Shogi News : ISHIBASHI lost by her illegal move . (Jo-ryu Oi )

Shogi News : The 20th Jo-ryu Oi sen : 5 games title matcch

The 2nd game of the 20th Jo-ryu Oi sen title match between ISHIBASHI and SHIMIZU started the morning of 14 October 2009 at Sapporo city , Hokkaido .


Jo-ryu Oi sen main site
http://www5.hokkaido-np.co.jp/20joryu/
(written in Japanese language)

You can see the original game record on the Net .
http://www.hokkaido-np.co.jp/cont/20joryu-2/72187.html
(Flash version , written in Japanese language)
http://www.hokkaido-np.co.jp/cont/20joryu-2/72183.html
(Java version , written in Japanese language)


Sente : ISHIBASHI Sachio (Jo-ryu Oi)
Gote : SHIMIZU Ichiyo (Jo-ryu Meijin , Jo-ryu Osho)

(diagram 1)

1.P-7f P-3d
2.G4i-5h P-8d
3.P-6f P-8e
4.B-7g P-5d
5.G-6g S-3b
6.S-8h S-6b
7.B-6h S-5c
8.P-2f P-5e
9.S-4h S-5d
10.P-4f P-4d
11.S-4g K-4b
12.G-7h S-3c
13.K-6i K-3b
14.K-7i B-3a
15.S-7g K-2b
16.P-5f Px5f
17.R-5h R-5b
18.Sx5f P*5e
19.S-4g G6a-5a
20.P-3f G5a-4b
21.P-1f P-1d
22.K-8h G-4c
23.N-3g P-7d
24.P-9f G-3b
25.R-3h R-8b
26.P-4e
(diagram 1)

After both players opened the Bishop line , ISHIBASHI moved up her right Gold with 2.G4i-5h . This opening is sometimes seen in TANAKA Torahiko's game . In stead of 2.G4i-5h , 2.P-2f or 2.P-6f is more popular for Ibisha player . Perhaps ISHIBASHI wanted to avoid SHIMIZU's Yokofutori or Migi Shiken Bisha .

Replying 2.G4i-5h , SHIMIZU advanced the 8th file Pawn . While SHIMIZU advanced the Pawn to 8e , ISHIBASHI closed the Bishop line with 3.P-6f and moved up the Bishop with 4.B-7g to decline the 8th file Pawn exchange .

ISHIBASHI moved up the 5h-Gold with 5.G-6g to protect the 6f-Pawn , and preparing making Yagura gakoi . SHIMIZU advanced the 5th file Pawn and moved up right Silver to support the Pawn .

While SHIMIZU was making her Kakoi , ISHIBASHI completed Yagura gakoi and started exchanging the 5th file Pawns . During these moves , ISHIBASHI turned her Rook to 5h to add a piece in the 5th file . SHIMIZU's Rook also came to the 5th file defending here .

After the 5th file Pawn exchange , ISHIBASHI was making her attacking formation . During ISHIBASHI's building , SHIMIZU was also making her Yagura gakoi . SHIMIZU cost one more move in the right Gold's move , but one less move in Bishop's move .

After both players' King entered the Kakoi , ISHIBASHI started attacking with 26.P-4e .

(diagram 2)

26...Px4e
27.P-3e Px3e
28.Bx3e S-4d
29.B-6h P*3e
30.P-1e Px1e
31.P*4f Px4f
32.Sx4f P-2d
33.P*1b Lx1b
34.Sx3e P*3f
35.P-2e B-5c
36.Sx4d Gx4d
37.Px2d Px3g+
38.Rx3g P*3e
39.P*1c Nx1c
40.Lx1e S*2f
41.R-4g P*4e
42.Lx1c+ Lx1c
43.N*2e G-3d
44.P*3c G3bx3c
45.Nx3c+ Kx3c
(diagram 2)

After sacrificing the 4th file Pawn to open the Bishop line , ISHIBASHI exchanged the 3rd file Pawns threatening the Bishop promotion into 7a . SHIMIZU blocked the Bishop line with 28...S-4d attacking the 3e-Bishop .

ISHIBASHI once backed her Bishop with 29.B-6h and SHIMIZU dropped a Pawn with 29...P*3e to block ISHIBASHI's Bishop line . Sacrificing the 1st file Pawn , ISHIBASHI continued attacking .

Until 45...Kx3c , ISHIBASHI seemed to get a slight advantage .

(diagram 3)

46.P*5f P-8f
47.Sx8f N*9d
48.Px5e Sx5e
49.S*5d B-3a
50.P*3b B-6d
51.P-6e B-7c
52.Sx6c+ B-8d
53.B-7g N*6f
54.S-8e Nx7h+
55.Kx7h P*6f
56.Sx8d Px6g+
57.Rx6g P*6f
58.Rx6f Sx6f
59.G*2c K-4c
60.Bx6f R*5h
61.N*6h P*6g
62.P*4d K-4b
63.S*5c K-4a
64.P-3a+ Kx3a
65.B-2b+???
(diagram 3)

6:53 P.M. 14 October 2009 , ISHIBASHI moved 65.B-2b+??? . But this is an illegal move and she lost the game .