Gote Gokigen Nakabisha vs Sente Ibsiha Anaguma ; unorthodox line

Shogi Game record : The 4th Asahi cup Shogi open ; 1st pre-round


A shogi game of The Asahi cup Shogi open 1st pre-round between KOYAMA (amateur) and SUGAI started 2:00 P.M. (JST) , 3 July 2010 .

You can see the original game record on the Net .
http://live.shogi.or.jp/asahi/archives/4/kifu/20100703asahi_17.html?TB_iframe=true&width=600&height=570
(Flash version , written in Japanese language)


Sente : KOYAMA Reo (amateur)
Gote : SUGAI Tatsuya (4 dan)

(diagram 1)

1.P-7f P-3d
2.S-4h P-5d
3.K-6h P-5e
4.K-7h R-5b
5.S-6h B-3c
6.P-4f S-4b
7.S-4g K-6b
8.S-7g S-5c
9.S-6f S-6d
10.R-5h K-7b
11.P-5f Px5f
12.Sx5f K-8b
13.P*5e S-7b
14.G4i-5i P-3e
15.S-4e B-2b
16.P-5d R-5a
17.G5i-6h G-4b
18.S-3d G-3b
19.B-7g P*5c
20.Px5c+ Sx5c
21.S-4e P*5d
22.K-8h G-4b
23.S-3d G-3b
24.G6i-7h P-6d
25.S-4e G-4b
26.L-9h P-9d
27.K-9i P-6e
(diagram 1)

KOYAMA developed his camp without pushing the 2nd file Pawn . SUGAI selected Gokigen Nakabisha in this game .

SUGAI advanced the 5th file Pawn with 3...P-5e making Gosuji Kuraidori Nakabisha formation . KOYAMA advanced his both Silver and ranged the Rook to get back the Kurai of the 5th file until 13.P*5e .

Both players slowly developed their each camp . SUGAI made Kata mino gakoi and KOYAMA started making Ibisha Anaguma . Replying KOYAMA's 27.K-9i , SUGAI pushed the 6th file Pawn to start attacking .

(diagram 2)

28.Sx6e Bx7g+
29.Nx7g B*4g
30.R-5i P-4d
31.S4e-5f B-3h+
32.P-6f P-3f
33.Px3f +Bx2g
34.P-7e P*6d
35.S-7f +B-2h
36.P-8f +Bx1i
37.R-8i +Bx4f
38.S5f-6g R-3a
39.P-8e Rx3f
40.P-8d Px8d
41.P*8c Kx8c
42.P*8e K-8b
43.Px8d P*8h
(diagram 2)

After the Bishop exchange , SUGAI dropped his one with 29...B*4g and made it promoted with 31.B-3h+ .

KOYAMA advanced the Pawns in 7th & 8th file , and ranged the Rook with 37.R-8i to attack SUGAI's Kakoi . KOYAMA attacked SUGAI's Kakoi for a while , but SUGAI's Pawn drop ...P*8h was too effective counter-attack for KOYAMA .

(diagram 3)

44.Kx8h L*8f
45.S-8g Lx8g+
46.Kx8g P*8f
47.Kx8f P*8e
48.Nx8e P*8c
49.Px8c+ Sx8c
50.P*8d Sx8d
51.K-7g P*8f
52.Rx8f P*8c
53.L*7f G-6b
54.P-9f P-6e
55.P*4g +B-6d
56.Px6e +B-5e
57.K-8g R-3i+
58.G6h-7g +R-8i
59.G-8h +Bx7g
60.Kx7g +R-7i
61.S-7h Sx8e
62.Rx8e N-9c
63.R-8f N*8e
64.K-8g S*7g
65.S*8i G*6g
66.P-9e Sx8h+
67.resigns
(diagram 3)

After 132 moves , SUGAI won the game .