Community variant
Ches
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 1 (k), queen (q), rook (r), bishop (b), knight (n) and pawn (p).
- rook (r) is a custom piece with Betza movement `W`.
- bishop (b) is a custom piece with Betza movement `F`.
- queen (q) is a custom piece with Betza movement `K`.
- pawn (p) is a custom piece with Betza movement `mfW`.
Move rules
- Castling is not allowed.
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.
W
F
K
mfW
move
capture
move or capture
initial only
hopper target
Fairy-Stockfish rules
[badchess:chess]
variantTemplate = chess
# 1. Immobile King (cannot move at all)
customPiece1 = k:
# 2. Nerfed pieces (1 square movement)
# r = Wazir (1 square orthogonal, move/capture)
customPiece2 = r:W
# b = Ferz (1 square diagonal, move/capture)
customPiece3 = b:F
# q = King step (1 square any direction, move/capture)
customPiece4 = q:K
# p = Non-capturing pawn (moves forward 1 square, cannot capture at all)
customPiece5 = p:mfW
# 3. Map pieces
king = k K
rook = r
bishop = b
queen = q
pawn = p
# 4. Rules & Setup
castling = false
startFen = rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w - - 0 1