Community variant

Syno-horde

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: Videocatter
Visibility: public
Status: active

Generated rule overview

This variant inherits its base rules from `chess` 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), bishop (b), knight (n), pawn (p), custom piece 2 (a), custom piece 4 (s) and rook (r).
custom piece 2 (a) is a custom piece with Betza movement `K`.
custom piece 2 (a) is a custom piece with Betza movement `K`.
custom piece 4 (s) is a custom piece with Betza movement `P`.
custom piece 4 (s) is a custom piece with Betza movement `fWlWrW`.

Promotion

Promotions are available in the configured promotion zones. The the promotion region for White is all squares on rank 8 and the promotion region for Black is all squares on rank 9.
The pieces that can promote are: pawn (p).
Promotion choices are both sides: queen (q), rook (r), bishop (b), knight (n) and custom piece 2 (a).

Winning and losing

An extinction rule is active: reaching 1 remaining any piece causes a loss for the side to move.
Stalemate is scored as 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.

Custom piece 1 (A) movement

K

Custom piece 2 (A) movement

K

Custom piece 3 (S) movement

P

Custom piece 4 (S) movement

fWlWrW

move capture move or capture initial only hopper target

Fairy-Stockfish rules

[synohorde:chess]
pieceToCharTable = PNBRQK.......A.........S...pnbrqk......a.........s...
startFen = aaakaaaa/ssssssss/ssssssss/1ssssss1/8/8/PPPPPPPP/QNBQKBNQ w - - 0 1
customPiece1 = A:K
customPiece2 = a:K
customPiece3 = S:P
customPiece4 = s:fWlWrW
stalemateValue = loss
extinctionValue = loss
extinctionPieceTypes = *
extinctionPieceCount = 1
promotionPieceTypes = q r b n a A
promotionPawnTypes = p
promotionRegionWhite = *8
promotionRegionBlack = *9