Four armies. One board. Clockwise.

The board is fourteen by fourteen with the corners cut out — 160 squares. Red starts and play goes clockwise: Red, Blue, Yellow, Green.

• Every capture is worth points: pawn 1knight 3bishop 5 rook 5queen 9 — a bishop is worth as much as a rook on a board this wide.
• A checkmate is worth 20 to whoever delivered it. The mated army stays on the board but goes grey: it blocks, and it is worth nothing to capture.
• A stalemated player is out and keeps 20 points for it.
• Pawns promote six squares up, on their own eighth rank. A queen made from a pawn is only worth 1 when captured.
• It ends when three are out, or when two are left and one is 21 clear.

Castling and en passant are both on. Teams play Red and Yellow against Blue and Green: you cannot take your partner's pieces, pawns promote further up, and mating either opponent wins it.