27th Kio Match Game 4

Black: Habu Yoshiharu, Kio
White: Sato Yasumitsu, Challenger
27th Kio-sen, Game 4, March 8th 2002
1.P7g-7f     00:00:00  00:00:00
2.P8c-8d     00:00:00  00:01:00
3.P2g-2f     00:02:00  00:01:00
4.G4a-3b     00:02:00  00:02:00
5.G6i-7h     00:02:00  00:02:00
6.P8d-8e     00:02:00  00:02:00
7.B8h-7g     00:02:00  00:02:00
8.P3c-3d     00:02:00  00:02:00
9.S7i-8h     00:02:00  00:02:00
10.B2bx7g+   00:02:00  00:02:00
11.S8hx7g    00:02:00  00:02:00
12.S3a-4b    00:02:00  00:02:00
13.S3i-3h    00:03:00  00:02:00
14.S7a-7b    00:03:00  00:02:00
15.P9g-9f    00:05:00  00:02:00
16.P9c-9d    00:05:00  00:02:00
17.P4g-4f    00:06:00  00:02:00
18.P6c-6d    00:06:00  00:02:00
19.S3h-4g    00:06:00  00:02:00
20.S7b-6c    00:06:00  00:02:00
21.K5i-6h    00:10:00  00:02:00
22.P1c-1d    00:10:00  00:02:00
23.P1g-1f    00:11:00  00:02:00
24.K5a-4a    00:11:00  00:02:00
25.G4i-5h    00:14:00  00:02:00
26.S6c-5d    00:14:00  00:06:00
27.P3g-3f    00:17:00  00:06:00
28.G6a-5b    00:17:00  00:07:00
29.N2i-3g    00:19:00  00:07:00
30.P4c-4d    00:19:00  00:07:00
31.S4g-5f    00:20:00  00:07:00
32.K4a-3a    00:20:00  00:09:00
33.K6h-7i    00:21:00  00:09:00
34.P7c-7d    00:21:00  00:24:00
35.P2f-2e    00:28:00  00:24:00
36.S4b-3c    00:28:00  00:24:00
37.P6g-6f    00:28:00  00:24:00
38.N8a-7c    00:28:00  00:24:00

A classic position: the Kakugawari Koshikakegin (Bishop Exchange 
Reclining Silver). This opening was very popular about seven years 
ago and has been played in hundreds of professional games. It has 
been studied very deeply and the general conclusion seems to be that 
black has the better chances. The vital question therefore was: what 
did Sato prepare?

39.P4f-4e    00:37:00  00:24:00
40.P4dx4e    00:37:00  00:24:00
41.P3f-3e    00:37:00  00:24:00
42.S3c-4d    00:37:00  00:31:00
43.P1f-1e    00:42:00  00:31:00
44.P1dx1e    00:42:00  00:31:00
45.P7f-7e    00:42:00  00:31:00
46.P7dx7e    00:42:00  00:31:00
47.P2e-2d    00:42:00  00:31:00
48.P2cx2d    00:42:00  00:31:00
49.R2hx2d    00:42:00  00:31:00
50.P*2c      00:42:00  00:31:00
51.R2d-2i    00:42:00  00:31:00
52.G5b-6c    00:42:00  00:34:00
53.P*1b      00:51:00  00:34:00
54.L1ax1b    00:51:00  00:34:00
55.B*1a      00:51:00  00:34:00

Diagram 1

A position that has been played numerous times. There are two ways to 
continue from here: 56.Sx3e and 56.B*2b. The latter is considered the 
better move.

56.S4dx3e    00:51:00  00:47:00

This move is judged inferior in opening books like "Habu's brain" 
and "Kakugawarikoshikakegin kenkyu".

57.S5fx4e    01:04:00  00:47:00
58.B*2b!?    01:04:00  00:57:00

Here is Sato's new move. Here only 58.B*3h has been played. The 
combination of the two moves Sx3e and B*2b is a new plan. This 
position is quite dangerous for white and it is a sign of supreme 
confidence in his homework that Sato dared to play this plan in such 
an important game.

59.P*3c      02:22:00  00:57:00
60.G3bx3c    02:22:00  02:08:00
61.B1ax2b+   02:26:00  02:08:00
62.K3ax2b    02:26:00  02:08:00
63.S4ex5d    02:26:00  02:08:00

A change of plan. Habu initially thought that 63.N2e would be good 
for him. This is true after both 64.G3b Sx3d and 64.G4c B*4a, but 
after 64.G2d Sx5d Px5d black has no good move.

64.P5cx5d    02:26:00  02:12:00
65.N3g-4e    02:41:00  02:12:00
66.G3c-3b    02:41:00  02:21:00
67.B*4a      02:51:00  02:21:00

Diagram 2

This threatens both Bx6c+ and S*4c. The position is very close. Can 
black continue his attack or is white able to stop it and win in the 
counter attack.
 
68.B*7d      02:51:00  02:34:00

The only move.

69.R2i-2h!   02:58:00  02:34:00

Inviting the following move.

70.R8b-4b    02:58:00  03:10:00

This kills the black bishop and most of the commentators in the press 
room thought that black's attack would die.

71.S*1a!     02:59:00  03:10:00

Diagram 3

Habu continues to find moves to fuel his attack. He played this after 
only one minute of thought, so this must have been according to plan.

72.K2b-3a?   02:59:00  03:21:00

A position as close as this can be decided by one mistake. In the 
press room 72.Kx1a was thought as good for white after 73.Bx3b+ 
74.Rx3b 75.Rx2c+ 76.R2b, but things are not so easy for white 
after 77.+Rx3d. For example 78.R2i+ P*3i or 78.B*2e by 79.+Rx3e 
Bx5h+ G*3c! and now R2i+ K8h S*6i S*2b +Rx2b Gx2b Kx2b P*2c K1a 
R*7i is winning for black and +Bx5g K8h +Bx3e P*2c is not completely 
clear. Still, Sato should have tried this, as 72.K3a doesn't give 
him a chance to win.

73.B4ax6c+   03:04:00  03:21:00
74.B7dx6c    03:04:00  03:21:00
75.N4e-5c+   03:04:00  03:21:00
76.R4b-4i+   03:04:00  03:21:00
77.K7i-8h    03:04:00  03:21:00
78.P7e-7f    03:04:00  03:27:00
79.S7gx7f    03:09:00  03:27:00
80.B*5e      03:09:00  03:42:00

Diagram 4

Attack and defense, but Habu has seen it all.

81.G5h-4h!   03:33:00  03:42:00

Now the white promoted rook doesn't work in defense anymore. White 
can't afford to exchange rooks here, so...

82.+R4i-5i   03:33:00  03:57:00
83.R2hx2c+!  03:36:00  03:57:00

After the game Habu said he thought he had won here. This rook can 
of course not be taken (Gx2c G*4b mate) and despite the fact that 
this is not a mating threat, white has no way to continue his attack 
here.

Diagram 5

84.B5ex1a    03:36:00  03:59:00
85.G*4b      03:40:00  03:59:00
86.G3bx4b    03:40:00  03:59:00
87.+N5cx4b   03:40:00  03:59:00
88.K3ax4b    03:40:00  03:59:00
89.G*5c      03:40:00  03:59:00
90.K4b-5a    03:40:00  03:59:00
91.+R2cx2a   03:40:00  03:59:00
92.P*4a      03:40:00  03:59:00
93.N*4c      03:40:00  03:59:00
94.K5a-6a    03:40:00  03:59:00
95.G5cx6c    03:40:00  03:59:00
96.B1ax6f    03:40:00  03:59:00
97.P*7g      03:40:00  03:59:00
Resigns      03:40:00  03:59:00

Final Diagram

Black has multiple mating threats (+Rx4a and B*8c) and white has no 
mate. A fine attacking win by Habu to defend his Kio title. He has 
now won this title for the 12th consecutive time, getting close to 
Oyama's all-time record of 13 consecutive Meijin titles. In those 
twelve Kio matches he lost only eight games and in the Kio he 
currently has a winning streak with the black pieces of 24 games.