Modifiers:
Random Promotion (with special animation casino slot)
No Promotion
only queen promotion
only knight promotion
only rook promotion
only bishop promotion
No En passant
Swap Two Pieces : swap 2 pieces from a team (not kings)
Swapper : swaps piece randomly every move, n % chance
Freeze Most Recent : freeze the most recent piece during 3 turns (not the king)
En passant forced
Any Capture : You can take your own pieces
Barbarians : 10% of empty squares become barbarian bishop and knights, barbarians does a random move after white's move
Barbarians+ : 15% of empty squares become barbarian bishop and knights rook queens barbarians does a random move after white's move
Retreat : Pawns can go backwards
Overpass : Pieces can go above their allies
Crawl : Pawn can't go 2 squares
Torpedo : Pawn can always go 2 squares
Leap : Pawns can only go 2 squares
Sideways : pawns can go 1 square sideways
Upsidedown : pawns go backwards and promote backwards
Regal Sweep : King has Queen moves
Frozen Wonderland : some pieces are frozen during 1-15 moves
Reverse Strike : Pawns can capture towards them
Inward Strike : Pawns can only capture towards them
Allow Passing : you can choose to not play a move
Double Play : 2 moves at a time
Bare Piece : if you only have 1 piece you lose
Duck Chess
Opposite Castling : if opponent already castled from one side you can't castle the same side
no big castle
no small castle
no castling
Teleporter Madness : add 3 pairs of portals on the map
Atomic : capture make boom all the pieces in a 3x3 square except pawns
Fatal Capture : pieces that capture die (expect pawns), king cannot capture
Blindfold : invisible pieces
Ghostboard : boards and clocks are invisible
Forward March : Pieces can't go backwards
Colorblind
Crazyhouse
Racing Kings
Ignore Check : not warned of checks
Mystery Chess : Chess 960 but all the pieces have random assets even pawns (you can't know how the pieces moves)
4 Players chess
Royal Quota : Half of your moves has to be King moves, if your King can't move you lose
Corregal : Queen can be checked and checkmated too
Decimation : same rules as Giveaway, you win by capturing all opponent pieces
Knighmate : Knights are capturable kings and the king is now a knight
Extinction : players win by capturing all opposing pieces of a particular type
pawn only chess : first promotion is win
Bouncing : Bishop and Queen can bounce on one side
Infinite Boucing : Bishop and Queen can bounce indefinitely
Cylinder : left and right sides are joined like a cylinder
Berolina : pawns capture towards but moves diagonally
Cannibal : pieces transform in what they captured
Absorption pieces gain the movements of pieces that they captured
https://en.wikipedia.org/wiki/Fischer_random_chess#Similar_variants
Chess 18
Shuffle chess
Chess 2880
some ChessCraft ideas
Reverse Backrank : the two last rows are reversed
Fog of War
Half Chaos : Half of the moves are random (first move is not random)
Asset Chaos : Every move all the assets are randomized
Black plays first
Simple Rules : disable Castling, en passant (and promotion maybe?)
Thanos : destroy 75% of the pieces (wall included)
Random plays first
Random position
Mirror = Move one of your pieces first then one of enemy pieces for every turn
Pawn Parade = You have to move every pawns before moving any other pieces
Half Commitment = Half of moves have to be irreversible
Unique Step : can't go the same square with the same type of piece
Abstract : https://www.di.fc.ul.pt/~jpn/gv/abchess.htm
Accelerated : After White's initial move, each turn consists of two non-capturing moves or one capturing move. Stalemate loses.
Active : 9x8 board was a second queen either on file 8 or file 9
Rotating Center : clockwise anticlockwise or diagonal
Advance : Pawns rows are now at 3th and 6th
All-in : if white plays his pieces black plays his pieces, if white plays black's pieces black plays white's pieces, no reverse move
All-mate : all the pieces can be mated, capture a piece by mating it, king in check is legal
Almost : queen is a knook
Amazon : queen move like bishop rook and knight
Annihilation : Decimation chess, there is no move that check the king, promoting to the best that doesn't check
Anti-Gravity : when the piece move to the square, every pieces are pushed like a rook moves
Anti-Magnet : Anti-Gravity but same colors attract
Anywhere : Pieces may make non-capturing moves anywhere. Exceptions: Pawns cannot go to their first ranks, and must move to the queening rank normally. Bishops may change color. Kings may only move normally.
Archimedes : Capture by attacking an enemy unit with two of yours.
Alternating : Each side alternates between moving pawn and piece.
Atlantis : You may sink an edge square instead of moving a unit
Bachelor : All units can promote on the eighth rank. One can also win by getting one's king and a friendly queen onto adjoining squares. Escaping from check takes precedence though.
Pieces:
ChessCraft ideas
Tiles modifiers:
Instance Void : start void after 3 to 6 moves
Random Walls : 10% empty squares are walls
Tripmines : explode 1 radius
Minefield : 5% empty squares are mines and 0.5% chance that a square turn into a mine every turn
Teleporters
Randomizer tile : change randomly the piece that goes on it
Clone tile : duplicate the piece that goes on it
Dice tile : 50% mine exploding 50% duplicating the piece that goes on the tile gamble
The Void : every move one square is the void, king can't go there, if void piece dead
Bonfire tile : burn pieces around, pieces in fire can survive 3 turns
Nuke : explodes any pieces in 2 radius if pressed
Present/Gift : add a new randow piece for the team
X-Bomb (rook or bishop moves) : explodes in n turns
Board modifiers:
Super Size : increase the size of the board by 2 or 4
NoaLeGeek
commented
6 months ago
https://greenchess.net/variants.php?cat=4 https://www.chessvariants.org/play/erf/ChessVar.html
Gamemodes: Puissance 4 Pawns Mutation chess : https://fr.wikipedia.org/wiki/Chess_mutation#:~:text=Chess%20mutation%20est%20un%20jeu,il%20se%20joue%20%C3%A0%20deux.
Modifiers: Random Promotion (with special animation casino slot) No Promotion only queen promotion only knight promotion only rook promotion only bishop promotion No En passant Swap Two Pieces : swap 2 pieces from a team (not kings) Swapper : swaps piece randomly every move, n % chance Freeze Most Recent : freeze the most recent piece during 3 turns (not the king) En passant forced Any Capture : You can take your own pieces Barbarians : 10% of empty squares become barbarian bishop and knights, barbarians does a random move after white's move Barbarians+ : 15% of empty squares become barbarian bishop and knights rook queens barbarians does a random move after white's move Retreat : Pawns can go backwards Overpass : Pieces can go above their allies Crawl : Pawn can't go 2 squares Torpedo : Pawn can always go 2 squares Leap : Pawns can only go 2 squares Sideways : pawns can go 1 square sideways Upsidedown : pawns go backwards and promote backwards Regal Sweep : King has Queen moves Frozen Wonderland : some pieces are frozen during 1-15 moves Reverse Strike : Pawns can capture towards them Inward Strike : Pawns can only capture towards them Allow Passing : you can choose to not play a move Double Play : 2 moves at a time Bare Piece : if you only have 1 piece you lose Duck Chess Opposite Castling : if opponent already castled from one side you can't castle the same side no big castle no small castle no castling Teleporter Madness : add 3 pairs of portals on the map Atomic : capture make boom all the pieces in a 3x3 square except pawns Fatal Capture : pieces that capture die (expect pawns), king cannot capture Blindfold : invisible pieces Ghostboard : boards and clocks are invisible Forward March : Pieces can't go backwards Colorblind Crazyhouse Racing Kings Ignore Check : not warned of checks Mystery Chess : Chess 960 but all the pieces have random assets even pawns (you can't know how the pieces moves) 4 Players chess Royal Quota : Half of your moves has to be King moves, if your King can't move you lose Corregal : Queen can be checked and checkmated too Decimation : same rules as Giveaway, you win by capturing all opponent pieces Knighmate : Knights are capturable kings and the king is now a knight Extinction : players win by capturing all opposing pieces of a particular type pawn only chess : first promotion is win Bouncing : Bishop and Queen can bounce on one side Infinite Boucing : Bishop and Queen can bounce indefinitely Cylinder : left and right sides are joined like a cylinder Berolina : pawns capture towards but moves diagonally Cannibal : pieces transform in what they captured Absorption pieces gain the movements of pieces that they captured https://en.wikipedia.org/wiki/Fischer_random_chess#Similar_variants Chess 18 Shuffle chess Chess 2880 some ChessCraft ideas Reverse Backrank : the two last rows are reversed Fog of War Half Chaos : Half of the moves are random (first move is not random) Asset Chaos : Every move all the assets are randomized Black plays first Simple Rules : disable Castling, en passant (and promotion maybe?) Thanos : destroy 75% of the pieces (wall included) Random plays first Random position Mirror = Move one of your pieces first then one of enemy pieces for every turn Pawn Parade = You have to move every pawns before moving any other pieces Half Commitment = Half of moves have to be irreversible Unique Step : can't go the same square with the same type of piece Abstract : https://www.di.fc.ul.pt/~jpn/gv/abchess.htm Accelerated : After White's initial move, each turn consists of two non-capturing moves or one capturing move. Stalemate loses. Active : 9x8 board was a second queen either on file 8 or file 9 Rotating Center : clockwise anticlockwise or diagonal Advance : Pawns rows are now at 3th and 6th All-in : if white plays his pieces black plays his pieces, if white plays black's pieces black plays white's pieces, no reverse move All-mate : all the pieces can be mated, capture a piece by mating it, king in check is legal Almost : queen is a knook Amazon : queen move like bishop rook and knight Annihilation : Decimation chess, there is no move that check the king, promoting to the best that doesn't check Anti-Gravity : when the piece move to the square, every pieces are pushed like a rook moves Anti-Magnet : Anti-Gravity but same colors attract Anywhere : Pieces may make non-capturing moves anywhere. Exceptions: Pawns cannot go to their first ranks, and must move to the queening rank normally. Bishops may change color. Kings may only move normally. Archimedes : Capture by attacking an enemy unit with two of yours. Alternating : Each side alternates between moving pawn and piece. Atlantis : You may sink an edge square instead of moving a unit Bachelor : All units can promote on the eighth rank. One can also win by getting one's king and a friendly queen onto adjoining squares. Escaping from check takes precedence though.
Pieces: ChessCraft ideas
Tiles modifiers: Instance Void : start void after 3 to 6 moves Random Walls : 10% empty squares are walls Tripmines : explode 1 radius Minefield : 5% empty squares are mines and 0.5% chance that a square turn into a mine every turn Teleporters Randomizer tile : change randomly the piece that goes on it Clone tile : duplicate the piece that goes on it Dice tile : 50% mine exploding 50% duplicating the piece that goes on the tile gamble The Void : every move one square is the void, king can't go there, if void piece dead Bonfire tile : burn pieces around, pieces in fire can survive 3 turns Nuke : explodes any pieces in 2 radius if pressed Present/Gift : add a new randow piece for the team X-Bomb (rook or bishop moves) : explodes in n turns
Board modifiers: Super Size : increase the size of the board by 2 or 4
Don't forget incompatibilities : {"no_castling": ["O-O", "O-O-O"..., "O-O: ["no_castling"]}