Billed as "The World's Smallest Shogi Variant," Nana Shogi is played on a 3x3 board with two identical sets of three pieces. Rules are similar to the parent game, Shogi, but some pieces are cubes that can be promoted through a cycle of four faces taken from several other Shogi variants. The Three Types of Pieces A conventional Shogi king An orthogonally-moving piece (Rook/Chariot/Swallow's Wings/Go-between) A diagonally-moving piece (Bishop/Tile General/Cat's Sword/Dog)