Hayakuri Gin in Ittezon Kakukawari ; part. 1

Shogi Opening traps;

Hayakuri Gin in Ittezon Kakukawari ; part 1.

(diagram 1)

1.P-7f P-3d
2.P-2f G-3b
3.P-2e Bx8h+
4.Sx8h S-2b
5.S-3h S-3c
6.P-3f S-6b
7.S-3g P-6d
8.S-4f S-6c
9.S-7g S-5d
(diagram 1)





In the diagram 1 , Sente has made "Hayakuri Gin" formation ; S-4f , but if he wants to start attacking with P-3e , he must move K-6h or P-1f before attacking . Why he needs such a move .

If he starts attacking 10.P-3e , the game will advance like following moves .

(diagram 2)

10. P-3e? Px3e
11. Sx3e P*3d
12. P-2d Px2d
13. Sx2d Sx2d
14. Rx2d B*1e
(diagram 2)









Then Gote gets a fork on King and Rook . In the diagram 2 , Sente has a lost position .
This is because , Sente must move K-6h or P-1f . By these moves , Sente can avoid this line .

(diagram 3)

10. P-3e? Px3e
11. Sx3e P*3d
12. S-4f P-4d
(diagram 3)











In addition to shown above , Sente can avoid this fork on King and Rook by 12.S-4f . But we think this line isn't good . Because Sente has started attacking once , but he gets no effective result but one Pawn in hand . And Gote will get better position with "Koshikakegin" formation . Sente can't attack any more .