A common variation. Both players' kings are fully inside Fortress castles. Black has advanced their right offensive silver to 37 while White's bishop is positioned on 64.
Fortress (矢倉 or 櫓 yagura) is both a Static Rook opening (矢倉戦法 yagura senpō) and a castle in shogi.
It is usually played in a Double Static Rook opening, which is often a Double Fortress opening. However, it may also occur in different Double Static Rook openings such as Fortress vs Right Fourth File Rook.
The Fortress castle (矢倉囲い yagura gakoi), which is the defining characteristic of Fortress games, was considered by many to be one of the strongest defensive positions in Double Static Rook games in the 1980s.[1]
The term yagura is the Japanese word for a tower-like structure in traditional Japanese castles.
The most commonly encountered Fortress strategies occur in Double Fortress games where both players use a Fortress formation.
Historical Fortressedit
Earlier josekis for Fortress in the Edo period (usually spelled 櫓 at that time) were very different from the current josekis.
For instance, in one variation, it is White who delays pushing their rook pawn (whereas Black delays the rook pawn push in the modern era) and an early bishop trade occurs before both players' kings are moved into their castles.
Position after move 32 in an Ōza match between Habu (Black) and Nakamura (White) on September 18, 2013.
The Snowroof strategy can be played against a Fortress opponent.
Modern Snowroof vs Fortress
☖ pieces in hand: –
9
8
7
6
5
4
3
2
1
香
桂
王
角
桂
香
1
飛
銀
金
2
歩
歩
金
銀
歩
歩
3
歩
歩
歩
歩
4
歩
歩
5
歩
歩
歩
歩
6
歩
歩
角
銀
歩
銀
桂
歩
7
金
金
8
香
桂
玉
飛
香
9
☗ pieces in hand: –
Position after move 29 of Momoko Katou (Black) vs Daisuke Nakagawa (White) August 25, 2017.
Rapid Attack Fortressedit
Rapid Attack Fortress strategies are characterized by the fact that White will start the fight following Black's blocking of the bishop's diagonal. These are active plans where White wants to avoid a development in which Black takes hold of the initiative. The side playing Fortress aims at building up a position wary of the rival's rapid attack. There are a number of variations:
Sitting King Bogin (or "Super Rapid Attack Bogin")
The rapid attack strategy will vary depending on whether in the fifth move Sente plays P-66 or S-77. For example, both Sitting King Bogin and Right Fourth File Rook are played following P-66, while Central Rook Fortress and Akutsu Rapid Attack Fortress are played following S-77. Yonenaga Rapid Attack Fortress can be played against either.
Lectures on the Latest Strategies: Lecture 2: Yagura
April 13, 2024
fortress, opening, double, fortress, variationafter, moves, pieces, hand, 987654321, 香桂, 桂香1, 金王, 2歩, 金銀歩歩3, 歩歩角歩歩歩, 歩歩歩, 6歩歩銀金, 歩銀歩歩7, 玉金角, 8香桂, 桂香9, pieces, hand, common, variation, both, players, kings, fully, inside, fortress, castles, black, advanced, the. Double Fortress variationafter 32 moves pieces in hand 987654321 香桂 桂香1 飛 銀 金王 2歩 歩 金銀歩歩3 歩歩角歩歩歩 4 5 歩歩歩 歩 6歩歩銀金 歩銀歩歩7 玉金角 飛 8香桂 桂香9 pieces in hand A common variation Both players kings are fully inside Fortress castles Black has advanced their right offensive silver to 37 while White s bishop is positioned on 64 Fortress 矢倉 or 櫓 yagura is both a Static Rook opening 矢倉戦法 yagura senpō and a castle in shogi It is usually played in a Double Static Rook opening which is often a Double Fortress opening However it may also occur in different Double Static Rook openings such as Fortress vs Right Fourth File Rook The Fortress castle 矢倉囲い yagura gakoi which is the defining characteristic of Fortress games was considered by many to be one of the strongest defensive positions in Double Static Rook games in the 1980s 1 The term yagura is the Japanese word for a tower like structure in traditional Japanese castles Contents 1 Double Fortress 2 Historical Fortress 3 vs Right Fourth File Rook 4 vs Snowroof 4 1 Rapid Attack Fortress 5 vs White s Left Mino 6 See also 7 References 8 Bibliography 9 External linksDouble Fortress editDouble Fortress pieces in hand 987654321 香桂 王 桂香1 飛 銀金 金 2歩 歩 銀歩歩3 歩歩角歩歩歩 4 5 歩歩歩 歩 6歩歩銀金 歩銀歩歩7 金角 飛 8香桂 玉 桂香9 pieces in hand Main article Double Fortress The most commonly encountered Fortress strategies occur in Double Fortress games where both players use a Fortress formation Historical Fortress editEarlier josekis for Fortress in the Edo period usually spelled 櫓 at that time were very different from the current josekis For instance in one variation it is White who delays pushing their rook pawn whereas Black delays the rook pawn push in the modern era and an early bishop trade occurs before both players kings are moved into their castles vs Right Fourth File Rook editFortress vs Right Fourth Rook pieces in hand 987654321 香桂 金王金銀桂香1 飛 角 2歩 歩 歩歩 歩歩3 歩 銀 歩 4 歩 5 歩歩歩 歩 6歩歩 銀歩歩 歩7 角金銀 飛 8香桂 玉 桂香9 pieces in hand Main article Fortress vs Right Fourth File Rookvs Snowroof editFortress vs Traditional Snowroof pieces in hand 987654321 香桂 角王 桂香1 飛 金 金 2歩 銀銀 歩歩3 歩歩歩歩歩 4 歩 歩 5 歩歩歩 6歩歩銀金銀歩歩 歩7 金角 飛 8香桂玉 桂香9 pieces in hand Position after move 32 in an Ōza match between Habu Black and Nakamura White on September 18 2013 The Snowroof strategy can be played against a Fortress opponent Modern Snowroof vs Fortress pieces in hand 987654321 香桂 王角桂香1 飛 銀 金 2歩 歩 金銀歩歩3 歩 歩歩歩 4 歩 歩 5 歩歩 歩歩 6歩歩角銀歩銀桂 歩7 金 金 8香桂 玉 飛香9 pieces in hand Position after move 29 of Momoko Katou Black vs Daisuke Nakagawa White August 25 2017 Rapid Attack Fortress edit Rapid Attack Fortress strategies are characterized by the fact that White will start the fight following Black s blocking of the bishop s diagonal These are active plans where White wants to avoid a development in which Black takes hold of the initiative The side playing Fortress aims at building up a position wary of the rival s rapid attack There are a number of variations Sitting King Bogin or Super Rapid Attack Bogin Right Fourth File Rook Central Rook Fortress Masuda Rapid Attack Fortress Yonenaga Rapid Attack Fortress Akutsu Rapid Attack Fortress also known as Nakahara Goda or Watanabe Rapid Attack Crab SilversThe rapid attack strategy will vary depending on whether in the fifth move Sente plays P 66 or S 77 For example both Sitting King Bogin and Right Fourth File Rook are played following P 66 while Central Rook Fortress and Akutsu Rapid Attack Fortress are played following S 77 Yonenaga Rapid Attack Fortress can be played against either vs White s Left Mino editFortress vs Left Mino pieces in hand 987654321 香桂 王金角桂香1 飛 銀 銀 2歩 歩歩 金 歩歩3 歩 歩歩歩 4 5 歩歩歩 歩 6歩歩銀金 歩 歩歩7 銀 飛 8香桂角金玉 桂香9 pieces in hand after 19 moves Fortress vs Left Mino pieces in hand 987654321 香桂 金 桂香1 飛 銀 銀王 2歩 歩 金 歩歩3 歩角歩歩歩 4 歩 5 歩歩歩 歩歩 6歩歩銀金 歩銀 歩7 玉金 飛 8香桂角 桂香9 pieces in hand after 31 moves 1 P 76 P 842 S 68 P 343 P 66 S 624 P 56 P 545 S 48 G61 526 G49 58 S 327 G 67 P 448 S 77 G 439 B 79 B 3110 P 36See also editFortress castle Fortress vs Right Fourth File Rook Static Rook Shogi openingReferences edit Fairbairn 1984 Bibliography editAono Teruichi 2009 1983 Better moves for better shogi Translated by Fairbairn John 2nd ed Ishi Press ISBN 978 4 87187 999 6 Fairbairn John 1981 How to play the fortress opening part 1 Shogi 29 4 6 Fairbairn John 1981 How to play the fortress opening part 2 Shogi 30 14 15 Fairbairn John 1984 Shogi for Beginners Ishi Press ISBN 978 4 8718 720 10 Hosking Tony 1996 The art of shogi The Shogi Foundation ISBN 978 0 95310 890 9 Kitao Madoka 2011 Joseki at a glance Translated by Kawasaki Tomohide Nekomado ISBN 978 4 9052 2501 0 Kitao Madoka 2013 Sabaki at a glance Translated by Kawasaki Tomohide Nekomado ISBN 978 4 9052 2510 2 External links editHow to Defend in Shogi by Yasuharu Ōyama Basic Formation 4 Yagura Basic Formation 5 Gin yagura YouTube Hidetchi s How to play Shogi 将棋 Lesson 14 Opening Principles Contains some discussion of Fortress opening from 2 min 28 sec Rapid Encountered Yagura Primitive Climbing Silver Shogifan 将棋ファン Yagura 1 矢倉 Shogi Openings professional Akira Nishio s blog About a Yagura castle Basic Tactics For Breaking Yagura Castle 1 Basic Tactics For Breaking Yagura Castle 2 Basic Tactics For Breaking Yagura Castle 3 Basic Tactics For Breaking Yagura Castle 4 Shogi Shack Yagura Intro Shogi Maze Yagura Opening Formation Yagura Strategy How To Build The Formation Shogi Opening Yagura Akutsu Style Pawn 55 Rapid Attack Yagura Time Lugging Climbing Silver Yagura 3 Move Bishop Strategy Yet Another Shogi Site Yagura Rapid Attack Yonenaga Fujimori style against P35 variation Double Yagura Identical formation 将棋タウン 矢倉戦法 Shogi Planet Yagura Static Bishop left Mino Castle Lectures on the Latest Strategies Lecture 2 Yagura Retrieved from https en wikipedia org w index php title Fortress opening amp oldid 1186570247, wikipedia, wiki, book, books, library,
