Community variant
Pawnpower
Giving every piece pawnpower
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 Pawnrider (v).
- Pawnrider (v) is a custom piece with Betza movement `fRF`.
- The royal piece king (k) uses custom Betza movement `KWfF`.
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.
fRF
KWfF
move
capture
move or capture
initial only
hopper target
Fairy-Stockfish rules
[pawnpower:chess]
# 1. Clear out the original standard pawn
pawn = -
# 2. Define the pure pawnrider (pawn + pawn power) using customPiece1 mapped to 'v'
customPiece1 = v:fRF
# 3. Override standard pieces to add forward pawn power via Betza notation
knight = n:NWfF
bishop = b:BWfF
rook = r:RWfF
queen = q:QWfF
king = k:KWfF
# 4. Material Valuations (Middlegame and Endgame)
pieceValueMg = v:250
pieceValueMg = n:380
pieceValueMg = b:400
pieceValueMg = r:550
pieceValueMg = q:1000
pieceValueMg = k:20000
pieceValueEg = v:250
pieceValueEg = n:360
pieceValueEg = b:380
pieceValueEg = r:530
pieceValueEg = q:950
pieceValueEg = k:20000
# 5. Starting Position FEN using 'v' for the pawnrider wall and
# lowercase/uppercase letters for the upgraded back-rank pieces
startFen = rnbrqknr/vvvvvvvv/8/8/8/8/VVVVVVVV/RNBRQKNR w KQkq - 0 1