Community variant
Flipersi
Fairy-Stockfish built-in variant exposed as a casual community variant.
References:
Wikipedia
This is a curated Fairy-Stockfish built-in variant. Gameplay uses Fairy-Stockfish's canonical built-in definition.
The documentation block below mirrors the relevant built-in settings for the generated overview and movement diagrams.
Generated rule overview
This variant is defined directly from a Fairy-Stockfish rule block. The text below is generated from the available configuration and may omit details that are only implicit in piece movement notation.
Board and setup
Pieces and movement
- The piece set used on the board is: Disc (p).
Move rules
- Castling is not allowed.
- Pawn double-step moves are disabled.
Drops and hands
- Pieces in hand can be dropped back onto the board. Droppable pieces are: Disc (p).
- Drops must satisfy an enclosing/placement rule before they are legal.
Capture effects
- Enclosed pieces change color after certain drops or moves.
Winning and losing
- Stalemate is scored as a loss for the side to move.
Draws and adjudication
- Material counting adjudication is enabled.
- Material counting is applied immediately when the board is full.
Fairy-Stockfish rule documentation
[flipersi]
pawn = -
knight = -
bishop = -
rook = -
queen = -
king = -
immobile = p
pieceDrops = true
doubleStep = false
castling = false
immobilityIllegal = false
stalemateValue = loss
stalematePieceCount = true
enclosingDrop = reversi
enclosingDropStart = d4 e4 d5 e5
flipEnclosedPieces = reversi
materialCounting = unweighted
adjudicateFullBoard = true
passOnStalemate = false