Community variant
Backward capture pawns
Pawns capture one square diagonally in any direction including backwards, make non-capture moves like in ordinary chess. Pawn can always double step from first and second rank regardless how they got there, pawn on 7th rank can capture en passant backwards. Promoting once reaching 8th rank is optional, it is allowed to keep a pawn unpromoted
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.
Generated rule overview
This variant inherits its base rules from `chess` and overrides the settings shown below.
Board and setup
Pieces and movement
- The piece set used on the board is: king (k), queen (q), rook (r), bishop (b), knight (n) and custom piece 1 (p).
- custom piece 1 (p) is a custom piece with Betza movement `fmWceFifmnD`.
Promotion
- The pieces that can promote are: custom piece 1 (p).
- Promotion choices are both sides: queen (q), knight (n), rook (r), bishop (b) and custom piece 1 (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.
fmWceFifmnD
move
capture
move or capture
initial only
hopper target
Fairy-Stockfish rules
[backwards_capture_pawns:chess]
customPiece1=p:fmWceFifmnD
promotionPawnTypes = p
doubleStepRegionWhite = *1 *2
doubleStepRegionBlack = *7 *8
promotionPieceTypes=qnrbp