Inventors Starting with S

Ismael Santos [info] Assault&Siege. Missing description (8x8, Cells: 64)
Ernst Saperow [info] Toroidal Byzantine Chess. Circular chess modified to also be toroidal. (Cells: 64)
Ola Sassersson [info] SASR chess symbols. Minimalistic graphics for chess and variants.
Shimpei Sato [info] Onitama. Cards decide how pieces move, perfect information with no chance beyond setup.
Lukas A. Saul [info] SphereChess . Downloadable files to play a spherical chess variant.
John Savard [info] John Savard's Three-Dimensional Chess. Missing description Leaping/Missing Bat Chess. Large variant on a 16x12 board with many fairy pieces. (16x12, Cells: 192)
Stephen G. Sava [info] New-Chess. Variant on 10 by 10 board with combination pieces. (10x10, Cells: 100)
Prashant Hindurao Sawant [info] Super-Chess. On a 12x12 board with slightly more powerful pawns and knights. Armies start back-to-back. (12x12, Cells: 144)
Kevin Scanlon [info] Grander Chess. A variant of Christian Freeling's Grand Chess. (10x10, Cells: 100)
Reinhard Scharnagl [info] Capablanca Random Chess. Randomized setup for Capablanca chess. (10x8, Cells: 80) Capablanca Random Chess. Randomized setup for Capablanca chess.
Erez Schatz [info] Attendance Chess. 10 piece types that can move to 10 squares each, mostly. (10x10, Cells: 100) Duel Chess. Captured pieces are sent to a separate Duel board to see who is eliminated and who returns. (2x(5x7), Cells: 43) Infantry Chess. Small chess variant with short range pieces. (9x9, Cells: 43) , more...
Karl Scherer [info] Black Hole Chess. Pieces moved to the center four squares of the board fall into your hand. Hermit Chess. Play vs opponent making increasing numbers of random moves. Magic Carpet Chess. Each player has a magic carpet to move a non-King to any empty square on the board., more...
Michael Schmahl [info] Summoner's Chess. Pieces are created and improved through the use of cards. (8x8, Cells: 64) Summoner's Chess. Pieces are created and improved through the use of cards.
J. R. Schmidt [info] Webball. Board that can be visualized as globe shaped spider web, based on dodecahedron.
William C. Schmidt [info] Knight Mare. A large variant with several promotion levels. (11x11, Cells: 120)
R. Wayne Schmittberger [info] Les . La victoire s'obtient en capturant toutes les pi (French Language) Extinction chess. Win by making your opponents pieces of one type extinct. (8x8, Cells: 64) (Recognized!) Great Whale Shogi. Great Whale Shogi by R. Wayne Schmittberger. (11x11, Cells: 121) , more...
Matthias Schmitt [info] Schachen - Chess me. Commercial chess variant with board and pieces replaced by cards.
Mike Schneider [info] Diamondback Chess. Pieces start in corners. (8x8, Cells: 64)
Werner Schoendorf [info] Janus Chess. Variant on 10 by 8 board. (10x8, Cells: 80) (Recognized!) Janus Chess. Large board variant. Janus Chess. Play this variant with two extra pieces that move as a Bishop or Knight on Jocly., more...
Alfred Schönfelder [info] Big Board Chess. On a 10 by 10 board with individual opening setup. (10x10, Cells: 100) Big Board Chess. Large set with setup phase. Big Board Chess. Play Big Board Chess online with Game Courier.
Herbert Schuetzdeller [info] Zebulon. German commercial game with bluffing with chess pieces and connection forming. (7x7)
Ralph Schuler [info] Record Chess. Try to reach a position in as little moves as possible.
Sydney Schultz [info] Threatened Pawn Chess. Pawns start in threatened positions. (8x8, Cells: 64) Threatened Pawn Chess. Pawns start in threatened positions.
Karl Schulz [info] Joyful Chess. One special square enhances a piece's powers, the other diminishes them.
Juan Pablo Schweitzer Kirsinger [info] Hanga Roa. A chess variant inspired by the people of Easter Island. (9x9, Cells: 81) Hanga Roa en Espa. Missing description Hanga Roa. Play Hanga Roa on Game Courier!, more...
Uli Schwekendiek [info] ChessXp. 10x10 Chess, strictly derived from the 8x8 architecture.
W. B. Seabrook [info] Rifle Chess. Pieces are taken by shooting: capturing without moving. (8x8, Cells: 64) Rifle Chess. Units capture without moving. Rifle Chess. Take a move to capture an enemy piece without moving the capturing piece., more...
Matt Seabury [info] Treyshah. A commercial three-player hexagonal variant with 23 pieces a side. (Cells: 210)
Donald Seagraves [info] Behemoth Chess. Chess with a randomly moving, uncapturable Behemoth piece that can capture multiple pieces in a turn.
Douglas Yale Kaplan Seiden-Sacharovich [info] Force Field Chess. Missing description (8x8, Cells: 64)
Yasser Seirawan [info] Seirawan Chess. invented by GM Yasser Seirawan, a conservative drop chess (zrf available). Seirawan Chess. FIDE chess, put players have N+R and N+B in hand to drop. Seirawan Chess. It's Chess with the option to drop some additional pieces on the board. (8x8, Cells: 64)
Henry J. Self [info] Self's three-handed chess. 19th century chess variant for three players. (Cells: 144)
Jeff Shaffer [info] Kaissa . Decimal variant developed from descriptions in John Norman's Gor books.
Isaak Grigorevich Shafran [info] Shafran's Hexagonal Chess. Hexagonal variant from the early Soviet Union. Shafran's Hexagonal Chess. A classic hexagonal variant from Russia. Shafran's Hexagonal Chess. Play this Hexagonal variant from the Soviet Union on Jocly., more...
Greg Shanker [info] Deception Chess. Each piece has two identities, Cloak and concealed Base.
Jason Shields [info] Emulation Chess. Pieces have no move of their own, but move instead like adjacent pieces of either side. (8x8, Cells: 64) Nuclear Chess. When pieces take, the square becomes impassable and all surrounding pieces disappear. (8x8, Cells: 64) Warp Point Chess. Knights are replaced by Warp Points that other pieces can move between. (8x8, Cells: 64) , more...
Robert Shimmin [info] Giant-King Chess. Kings take up four squares each, all of which must be attacked to check. (10x10, Cells: 100) Sacrifice chess. Instead of a normal move, you may sacrifice a pawn. (8x8, Cells: 64) Scheherazade. Pieces may combine with other pieces to form combination pieces. (10x10, Cells: 100) , more...
David Short [info] Les . Missing description Black Hole Chess. Variant on board with 100 squares with hole in middle of board, combination pieces and hiding squares for kings. (9x11, Cells: 100) Cannons and Crabs. A variant on a 7x6 board with Crabs (improved Pawns), and Cannons (leapers). (7x6, Cells: 42) , more...
Abdul-Rahman Sibahi [info] Battery Chess. Chess on a Battery shaped board, with lots of batteries. (5x10, Cells: 46) CGNP chess. A game with Knightly Pawns. (8x8, Cells: 64) Chess with a Fool. Missing description (8x8, Cells: 64) , more...
Jorge Nuno Silva [info] Endgame. Players start out with 16 pawns and gain pieces via promotion. (8x8, Cells: 64)
David Silverman [info] Mini Chess 4x4. Play this miniature Chess variant on Jocly.
Eric Silverman [info] Heavy Shako. 10x10 variant inspired by Yangsi, made by Eric Silverman and Jean-Louis Cazaux. Kuuzen Dai Shogi. Dai Shogi with different promotions, invented by Eric Silverman. (15x15, Cells: 225) Obento Chess. 12x12 Chess variant with Shogi-style promotions and bent sliding pieces. (12x12, Cells: 144)
Charles G. Simms III [info] Link to: W.A.R.P.S. . Chess variant on round board with new pieces.
Mark Simpson [info] Grand Shatranj N W. Shatranj with 10 individual pieces + pawns per army. (10x10, Cells: 100) Noble Wing Chess. Missing description (8x8, Cells: 64) Noble WingS Chess. Missing description (8x8, Cells: 64) , more...
Grant Sinclair [info] High Chess. Drawn games are instead won by the player whose King is closest to the centre. Muster Chess. Each player can muster different armies. (8x8, Cells: 64)
David Sirlin [info] Chess 2. Different armies, a new winning condition, and duels. (8x8, Cells: 64) Sirlin's Chess. Alternative presentation of "Chess 2 - The Sequel". (8x8, Cells: 64)
Sergey Sirotkin [info] Beau Monde Chess. Large variant where pieces move with variations of the Queen move. (11x10, Cells: 100) Big Chess. Chess variant on a 14 by 8 square board with extra Pawns, Knights and Bishops. (14x8, Cells: 112) Building Chess. Variant that starts with a board of 25 squares, but each player adds a square after their move. (8x8, Cells: 64) , more...
E. Slater [info] Chess with Reserves. Load your units during the game.
Piotr Smagacz [info] Companion chess. The Queen may have a companion. (8x8, Cells: 64) Lively chess. Fast development is the basis in chess. (8x8, Cells: 64) Placement Chess960. chess960 with piece placement by players and orthodox castling. (8x8, Cells: 64) , more...
Andrew L Smith [info] 12 Augmenters Chess. Each piece's movement capabilities is increased by ~4 squares. The Custom Crushers. A 'build it yourself' Chess with Different Armies army inspired by the Corps from 12 Augmenters Chess. (8x8, Cells: 64) The Marvellous Megafauna. A diverse Chess with Different Armies faction with riders and leapers. (8x8, Cells: 64) , more...
Chad W Smith [info] Colour Chess and Lure. Chess Variant where the board is different every time you play, and you can control what pieces your opponent can move next.
Chuck S Smith [info] Hockey Chess. Missing description (8x8, Cells: 64)
David L. Smith [info] Chex. Cards with pieces form the board. Chex. Cards with pieces form the board. Chex: photo's. Photo's of a chess variant formed of cards with chess piece symbols.
Gary Smith [info] Brickchucking Chess. Pieces cannot move backwards, but do give check/mate backwards. Brickchucking Chess. Pieces can only move forward, but attack the king in any direction.
Gavin Smith [info] Prince. 8x8x8 3-D variant with new pieces. (8x(8x8), Cells: 512) Prince . 3-D Chess variant using an 8x8x8 board and many new pieces.
Graham M. Smith [info] Ven Chess. Moves are written down by both players before making the moves simultaneously. (8x8, Cells: 64)
John Smith [info] 47 Contest Results. Missing description Prime Number Contest. Yes, just as the title says! I hope this is legal! Calorie Chess. Pieces have a limited amount of calories to move with, and have resorted to cannibalism! (8x8, Cells: 64) , more...
Larry L. Smith [info] Boolean Rithmomachia. Missing description (4x(4x4), Cells: 64) Borg Queen Variant of Star Trek 3D Chess. Variant of Star Trek 3D Chess. (7x(), Cells: 64) Cheaters' Chess. Missing description (8x8, Cells: 64) , more...
Lawrence C. Smith [info] The Crown of Krithala. Pieces move a crown which the opponent wants to capture. Thoughts on large numbers of players in one chess game. Missing description
Mike Smolowitz [info] Retro Chess I. A chess game progresses backwards from an empty board. (8x8, Cells: 64)
Moses Snell-Feikema [info] Open Chess. Large variant with few pawns. (12x12, Cells: 144) Open Chess . Large variant with few pawns.
Rafael Snell-Feikema [info] Three-Quarter Board. Missing description (8x8, Cells: 48)
Stephen Sniderman [info] Chessence. Small variant with many possible winning conditions.
Daphne Snowmoon [info] Citadelir chess. Grand chess + Tamerlane chess + Omega Chess. Leaperhouse. A 10x10 drop variant consisting of only Leapers, Shogi pawns and Kings. (10x10, Cells: 100) Mansindam (Pantheon Tale). A variant that combines 'drop' rule and strong pieces, and there is no draw. (9x9, Cells: 81) , more...
Tomasz Sobczyk [info] Tax Chess. King mobility affected by the placement of pawns of the same color.
Adam Sobey [info] Triplets. Move in one turn a pawn, the king, and another piece. (8x8, Cells: 64) Lambeth Conference. Bishops bounce off the walls. Triplet Chess. Each turn, move a king, a pawn, and another piece; win when opponent cannot., more...
Archimedeans Mathematics Society [info] Gess. A Chess variant played on a Go board where pieces are collections of go stones. (18x18, Cells: 324) Gess Applet . Missing description Gess. Combines GO with Chess: Invention of Archimedeans Mathematics Society, discussed by Ian Stewart in Scientific American., more...
Ohashi Soei [info] Tori Shogi. Tori Shogi, or Bird Shogi. A variant of Japanese Chess on a 7 by 7 board. (7x7, Cells: 49) Tori Shogi. Play this small Japanese Shogi variant on Jocly. Tori Shogi pictures. Pictures of a commercial Tori Shogi set., more...
Modest Solans [info] Battler Chess. Game with powerful King, and improved Bishops, Knights and Pawns. (8x8, Cells: 64) Heraldic chess. Chess with cards and dice. Heraldic Chess Games with Cards and Dice. Text of rule booklet of heraldic chess., more...
Siwakorn Songrag [info] Continental Chess. Continental Chess is Chess Variations with many types of pieces such as stepper, leaper, hopper and rider. (8x8, Cells: 64) Historia Ŝako. Historia Ŝako is a Chess variant incorporated between western and eastern variants, by track movement of Elephant and Queen. (8x8, Cells: 64)
Iwer Sonsch [info] Decisive Chess. Chess, but replacing draw rules with win/loss rules.
Viktor Sopilko [info] Tactical chess. Missing description (8x8, Cells: 64)
Marius Soska [info] Chess 3D. A java applet that plays a three dimensional chess variant.
Mikhail Sosnovsky [info] Bear Chess. A popular Russian game; bears leap to second perimeter. Bear Chess. Russian variant with new piece.
Emmor Ray Sperry [info] Mountain King Chess. First king to reach the center square of an 11 x 11 board wins.
George P. Spicas [info] Circe Chess problem 1. Series selfmate circe chess problem.
Peter Spicer [info] Pot-Hole Chess. Game where pot-holes open up on the board at random times. (8x8, Cells: 64)
James Killian Spratt [info] Chess for Three. Traditional pieces, three players, on a triangular board. Imperial Chess. Large variant with new pieces and victory by capture of royal pieces. (12x12, Cells: 144) Jetan Jeddara. Large Jetan variant, with new pieces. (16x12, Cells: 192) , more...
Richard Stack [info] Toystore Chess. A problem-like Chess variant on a 5x5 board with free placement. (5x5, Cells: 25) Toystore Chess. A problem-like Chess variant on a 5x5 board with free placement. Toystore Chess. A problem-like Chess variant on a 5x5 board with free placement.
Walter Stead [info] Grid Chess. Always move to a different 2 by 2 square part of the board. (8x8, Cells: 64) Roosterschaak (Grid Chess). Het bord is verdeeld in delen van 2 by 2 velden; een stuk moet altijd naar een ander deel gaan (Dutch Language) Grid. Always move to a different 4 by 4 square part of the board., more...
Laila W. Stefan [info] Imposter Chess . Exchange captured pieces in order to move Kings in different ways. Imposter Chess. Play this game! Exchange captured pieces in order to move Kings in different ways.
Paul Stein [info] Los Alamos Chess. Play the first variant ever programmed for computer play on Jocly.
Theodor Steubel [info] Exclusive Chess. Mate is only allowed if there is a unique way to do so.
Jake Stevenson [info] Stevenson's Four-Player Chess. A game for two 2-player teams on a regular Chess board with the object of capturing all opposing pieces.
Tim Stiles [info] Kylatori Sunset. Small variant combining replacement, custodian and coordination capture. (6x8, Cells: 48) Piececlopedia: Fox. Doubly-bent rider, inspired by the Gryphon and Aanca. Piececlopedia: Rabbit. A doubly-bent rider, inspired by the Gryphon and Aanca., more...
Charles W. Stinson [info] Agincourt. Decimal variant with Archers. (10x10, Cells: 100) Agincourt. Decimal variant with Archers.
Stephen R. Stockman [info] 4-Way Chess. Commercial fourhanded chess variant. 2006 World Chess Variants Championship on-line. World Chess Variants Championship. Air Attack Chess. Missing description, more...
Jed Stone [info] Free-for-All Chess. Player's may move either their own or their opponent's pieces. (8x8, Cells: 64) Assassin Chess. Shoot chess without royalty and with pawns that cannot be shot by line movers. Free-For-All Chess. Move either side's units.
Ian Storz [info] Diagonal Quadrant Chess. Pieces start in two of the four by four quadrants of the board. (8x8, Cells: 64) Diagonal Quadrant Chess. Different setup and pawn moves.
Steven Streetman [info] Bughouse Spartan Chess. streetmansd. (2x(8x8), Cells: 128) Spartan Chess. A game with unequal armies. (8x8, Cells: 64) Spartan Chess. Play this unequal armies variant on Jocly., more...
W. G. H. Strijbos [info] Checkmate Sliding Puzzle. Slide squares in this puzzle such that the black king becomes mated.
Greg Strong [info] Game Courier Tournament 2017. Chess Variant Tournament played on Game Courier in 2017. Game Courier Tournament 2019. Chess Variant Tournament to be played on Game Courier. Angels and Devils. Chess game where white has two Angels and black has two Devils. (10x8, Cells: 80) , more...
Jeff `Cavebear` Stroud [info] ABC Chess. A variant with 8 armies of pieces generated by combining 1, 2 or 3 simpler pieces. (8x8, Cells: 64) Wild Jokers. 7 by 7 board with 8 pits and various pieces, including jokers that can make successive jumps across pits. (7x7, Cells: 41) Pawn Massacre Chess. Black pieces start behind white pawns and vice versa., more...
Duncan Suttles [info] Sir Bombalot. A variant of chess with pieces offering a myriad of different options at any given time. Bomb Chess. Queen's Rook moves as king and can explode. Tank Chess II. Queen's Rooks are Tanks, and can push lines of pieces.
Aamir Syed [info] Arimaa. Uses same equipment as Chess, but designed to be difficult for computers. Arimaa. Board game playable with standard chess set, hard for computers. (8x8, Cells: 64)
Omar Syed [info] Arimaa. Uses same equipment as Chess, but designed to be difficult for computers. Arimaa. Board game playable with standard chess set, hard for computers. (8x8, Cells: 64)