Community variant

Rookback chess

Every piece (including pawns) can only move backwards as a rook. Diagonal backwards king movement is conserved.

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 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), custom piece 4 (q), rook (r), custom piece 3 (b), custom piece 2 (n) and custom piece 1 (p).
custom piece 1 (p) is a custom piece with Betza movement `fmWfceFbRinmfD`.
custom piece 2 (n) is a custom piece with Betza movement `ffNfsNbR`.
custom piece 3 (b) is a custom piece with Betza movement `fBbR`.
custom piece 4 (q) is a custom piece with Betza movement `fQsRbR`.
The royal piece king (k) uses custom Betza movement `fKsKbR`.

Promotion

The pieces that can promote are: custom piece 1 (p).
Promotion choices are both sides: custom piece 2 (n), custom piece 3 (b), rook (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 (P) movement

fmWfceFbRinmfD

Custom piece 2 (N) movement

ffNfsNbR

Custom piece 3 (B) movement

fBbR

Custom piece 4 (Q) movement

fQsRbR

Custom king (K) movement

fKsKbR

move capture move or capture initial only hopper target

Fairy-Stockfish rules

[rookback:chess]
pawn = -
knight = -
bishop = -
queen = -
customPiece1 = p:fmWfceFbRinmfD
customPiece2 = n:ffNfsNbR
customPiece3 = b:fBbR
customPiece4 = q:fQsRbR
king = k:fKsKbR
pawnTypes = p
promotionPieceTypes = nbrq