Three-Pawn Sacrifice Rapid Attack (三歩突き捨て急戦 san-fu tsukisute kyuusen) is a fast attacking strategy in shogi. It's a Static RookBoat Rapid Attack strategy against Black's (sente) blocking the bishop's diagonal in a Third File Rook. It was created by Hifumi Katō.
Overview
Initial diagram
☖ pieces in hand: –
9
8
7
6
5
4
3
2
1
香
桂
金
桂
香
1
飛
銀
金
銀
王
角
2
歩
歩
3
歩
歩
歩
歩
歩
歩
4
歩
5
歩
歩
歩
歩
歩
6
歩
歩
角
歩
歩
7
飛
銀
金
銀
玉
8
香
桂
金
桂
香
9
☗ pieces in hand: –
Diagram 2
☖ pieces in hand: –
9
8
7
6
5
4
3
2
1
香
桂
金
桂
香
1
飛
金
銀
王
角
2
銀
歩
歩
3
歩
歩
歩
歩
4
歩
歩
5
歩
歩
歩
歩
歩
6
角
金
歩
歩
7
飛
銀
銀
玉
8
香
桂
金
桂
香
9
☗ pieces in hand: – 歩 (3)
Position following the three pawn sacrifices
In this fast attack strategy the aimed move becomes evident when, in the accompanying diagram, following gote's P-94, sente defends with P-96. From P-96, it follows ...S-62-53, G-47 (although P-36 might be better if gote was aiming for a fast attack with P-45), and then, three sacrifice pushes of pawns with P-86, Px86 (since Bx86, will be followed by Bx66, S-77, B-2b, and gote is better), P-95, Px95, and, P-75, Px75 (Diagram 2), which, if taken by sente will leave gote in a better position following Lx95, Lx95, P*76, B-99, Rx86.[1] After that, R-88, Rx88+, Bx88, R*87 is a possibility.
^青野 1988, p. 106–146, Chap. 4: 先手三間飛車対三歩突き捨ての作戦 [Sente's Third File-Rook vs. Three-Pawn Sacrifice strategy].
Bibliography
青野, 照市 [Teruichi Aono] (1988). 先手三間飛車破り―急戦で仕掛ける攻略法を徹底解説 [Destroying Third File Rook: A Thorough Explanation of How to Invade with Rapid Attacks]. Sougensha. ISBN978-4422750361.