Community variant

Sultan Chess

Rules from https://musketeerchess.net/ Black has an extremely powerful piece: the Sultan. Citadels and the Unicorn shall help white, but the Pawns refuse to promote

This is a user-catalogued casual variant. Technical details such as board size, FEN, pieces, and hand rules are defined in the Fairy-Stockfish variants.ini block below.

Uploaded by: hiyay
Visibility: public
Status: active

Generated rule overview

This variant inherits its base rules from `chess` and overrides the settings shown below.

Board and setup

Default starting position

Pieces and movement

The piece set used on the board is: king (k), bishop (b), knight (n), Pawn (p), Citadel (c), Sultan (s) and Unicorn (u).
Pawn (p) is a custom piece with Betza movement `imfR2mfWcfF`.
Sultan (s) is a custom piece with Betza movement `GHADCNQ`.
Unicorn (u) is a custom piece with Betza movement `CN`.
Citadel (c) is a custom piece with Betza movement `GHADR`.

Move rules

Castling is not allowed.

Winning and losing

An extinction rule is active: reaching 0 remaining piece(s) s causes a loss for the side to move.

Piece movement

These diagrams show custom pieces and known Fairy-Stockfish built-in fairy pieces from White's perspective on a compact preview board. Some special moves, especially hoppers and game-state-dependent moves, can still depend on blockers or game state.

Pawn (P) movement

imfR2mfWcfF

Sultan (S) movement

GHADCNQ

Unicorn (U) movement

CN

Citadel (C) movement

GHADR

move capture move or capture initial only hopper target

Fairy-Stockfish rules

[sultanchess:chess]

pawn= -
queen= -
rook= -
customPiece1= p:imfR2mfWcfF

castling= false

customPiece2= s:GHADCNQ
customPiece3= u:CN
customPiece4= c:GHADR

extinctionValue= loss
extinctionPieceTypes= s
extinctionPseudoRoyal= true

startFen= 2nsn3/8/8/8/8/8/PPPPPPPP/CNBuKBNC w - - 0 1