights on kingside.
- Monkey Do Chess. If possible, make a second move with any unit.
- Monochrome Chess. All units are of the same color. Win by accumulating captures.
- Monster Chess. White's normal army faces Red's king and four pawns; Red moves twice per turn.
- Morley's Chess. Large board with the usual pieces.
- Moroccan Chess. If you have one or more captures, you must make a capture.
- Moscow King Chess. Board starts empty.
- Mountain King Chess. First king to reach the center square of an 11 x 11 board wins.
- Mrs. Graycheck's Chess. Pawns promote only to a unit already captured.
- Ms. Alice Chess. Alice Chess played on one board.
- Mutation Chess. Units other than kings transform into whatever they capture. Queens do not move to give check.
- Mysore Chess. Large variant by an 18th century Indian king.
- Narrowness Chess. Many pawns.
- Nearly Anywhere Chess. Pieces teleport anywhere without capturing or checking.
- Nemesis Chess. Missing description
- NeoChess. For four players on an 8x10 board.
- NeoSchaak. Load your own units, onto the first two ranks, as you like during the game.
- Neutral King Chess. Missing description
- New York Twins Chess I. Large board with two kings. Checkmate either one.
- New York Twins Chess II. Large board with two kings. Capture one, then checkmate the other.
- Nine Riders Chess. Each piece is a rider.
- Ninny Chess. Classic board game.
- No Entry Chess. Bar the opponent's access to one square after each of your moves.
- Non-Prise Chess. Only kings and pawns can capture queens, rooks, bishops, or knights.
- Non-Random CardChess for Four. Cardchess with predetermined locations for card pieces.
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