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Mac Cooey's chess is a hexagonal chess variant played on a 91 hexagonal cells board.

Each player commands 16 pieces

Initial setup

There is no castling. Stalemate is counted as a draw.

Pieces moves

The King

The Queen

The Bishop

The Rook

The Knight

The Pawn

Double step from starting position is allowed except for f file pawns. The pawn capture corresponds to a one step Bishop's move. See crosses for captures. "En passant" captures are possible.


Rules were invented in 1978-1979 by Dave McCooey and Richard Honeycutt.

Jocly implementation

Special thanks to László Németh who gave a lot of CC0 content on Wikipedia for boards and pieces illustrations (used in rules section).