In shogi, Double Ranging Rook (also Double Swinging Rook, Mutual Swinging Rook) (相振り飛車 ai-furibisha) is a class of Ranging Rook openings in which both players choose a Ranging Rook position. The term does not apply when one player (or both) moves their rook to their respective fourth or third files (Right Fourth File Rook, Sleeve Rook) as these are still considered to be Static Rook positions. The most often played game among professionals is Black's Opposing Rook vs White's Third File Rook. * v * t * e