Community variant
berolina_house
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 `crazyhouse` 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 `mfFcfWimfF2`.
Drops and hands
- Pieces in hand can be dropped back onto the board. Droppable pieces are: king (k), queen (q), rook (r), bishop (b), knight (n) and custom piece 1 (p).
Promotion
- The pieces that can promote are: custom piece 1 (p).
- Promotion choices are both sides: queen (q), rook (r), knight (n) and bishop (b).
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.
mfFcfWimfF2
move
capture
move or capture
initial only
hopper target
Fairy-Stockfish rules
[berolina_house:crazyhouse]
customPiece1 = p:mfFcfWimfF2
pawnTypes = p
startFen = rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR[] w KQkq - 0 1
promotionPieceTypes = q r n b
variantTemplate = fairy