Sleeve Rook

In shogi, Sleeve Rook or Right Third File Rook or Sideways Rook or Sidestepped Rook (袖飛車 sodebisha) is a Static Rook opening in which the rook is moved to the third file if played by Black or the seventh file if played by White.

Sleeve Rook
☖ pieces in hand: –
987654321 
香桂銀金王金銀桂香1
 飛     角 2
歩歩歩歩歩歩 歩歩3
      歩  4
         5
      歩  6
歩歩歩歩歩歩 歩歩7
 角    飛  8
香桂銀金玉金銀桂香9
☗ pieces in hand: –

Aside from being its own opening, a Sleeve Rook formation is used in some variations of several different openings. For instance, there are Sleeve Rook variations of the Double Fortress and of different Static Rook vs Ranging Rook openings.

History
Hon'inbō vs Ōhashi 1614
position after 28 moves
☖ pieces in hand: –
987654321 
香  金王金 桂香1
 飛     角 2
  桂 銀銀 歩 3
歩 歩歩歩歩歩 歩4
 歩       5
歩 歩銀歩歩歩 歩6
 歩角歩 銀 歩 7
  金   飛  8
香桂  玉金 桂香9
☗ pieces in hand: –

The Sleeve Rook opening is one of the oldest shogi openings appearing around the same time as the Black's Static Rook vs White's Traditional Ranging Rook type of openings and the Wrong Diagonal Bishop (thus predating other old openings such as Fortress, etc).[1]

The adjacent diagram shows a game from 1614 between Sansa Hon'inbō (Black) and Sōkei Ōhashi I (White), the first Meijin. Hon'inbō is playing a Sleeve Rook position against Ōhashi's Static Rook.[2]

gollark: The manual says something about finalizers, thus ħmm.
gollark: However, that's not actually better.
gollark: Fascinating.
gollark: If you want to gaze upon the full glory of my code, do so.
gollark: I might just have to find one of the nim communities™.

See also

Bibliography
  • Hosking, Tony (1996). The art of shogi. The Shogi Foundation. ISBN 978-0-95310-890-9.CS1 maint: ref=harv (link)

References
  1. Hodges, George, ed. (1977). "Shogi openings". Shogi (10): 9, 12–13.
  2. https://shogidb2.com/games/f729f6efee0b825888dc4f18882b483e730553cf
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