I programmed these to show some of the many chess variants, rather than to be strong opponents. I could have added longer look-aheads, but this would have caused delays and taken up too much memory. Other chess applets exist and are also weak. Some of these applets recognize draw by repetition / perpetual check. Others fail to do so; again this is to save space and loading time.

The applet at André Heuner's Site is much stronger than mine. He also has some variants

I have tried to choose the ones that are actually popular with players. I welcome your suggestions. Green stars mark those that are very easy to learn and play casually.

I am presently looking for a Java programmer who can help me develop these into a site where people can play one another online. I expect to have access to an in-house server where I can run a Java server application sometime later this year.

There are also variants on checkers, including Byelorussian Cheskers. You can find these at other sites.

Taurus Gaming Premiere manufacturer of4-way chess mats

Click here for Three Player Chess, by my cyberfriend Maff. The invention of the "death piece" is his solution to the problem of players in a 3-person game tending to be passive.

Click here for Judtho, by a psychiatrist in training who has a new approach to cooperative-vs.-competition in four-player chess.

Easy Chess	Standard game
Absorption Chess	Capturer gains movement abilities
Absorption Chess II	Capturer gains movement abilities. This applet extends this to kings and pawns.
Abstract Chess	A friendly unit may donate some of its power to a neighbor.
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	Large variant with airplanes which capture by landing just beyond an enemy unit.
Akenhead's Chess	Chinese pieces and Berolina pawns.
Alapo	Simple chess-like game.
Alice Chess	Looking-glass boards. Extremely popular variant.
Alice Chess II	Players begin on opposite boards.
Alliance Chess	Two boards, four players, team wins by checkmating the primary player.
All-In Chess	Move either side's units. No reversing the previous move.
All-Mate Chess	Capture a piece only by rendering it unable to avoid FIDE capture.
Almost Chess	The queen may move as a knight or rook but not as a bishop.
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 are replaced by knights.
Ambi-Chess	Large board with two kings, move a member of each of two armies each turn.
Ambi-Chess II	As above, but you must escape check on the first of your two moves.
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-Check Chess	Your move must keep or restore your own king to conventional check.
Anti-Gravity Chess	A newly-moved unit repels the nearest unit along each orthogonal line.
Anti-King Chess	Your anti-king unit must remain under enemy attack. Berolina pawns an an unusual setup.
Anti-King Chess II	Your anti-king unit must remain under enemy attack. Usual setup plus anti-king.
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	Antipodeam move can queen a pawn.
Anywhere Chess	Units other than the king may make non-capturing moves to any square.
Variant I: Nearly Anywhere	I. May check only by a normal move
Variant II: Parachute Anywhere	II. May attack only by a normal move
Variant III: Hardly Anywhere	III. May attack or escape from check only by a normal move
Apocalypse 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.
Alternating Chess III	Each side alternates between moving pawn and piece. Pritchard says this may come from Argentina.
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.
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. Some say this makes a better game.
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.
Bachelor Chess 6x7	Original version on 6x7 board.
Balaklava Chess	All non-royal units can make non-capturing knight moves
Balbo Chess	Odd-shaped board, bishops as powerful as knights.
Bank of Scotland	Scotch Progressive Chess, with an extra move per turn for each time your side has checked the opponent.
Main Branch	Only a check ends a sequence early.
Modern Branch	A check or a move to a square under attack both end a sequence early.
Bankhouse Chess	Buy units back from the opponent, or bribe units you have captured to change sides.
Barasi Chess	Pieces cannot move backwards; pawns are Berolina
Bastardo	Four players, each playing alone, on an ordinary board
Bastardo Hallowe'en	Specter kings, death knights, plague pawns and bishops.
Bastardo for President	Royalty is assigned at random and kept secret
Dynamic Bastardo	Bastardo, load your initial setup
Objective Bastardo	Each player is given a different, distinct advantage.
Bastille Chess	Win by emptying opponent's castle.
Batak Chess	Indonesian culture where chess is very popular
Battle Chess	Move as many of your units as you like, once each, each turn. Win by capturing the enemy king.
Bear Chess	Russian variant with new piece
Beirut Chess	One unit is secretly carrying a bomb
Benedict Arnold Chess	No captures, but units attacked by the mover are flipped.
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. Win by getting your bishop to the end rank.
Black and White Chess	Two moves per turn, the first from a white square, the second from a black square.
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.
Black Hole Chess	Units falling into the central black hole may be recovered.
Blind Shogi	Japanese kriegspiel.
Blockade Chess	A unit may only capture one of its own kind. Popular at U. of Oslo.
Blood Brothers Chess	Pieces defend others of their kind regardless of location.
Blue Chess	Commemorates Deep Blue vs. Kasparov.
Blue Chip	A blue chip blocks the opponent's next move.
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 captured.
Bomber Chess III	Pawns and pieces can be made to explode.
Booster Pawn Chess	Pawns push friendly pieces.
Brickchucking Chess	Pieces can only move forward, but attack the king in any direction.
Brusky Hexagonal Chess	Hexagonal variant from the 1960's.
Brotherhood Chess	A piece cannot capture one of its own kind.
Buczo's Chess	10 x 10 variant with optional underpromotion
Bug Eyed Monster Chess	A non-royal unit may make any move which, in FIDE chess, some other unit could make and it could not make.
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.
Caissa	Christiaan Freeling's game with a royal queen.
Cambodian Chess	Historic 9x9 game.
Canadian Chess	Captured units are replaced immediately. Not really a Canadian regional game.
Canadian Chess II	Queens are replaced as rooks, rooks as bishops, etc. Pawns are not replaced.
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. The toughest odds given in chess.
Capricorn Chess	Rooks capture by moving adjacent to enemy units.
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	Proprietary game with board 10x10 and four suits of chess cards. Many different games are possible.
CardChess for Two	Faster than orthochess.
CardChess for Three	Survivor wins.
CardChess for Four	All-play-all.
Team CardChess	Four players, two teams.
Memory CardChess for Two	Faster than orthochess.
Memory CardChess for Three	Survivor wins.
Memory CardChess for Four	All-play-all.
Team Memory CardChess	Four players, two teams.
Non-Random CardChess for Two	Faster than orthochess.
Non-Random CardChess for Three	Survivor wins.
Non-Random CardChess for Four	All-play-all.
Team Non-Random CardChess	Four players, two teams.
Carnivore Chess	Each turn, also move an uncapturable predator.
Carrera Chess	10x8 version described in 1617
Cavalier Chess	All units except the queen enhanced knight-like.
Cavalry Chess	Enhanced moves for all pieces
Centaur Chess	Backwards moves only as knight
Center of Attention Chess	You also win by getting your king to one of the four central squares.
Centerless Chess	No center pawns or squares
Central Chess	Move twice per turn, once in center and once on edge
Chad	Christiaan Freeling's simple game of complex strategy.
Chameleon Chess	Begin with 16 pawns which evolve.
Chance Chess	Classic proprietary game. Randomizer determines what unit(s) 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 oldest form of chess. I have presented a modern version played in India in recent times.
Chaturanga for Four -- Machiavellian Version	Cutthroat new version.
Chazz	King and pawns
Cheapmate Chess	You may make one illegal move in order to checkmate.
Cheapo	Once during the game, you can move a unit twice
Checkers Chess	Pieces may not move backwards until they have visited the opposite side of the board.
Check Force Chess	The player giving check decides how the opponent escapes.
Checkless Chess	You may not check unless it is mate.
Chelma	Chess-Halma combination with no royal unit.
Chesapeake Four-Handed Chess	Based on Chessapeak Challenge, arguably the best commercial four-player chess game.
Cheshire Cat Chess	When a unit leaves a square, the square vanishes.
Cheshire Cat Chess, 10 x 10	When a unit leaves a square, the square vanishes.
Cheskers	The most popular cross between checkers and chess.
Chess Addresses	Place the enemy units, then return your own to their squares of origin.
Chess Draughts	Captures are mandatory; a unit which can continue capturing must do so on the same turn.
Chess in the Third Dimension	Three-D proprietary game from Skor-Mor.
Chess Merels	Lining up three units in a row captures the last enemy unit moved.
Chess with Reserves	Load your units during the game
ChessMate	Cards determine what units you may use.
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
Chex	Board is made of cards which must stay connected.
Chicken Chess	Losing Benedict Arnold chess.
Chimera Chess	Chimeras cannot capture or be captured, but swap positions with the enemy units which they displace
Chinese Chess (Xiangqi)	Number of players is probably comparable to FIDE chess players.
Chitty Chatty Chess	Four-handed game for beginners
Choiss	Build a board from tiles prior to placing units.
Church Chess	Seven bishops
Ciccolini's Chess	Large variant from the early 1800's
Cincinnati Four-Way Chess	Contemporary idea with relatively small central area
Circe Chess	Classic variant in which pieces are returned to their squares of origin if possible.
Circe Progressive Chess	The usual way in which Circe chess is played today.
Circe Vulcanici	Progressive Circe chess, units returning as in the standard non-progressive game, waiting if necessary until the square becomes open.
Circean Chess	Large variant in which pawns evolve into kings.
Circular Chess	Update of Byzantine Chess. At least one club is dedicated to this game.
Citadel	Early 1900's board game.
Citadel Chess	Classic variant of Shatranj.
Cleopatra Chess	No captures, but units attacked by the moving queen are flipped.
Clockwork Orange Chess	Units are returned unable to capture.
Coalition Chess	Alternative setup. No capturing across the midline.
Codrus Chess	Captures are mandatory. Win by forcing the opponent to capture your king.
Cohen's Error Chess	Columbia Cannon Chess, only with Korean style cannons.
Coin Chess	A coin on the board must mirror the moves of a unit, limiting the possibilities.
Colorbound Chess	Checkmate either king with a colorbound army.
Columbia Cannon Chess	Runners must leap one unit to move of capture; knight is 1,0 or 2,0 jumper.
Compact Chess	Small version popular in South Africa.
Confederation Chess	Pieces can merge and separate.
Congo	Successful game invented by a seven-year-old.
Connect Chess	Win by connecting opposite ranks with a chain of mutually supporting units.
Continuation Chess	A capturer may continue in the same direction for a maximum of two captures.
Contramatic Chess	You must not check the opposing king, or leave him in check. You may move into check.
Conversion Chess	I chose this one to represent the entire family of co-chess variants.
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 Rook Skirmish	Except for rooks, all units begin one square forward
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. Win by moving your king to an opposite corner.
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	Hexagonal variation commemorating 500 years of English chess publication.
Credo Chess for Three
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, then queen, then rooks, etc.
Crush Chess	After every 10 moves, the perimeter disappears.
Cuban Chess	Large version from Havana
Cursed Chess	Squares where you have slain an enemy become uncrossable
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 can see only the squares to which you could move.
Dark Chess II	As above, but you are protected from moving into, or remaining in, check.
Dead Square Chess	Captures destroy both units, the square, and all neighbors.
Decima	Win by occupying the back rank, with weaker units scoring more.
Decimal Four-Handed Chess	Fast-moving experimental partnership games by V. R. Parton.
Variant I	Five pawns each
Variant II	Pieces only
Variant III	Two pawns, omnidirectional
Variant IV	Same player cannot take both enemy kings
Defender Pawn Chess	Pawns can move (but not capture) any distance backwards
Defensive Chess	Red cannot move beyond fourth rank. White must checkmate within 50 moves.
Deployment Chess	Place units on markers which disappear if crossed by a friend or occupied by any unit. Won a variants contest.
Descent Chess	Start with king and center pawns. Add your other units when and where you choose.
Desertion Chess	After moving, units recruit adjacent enemies. Winner is the last player able to move.
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	Diamond-shaped board made up of triangles.
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. Win by capturing the enemy king.
Dice Chess V	If you cannot move the unit shown on the six-sided die, you lose. First five moves are as in orthochess.
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 Date Line
Double Chess	Move on either of two boards.
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	The object is simply to capture the other king.
Double Move Chess #2	Balanced Marsailles Chess. A check or mate ends your turn.
Double Move Chess #3	Bennekom Chess. On each move (except White's first), you move the same unit twice if you can. A check on the first move ends the turn.
Double Trouble Chess	White has only king and bishop but moves twice per turn.
Double Wide Chess	Two adjacent full chessboards.
Dragon Chess	Large version by Gary Gygax
Dragonfly Chess	Small version with pieces in hand.
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 their squares of origin.
Dutch Chess	Pawns start on the back ranks and move as queens
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.
Echexs	Hexagonal chess for three players.
Echos	Small variant in which you promote and demote your units.
Echo Chess I	If possible, make a second move with a matching unit in the same direction and distance as the first move. It may be a capture if and only if the first move was.
Echo Chess II	If possible, make a second move with a matching unit in the same direction and distance as the first move. The rule on capture is relaxed.
Eclipse Chess	Units in the eclipse zone cannot move or give check.
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 his forces and not the opponent's.
Emperor of China	Chess-Halma combination with royal king.
Endgame Chess	First pawn to promote becomes king.
English Progressive Chess	In each series, all mobile units must be moved before any unit may be moved again
Enjoyable Hour Chess	Three-Dimensional Chess
Enlarged and Improved Chess	Early large-board variant from Holland
En Passant Chess	All pieces can capture and be captured en passant
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
European Chess	Four different armies.
European Chess With Checks	Four different armies. This variant, unlike the tabletop version in which personal interactions and diplomacy are most of the fun, requires avoiding check when possible.
European Chess With Flags	In this variant of European Chess, there are no royal units, but each side has a flag which if carried to an opponent's corner wins for that opponent.
European Chess -- King of the Hill	In this variant of European Chess, there are no royal units, and one scores by keeping one's units in the center four squares. Ten points wins.
European Chess With Lightning	In this variant of European Chess, each time a unit is captured by conventional means, the identity of both armies changes.
Exchanger Chess	Knights can move to a square occupied by another friendly unit and exchange places with it.
Exotic Pieces	Menagerie of pieces, old and new. Have fun!
Explosion Chess	Whatever units the mover attacks disappear; if the mover is attacked, it also disappears.
Extended Queen's-Side Castling	Restrictions on queenside castling are relaxed.
Extinction Chess	Capture all of any kind of unit. Popular variant.
Falcon Chess	New version completes logical sequence of basic pieces
Fast Track Chess	Pawns may underpromote before they advance to the opposite rank.
Farmer's Chess	Medieval four-sided variant; "Four Seasons Chess"
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 Up Chess	Three-Dimensional 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 win by completing a row of five units composed from either side.
Five Tigers Chess	Variant of Chinese Chess. Red can make two pawn moves per turn but has no cannons, knights, or rooks.
Flip Chess	Thirty-eight square variant with the option to change the identity of the unit that was just moved.
Flip Shogi	Acclaimed variant; flip chess with units that may be dropped provided they give attack.
ForChess	Partnership game on a crowded 8x8 board
Foreign Policy Chess	Peacekeepers are a third army.
Fortresses	Odd shaped board.
Four Player Chess -- Standard	The Verney-Hughes implementation.
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 Way Two-Team Chess	Chess for four, with partners.
Four Way Free-For-All Chess	Chess for four, no partners.
Frankfurt Chess	Capturer becomes a unit of the type captured.
Freak Chess	Place your king into a random setup
Free Castling Chess	Liberalized rules on castling.
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.
Full Chess	Random symmetric starting positions. Different castling rules from Fischer's proposal.
Full House Chess	Load a second army before beginning.
Full House Chess II	Load a second army before beginning without attacking the opponent's KB2.
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. This time, royalty may cross a square under attack.
GalaChess	Hexagonal variation from 1980.
Gambler's Chess	Mover is determined randomly
German Rules c. 1420
Ghost Chess	The ghosts of captured units reappear.
Glory Chess	A pawn on the seventh rank checks.
Glinski's Hexagonal Chess	The most popular hexagonal variant.
Gothic Chess	Large version.
Grand Acedrex	Classic large board setup from medieval Spain.
Grand Chess	Considered among the best of the large-board setups.
Grand Crossing Chess	Win by getting your king to the opposite side.
Grasshopper Chess	Row of grasshoppers behind the pawns.
Grasshopper Chess II	The queen becomes a grasshopper.
Gravity Chess	Moved unit attracts
Gravitational Chess	Major units fall back toward the friendly side
Greater Chess	Large variant from the 1940's
Greek Progressive Chess	You may make one more move per turn than your opponent just did. Not really a Greek regional game.
Grid Chess	Moves and attacks must cross one of the grid lines. Popular variant.
Gridlock Chess	Two-move turns. If after the second move, there are three of your units in a 2x2 area, they are removed. Stalemated players lose.
Gryphon Chess	Units are promoted on each move.
Gryphon Chess II	Units are promoted on each move.
Guard Chess (Variant)	Units guarded by units, other than the king, are immune to attack.
Haigh's Chess	12 x 8 version.
Half Chess	4x8 board, plays well.
Handicap Chess	As in golf, stronger units are given relative limits on who they can capture.
Hawaiian Chess	Pacific Island variant
Hazlewood's Hexagonal Chess	Proprietary game from the 1980's.
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	A randomly-moving opponent moves more than once per turn.
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	The queen is replaced by the hero.
Hero Chess III	The hero may also move to any square attacked by a friendly non-hero.
Hexachess	Proprietary hexagonal variant
HexChess	Tony Paletta's hexagonal variant.
Hexes	Mike Loyfield's variant on a hexagon-based board.
Hexes Compressed	Another variant.
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.
Hopple-Popple Chess	Knights and bishops swap capturing moves.
Hostage Chess	To return one of your captured units, give back an enemy prisoner of equal or greater value. Very good game.
Howell's Chess	Enlarged board with open edge files.
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. You must escape from check on the first move of your turn.