Community variant

Mayhem Chess

Created by Christina Ziolkowski,full rule:https://www.chessvariants.com/diffsetup.dir/mayhem.html

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: brotopskeu_46227
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), Queen (q), rook (r), knight (n), Paladin (p), Janus pawn (j) and bishop (b).
Janus pawn (j) is a custom piece with Betza movement `mfWcF`.
Queen (q) is a custom piece with Betza movement `Q4`.

Move rules

Castling is not allowed.

Promotion

The pieces that can promote are: Janus pawn (j).
Promotion choices are both sides: knight (n), rook (r), bishop (b), Queen (q) and Paladin (p).

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.

Janus pawn (J) movement

mfWcF

Queen (Q) movement

Q4

move capture move or capture initial only hopper target

Fairy-Stockfish rules

[mayhemchess:chess]
archbishop = p
customPiece1 = j:mfWcF
customPiece2 = q:Q4
startFen = pnjqkjnp/j1r2r1j/1j1jj1j1/8/8/1J1JJ1J1/J1R2R1J/PNPQKPNP w - 0 1
castling = false
promotionPawnTypes = j
promotionPieceTypes = nrbqp