The Tsukada Special (Japanese: 塚田スペシャル, Tsukada Supesharu) is a shogi opening strategy categorized under the Double Wing Attack (相掛かり, Aigakari) style of play. It was developed by professional shogi player Yasuaki Tsukada and became a prominent tactical innovation in the mid-1980s.
The strategy is characterized by an aggressive and rapid pawn exchange on the second file, followed by a specific rook maneuver intended to disrupt the opponent's camp before they can establish a solid defensive formation. Unlike traditional Aigakari variations of that era, which often prioritized slow building of positions, the Tsukada Special sought to initiate early-game conflict and pressure the opponent's gold and silver generals.
The Tsukada Special had a significant impact on professional shogi theory during its peak. For the development and successful implementation of this strategy, Yasuaki Tsukada was awarded the 14th Masuda Award in 1986, an honor given to players who introduce innovative new moves or theories to the game.
The effectiveness of the Tsukada Special forced a re-evaluation of defensive techniques in the Double Wing Attack. While subsequent research and the development of specific countermeasures eventually led to a decrease in its frequency in top-level professional play, it remains a recognized tactical milestone in the evolution of modern shogi openings.