Ishida (shogi)

Ishida vs Static Rook

☖ pieces in hand: –

9	8	7	6	5	4	3	2	1
香	桂				金		桂	香	1
	飛			金			王		2
		歩	銀	歩	歩	角	銀		3
歩			歩			歩	歩	歩	4
	歩	歩							5
歩		飛	歩	銀				歩	6
角	歩	桂		歩	歩	歩	歩		7
				金		銀	玉		8
香					金		桂	香	9

☗ pieces in hand: –

(with Mino castle)

In shogi, Ishida (石田流 ishida-ryū or 石田流三間飛車 ishida-ryū sankenbisha) is a major type of variations of the Third File Rook opening.

In contrast to other Third File Rook openings, Ishida advances the seventh file pawn to the middle rank 5 if played by Black (P-75) or the third file pawn if played by White (P-35). This allows the player's rook to be move up the 76 square (Black) or the 34 square (White).

History

Hironiwa vs Ishida 1649

☖ pieces in hand: 歩

9	8	7	6	5	4	3	2	1
香	桂	銀	金				桂	王	1
		王		金			角		2
歩	歩	歩	歩	歩	銀		歩		3
					歩	飛		歩	4
									5
歩		歩	歩	歩				歩	6
	歩				歩	歩	歩		7
	角	銀		飛	銀	金	玉		8
香	桂		金				桂	香	9

☗ pieces in hand: –

The variation is said to have originated with a blind shogi player from the middle of the Edo period named Kengyo Ishida. Although records of Ishida's actual games still exist, all of them end in Ishida's loss. An extant game record of a Double Ranging Rook game in 1649 features an Ishida position played by Kengyo Ishida is shown in the accompanying diagram.

The renaissance of the Ishida variations occurred in the 1970s thanks to a development of the original strategy by the well known shogi master Kōzō Masuda, in what is called now Masuda's Ishida (升田式石田流 Masuda-shiki Ishida-ryū). Further developments occurred in the 2000s with professional player Daisuke Suzuki creating the New Quick Ishida variation in 2004, Kenji Imaizumi developing the 1... R-32 opening in 2007, and Toshiaki Kubo adding new moves in 2008. The strategies have enjoyed renewed interest among professional players since 2011.

Ishida Development

Real Ishida formation

☖ pieces in hand: –

9	8	7	6	5	4	3	2	1
									1
									2
									3
									4
		歩							5
歩		飛	歩						6
角	歩	桂							7
									8
									9

☗ pieces in hand: –

Ishida Third File Rook uses a particular piece formation not found in other Third File Rook positions. In this structure, an early bishop exchange is prevented. Thus, it is known as a slow game (持久戦 jikyūsen).

This contrasts with Quick Ishida (haya ishida) where the possibility of a bishop exchange remains throughout the opening – a rapid attack game (急戦 kyūsen). When referring specifically to the slow Ishida variant, the term 石田流本組 ishida-ryū hom gumi is used in Japanese, which is translated as Real Ishida by Fairbairn and Ishida Plenary Formation by Kawasaki (Kitao 2011). Hosking refers to this simply as Ishida while the fast game is called Ishida Quick Attack.

Ishida vs Static Rook Anaguma

☖ pieces in hand: –

9	8	7	6	5	4	3	2	1
香	桂		金		金		桂	王	1
	飛						銀	香	2
		歩	歩	銀	歩	角	歩	歩	3
歩				歩		歩			4
	歩	歩							5
		飛	歩						6
歩	歩	桂	銀	歩	歩	歩	歩	歩	7
			角			銀	玉		8
香			金		金		桂	香	9

☗ pieces in hand: –

Ishida, B68 variation

Said to be the ideal formation for ranging rook, it appears also in those cases in which the rook doesn't move to the 3rd file from the start (e.g., in Fourth File Rook or Twisting Rook). The Ishida opening is also considered the ideal formation in a game with a lance handicap. It is also popular as a potent countermeasure against Static Rook Anaguma due to the versatility of its attack, with the left gold moving to 78 to improve the build up , and to reinforce the weak point created by attacking from the 7th file.

Ishida vs Static Rook Anaguma

☖ pieces in hand: –

9	8	7	6	5	4	3	2	1
香	桂				金	金	桂	王	1
			銀				銀	香	2
		歩	歩		歩	角	歩	歩	3
歩	飛	歩		歩		歩			4
	歩								5
		飛	歩	歩					6
歩	歩	桂	銀	角	歩	歩	歩	歩	7
		金				銀	玉		8
香					金		桂	香	9

☗ pieces in hand: –

See also

• Quick Ishida
• Third File Rook
• Ranging Rook

Bibliography

• Fairbairn, John (1986). Shogi for beginners (2nd ed.). Ishi Press. ISBN 978-4-8718-720-10. {{cite book}}: Invalid |ref=harv (help)
• Hosking, Tony (1996). The art of shogi. The Shogi Foundation. ISBN 978-0-95310-890-9. {{cite book}}: Invalid |ref=harv (help)
• Kitao, Madoka (2011). Joseki at a glance. Translated by Kawasaki, Tomohide. Nekomado. ISBN 978-4-9052-2501-0. {{cite book}}: Invalid |ref=harv (help)
• Kitao, Madoka (2013). Sabaki at a glance. Translated by Kawasaki, Tomohide. Nekomado. ISBN 978-4-9052-2510-2.
• 勝又清和 (2003). 消えた戦法の謎 (文庫版 ed.). 毎日コミュニケーションズ. ISBN 4-8399-1091-X. - 1995年のものの加筆・文庫版
• 久保利明 (2011). 久保の石田流. 日本将棋連盟. ISBN 978-4-8399-3725-6.
• 森下卓 (1997). 将棋基本戦法 振り飛車編. 日本将棋連盟. ISBN 4-8197-0334-X.
• 鈴木大介 (2011). 勝てる石田流. 創元社. ISBN 978-4-422-75133-7.
• 小倉久史 (2006). 下町流三間飛車 居飛穴攻略の新研究. 毎日コミュニケーションズ. ISBN 4-8399-2052-4.

External links

• Lectures on the Latest Strategies: Lecture 7: Ishida
• Shogi Opening:
  • 3rd File Rook: Plenary Ishida Style vs Climbing Gold (Not Exchange Bishop Type)
  • 3rd File Rook: Plenary Ishida Style vs Left Mino
• Yet Another Shogi Site: Gote Ishida Style (Countermeasures)
• Shogi Planet ([1]) (Evernote documents):
  • 3rd File · Ishida N-77 variation
  • 3rd File · Ishida B-77 variation
  • 3rd File · Ishida vs Climbing Gold variation
• コンピュータ将棋研究Blog: 最強の証明―石田流本組み破りponanza流☖６三金型 · the Ponanza computer shogi engine's Counter-Ishida Static Rook variation