Community variant

Seirawan Plus Minus

Archbishop demoted into Leopard. An attempt to try keep it less top-heavy aligned.

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.

Uploaded by: Nordlandia
Visibility: public
Status: active

Generated rule overview

This variant inherits its base rules from `seirawan` and overrides the settings shown below.

Board and setup

Default starting position

Pieces and movement

The piece set used on the board is: king (k), queen (q), rook (r), bishop (b), knight (n), pawn (p), Elephant (e) and custom piece 1 (j).
custom piece 1 (j) is a custom piece with Betza movement `F2N`.

Drops and hands

Pieces in hand can be dropped back onto the board. Droppable pieces are: Elephant (e) and custom piece 1 (j).

Promotion

The pieces that can promote are: pawn (p).
Promotion choices are both sides: queen (q), Elephant (e), custom piece 1 (j), bishop (b), knight (n) and rook (r).

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.

Custom piece 1 (J) movement

F2N

move capture move or capture initial only hopper target

Fairy-Stockfish rules

[seirawanplusplusminus_1:seirawan]
customPiece1 = j:F2N
startFen=rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR[EJej] w KQBCDFGkqbcdfg - 0 1
promotionPieceTypes=qejbnr