Community variant
Wojtek chess
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: custom piece 5 (r), custom piece 6 (n), custom piece 3 (a), custom piece 2 (w), custom piece 4 (l) and custom piece 1 (v).
- custom piece 1 (v) is a custom piece with Betza movement `mfW1cfW1`.
- custom piece 2 (w) is a custom piece with Betza movement `QN`.
- custom piece 3 (a) is a custom piece with Betza movement `BN`.
- custom piece 4 (l) is a custom piece with Betza movement `mW2mF2`.
- custom piece 5 (r) is a custom piece with Betza movement `R pR`.
- custom piece 6 (n) is a custom piece with Betza movement `Z`.
Move rules
- Castling is not allowed.
- Players may pass their turn.
Promotion
- Promotion choices are both sides: custom piece 6 (n), custom piece 2 (w), custom piece 5 (r) and custom piece 3 (a).
Winning and losing
- An extinction rule is active: reaching 0 remaining piece(s) l causes a loss for the side to move.
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.
mfW1cfW1
QN
BN
mW2mF2
R pR
Z
move
capture
move or capture
initial only
hopper target
Fairy-Stockfish rules
[wojtek-chess:chess]
king = -
pass = true
pawnTypes = v
castling = false
customPiece1 = v:mfW1cfW1
customPiece2 = w:QN
customPiece3 = a:BN
customPiece4 = l:mW2mF2
customPiece5 = r:R pR
customPiece6 = n:Z
extinctionValue = loss
extinctionPieceTypes = l
extinctionPseudoRoyal = true
promotionPieceTypes = nwra
startFen = nwraarln/vvvvvvvv/8/8/8/8/VVVVVVVV/NWRAARLN w - 0 1