Balbo's game is a chess variant invented by M. [Monsieur] G. Balbo in 1974. The chessboard has a novel shape comprising 70 squares, and each player commands a full chess army minus one pawn.
The game was featured in Le Courrier des Echecs magazine, September 1974.
The starting setup is as shown. All the rules of chess apply, except there is no castling, and promotion squares are specially defined:
Bibliography
. David Pritchard (chess player) . The Encyclopedia of Chess Variants . Games & Puzzles Publications . 1994 . 0-9524142-0-1.
. David Pritchard (chess player) . Beasley . John . The Classified Encyclopedia of Chess Variants . John Beasley . 2007 . 978-0-9555168-0-1.