Community variant

Cannon Pawn Chess

Cannon Pawn Chess replaces the pawns with cannon pawns. All else is as in Chess (castling, promotions) other than there is no en-passant capture. Cannon Pawns move as a king OR they can hop over any adjacent piece to either land on a vacant square behind it (move) or if that landing square is occupied by an enemy piece, the cannon pawn will capture it by displacement.

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: sagig72
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), rook (r), bishop (b), knight (n) and custom piece 1 (t).
custom piece 1 (t) is a custom piece with Betza movement `mKpQ2`.

Promotion

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

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 (T) movement

mKpQ2

move capture move or capture initial only hopper target

Fairy-Stockfish rules

[cannon_pawn_chess:chess]
customPiece1 = t:mKpQ2
promotionPieceTypes = n b r q
promotionPawnTypes = t
startFen = rnbqkbnr/tttttttt/8/8/8/8/TTTTTTTT/RNBQKBNR w KQkq - 0 1