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41st Oi-sen, game 4
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17 September 2000
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Black is power
To play through the game in a Java viewer, click
here.
Black: Tanigawa Koji, Challenger
White: Habu Yoshiharu, Oi
41st Oi-sen, Game 4, August 21st and 22nd 2000
Notes by Reijer Grimbergen
1.P7g-7f
2.P8c-8d
3.P2g-2f
4.G4a-3b
5.G6i-7h
6.P8d-8e
7.B8h-7g
8.P3c-3d
9.S7i-8h
10.B2bx7g+
11.S8hx7g
The first three games of this match saw Habu playing Shikenbisha, so his choice of opening in this game was a little surprising. However, his strategy in game 2 was a failure, so trying something else was necessary. Still, Tanigawa is almost unbeatable in the Kakugawari, so the interesting question
was if Habu had found something new to fight it.
12.S3a-4b
13.S3i-3h
14.S7a-7b
15.P9g-9f
16.P9c-9d
17.P4g-4f
18.P6c-6d
19.S3h-4g
20.S7b-6c
21.K5i-6h
22.P1c-1d
23.P1g-1f
24.G6a-5b
25.S4g-5f
26.S6c-5d
27.G4i-5h
28.P6d-6e
29.P3g-3f
30.K5a-4a
31.N2i-3g
32.K4a-3a
33.K6h-7i
34.P4c-4d
35.K7i-8h
36.K3a-2b
37.G5h-4h
38.S4b-3c
39.R2h-2i
40.B*6d
It seems that the P6e pawn push followed by this bishop drop is what Habu had in mind. He had judged that it would be difficult for Tanigawa to attack. After 41.G4g P7d followed by N7c, white would get a satisfactory position...
41.N3g-2e!
Tanigawa shows that Habu's judgement was wrong. He sacrifices a knight for a strong (perhaps already decisive) attack.
42.S3c-4b
Habu had planned 42.S2d, but here he realized that he would be in
trouble after 43.P4e Px4e P6f. Unfortunately for him, 42.S4b is not much better.
43.P4f-4e
44.P2c-2d
45.P4ex4d
46.P2dx2e
This gives black a very strong attacking base on the head of the king, but if white does not take the knight and plays the quiet move 46.P7d, the black gets a clear advantage after 47.P1e Px1e P*1c G2c B*4a. Without the pawn on 7d, white would be able to win this bishop with G5a.
47.P2fx2e
48.S4b-3c
49.P2e-2d
50.S3cx4d
51.B*3g
52.B6dx3g+
53.G4hx3g
54.G5b-4b
55.P1f-1e
56.P1dx1e
57.P*1c?
Natural move, but wrong. Tanigawa could have decided the game very quickly by 57.B*2c, which white can not answer with 58.G3b-4c, as black wins in all variation after 59.P*4c: 1) 60.Sx4c P*4e, 2) 60.G4b-4c B4a+ or 3) 60.G3cx4c P*1b.
58.P*2e
59.L1ix1e
60.B*4h!
This is the start of white's counterattack and slows down black's attack as well. Habu thought that he would lose quickly, but here he suddenly saw a way to fight for his life.
61.B*4f
62.P*4e
63.R2i-4i
64.P4ex4f
65.R4ix4h
66.B*5i
67.R4h-1h
68.B5ix3g+
69.P1c-1b+
70.K2b-3c
71.L1e-1c+
72.K3c-4c
73.P2d-2c+
74.P4f-4g+
75.+P2cx3b
76.G4bx3b
77.R1h-1g
78.G*2g
79.B*6a
80.N*5b
81.R1gx2g?!
A decision based on probably the only flaw in Tanigawa's game: he hates it when his opponent can make an entering king. Objectively best would probably have been 81.R1d +Px5g R2d N1c R2a+ +Px5f. After this, white has enough safe territory at the head of the king to enter. However, the problem is that the rook on 8b will is hard to save. In this case, white would probably not have enough points to finish the game with jishogi. Habu: "I thought I could enter, but I did not know if I would have enough points". Tanigawa decides to live or die by his attack. The game now has become very close and it is completely unclear who will win.
82.+B3gx2g
83.+P1b-2b
84.G3b-4b
85.G*3b
86.G4bx3b
In the press room it was thought that 86.P*4a was better, but Habu saw that after 87.Gx4b Px4b G*7b R9b P*4e +Bx3f Bx5b+ Kx5b Px4d the white king would not be able to escape.
87.+P2bx3b
88.K4cx3b
89.G*7b
90.R8b-9b
91.B6ax5b+
92.L1ax1c
93.+B5bx3d
94.G*4c
95.G*2c
96.K3b-4b
97.+B3d-2d
98.G4c-3c
99.N*3d
100.K4b-5b
101.G2cx3c
102.S4dx3c
103.+B2dx3c
104.N2ax3c
105.G*8c
106.B*1g!
Great defence.
107.G8cx9b?
Better would have been to close the escape route up the board with 107.P*4d Bx4d+ and only then 109.Gx9b and after +Bx3d S*3b black might still have the edge.
108.K5b-4c
109.R*2d
110.+B2gx3f?
A rare endgame mistake by Habu. If he would have played 110.K4d then after 111.N4b+ G*3d! he would have won. Habu said he had only looked at 112.P*3d, which loses after P*4e Nx4e R2c+.
111.N3d-4b+
112.K4cx4b
113.P*4d
114.N*3b
115.R2d-2c+
116.B1gx4d+
117.G7b-6b
118.+P4gx5g
119.P*3d
120.R*4h?
Attack and defence and therefore a natural looking move. However, this is the losing move. Habu could still have made things very difficult with 120.+B6i. If black than plays the same variation as in the game, white can still win with +Bx7h in the end.
121.P*4c
122.S5dx4c
123.P3dx3c+
124.+B4dx3c
125.S*5a
Resigns
Time: 07:57:00 07:59:00
After 126.K3a +Rx3c white has no mate and no defence. A very exciting game that could have been over very quickly. Habu showed some uncharacteristic mistakes in the endgame that gave Tanigawa the chance to win. Maybe the hard schedule that Habu has had so far in this season is taking its toll.
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