Itō's Pinwheel (伊藤流風車)
☖ pieces in hand: –
987654321 
         1
         2
         3
         4
   歩 桂   5
歩 歩 歩歩歩 歩6
 歩桂銀 銀   7
  金 金玉   8
香      飛香9
☗ pieces in hand: 角

In shogi, the Pinwheel (風車 kazaguruma) is an uncommon opening with the rook on the bottom rank 9 enabling it to switch between a Ranging Rook and Static Rook attack.

The pinwheel name comes from the way the king is able to rotate around the gold positioned on the 58 square as if it were a wheel.

Against Static Rook Anaguma

Example of development from Habu (1992).

1. P-76 P-84

2. S-68 P-34

3. P-66 S-62

4. R-58 K-42

5. K-48 K-32

6. K-38 B-33

7. P-56 P-54

8. S-48

8... K-22

9. S-66 S-53

10. P-46 L-12

11. P-36 K-11

12. S-47 S-32

13. G-48 P-85

14. B-77 G-52

15. N-37 P-44

16. P-55

16... Px55

17. Rx55 P*54

18. R-59 G-43

19. P-16 P-14

20. P-26 G-31

21. G-78 P-74

22. B-68 P-94

23. P-96 R-72

24. G-77 P-75

Central Rook Pinwheel
☖ pieces in hand: 歩
987654321 
香桂    金桂王1
  飛    銀香2
   歩銀金角歩 3
歩   歩歩歩 歩4
 歩       5
歩 歩歩 歩歩歩歩6
 歩金銀 銀桂  7
   角 金玉  8
香桂  飛   香9
☗ pieces in hand: 歩

25. Px75 Rx75

26. P*76 R-72

Game example

Ōyama vs Ariyoshi 1991
☖ pieces in hand: 歩
987654321 
香桂    金桂王1
  飛    銀香2
歩  歩銀金角歩 3
    歩歩歩 歩4
 歩 歩     5
歩 歩 銀歩歩 歩6
 歩角金 銀桂歩 7
     金玉  8
香桂  飛   香9
☗ pieces in hand: 歩
up to move #51

A similar position occurs in a 1991 game between Yasuharu Ōyama (Black) and Michio Ariyoshi (White).

Itō's Pinwheel variations

Bibliography

  • 羽生 [Habu], 善治 [Yoshiharu]. 1992 [2010]. 居飛車穴熊vs中飛車. 羽生の頭脳: 居飛車穴熊と左美濃 (Vol. 4, Chap. 3). 日本将棋連盟.
  • 伊藤 [Itou], 果 [Hatasu]. 1994. 風車の美学: 伊藤果直伝! 毎日コミュニケーションズ. ISBN 4-89563-601-1


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