Community variant

Forward only chess

You can't go backwards !

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: Rom142857
Visibility: public
Status: active

Generated rule overview

This variant is defined directly from a Fairy-Stockfish rule block. The text below is generated from the available configuration and may omit details that are only implicit in piece movement notation.

Board and setup

Default starting position

Pieces and movement

The piece set used on the board is: king (k), custom piece 4 (q), custom piece 3 (r), custom piece 2 (b), custom piece 1 (n) and pawn (p).
The royal piece king (k) uses custom Betza movement `fKsW`.
custom piece 1 (n) is a custom piece with Betza movement `fNfsN`.
custom piece 2 (b) is a custom piece with Betza movement `fB`.
custom piece 3 (r) is a custom piece with Betza movement `fRsR`.
custom piece 4 (q) is a custom piece with Betza movement `fQsR`.

Promotion

The pieces that can promote are: pawn (p).
Promotion choices are both sides: custom piece 1 (n), custom piece 2 (b), custom piece 3 (r) and custom piece 4 (q).

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.

Custom piece 1 (N) movement

fNfsN

Custom piece 2 (B) movement

fB

Custom piece 3 (R) movement

fRsR

Custom piece 4 (Q) movement

fQsR

Custom king (K) movement

fKsW

move capture move or capture initial only hopper target

Fairy-Stockfish rules

[forwardonly]
king = k:fKsW
pawn = p
customPiece1 = n:fNfsN
customPiece2 = b:fB
customPiece3 = r:fRsR
customPiece4 = q:fQsR
promotionPieceTypes = nbrq
castlingRookPieces = r