64th Meijin Match Game 1

[Black "Tanigawa Koji, Challenger"]
[White "Moriuchi Toshiyuki, Meijin"]
[Event "64th Meijin-sen, Game 1"]
[Date "April 11th and 12th 2006"]
1.P2g-2f     00:01:00  00:00:00
2.P3c-3d     00:01:00  00:02:00
3.P7g-7f     00:04:00  00:02:00
4.G4a-3b     00:04:00  00:03:00
5.G6i-7h     00:17:00  00:03:00
6.P8c-8d     00:17:00  00:03:00
7.P2f-2e     00:19:00  00:03:00
8.B2bx8h+    00:19:00  00:04:00

The popular Kakugawari with tempo loss. This is the first time that Moriuchi 
and Tanigawa have played this opening against each other but that is not a 
real surprise. The last time they played each other was more than a year ago, 
before this opening suddenly became popular. Of course, both players have 
played this opening in important games. Moriuchi played it in the Kio match 
and Tanigawa played it in the Meijin play-off game. Before the start of the 
Meijin match, everyone expected to see this opening at least once.

9.S7ix8h     00:19:00  00:04:00
10.S3a-2b    00:19:00  00:04:00
11.S3i-3h    00:28:00  00:04:00
12.S2b-3c    00:28:00  00:05:00
13.P1g-1f    00:59:00  00:05:00
14.P1c-1d    00:59:00  00:10:00
15.P3g-3f    01:18:00  00:10:00
16.S7a-6b    01:18:00  00:14:00
17.S3h-3g    01:28:00  00:14:00
18.P6c-6d    01:28:00  00:16:00
19.S3g-4f    01:46:00  00:16:00
20.S6b-6c    01:46:00  00:17:00
21.P3f-3e    02:04:00  00:17:00

Diagram 1

This early attack is being played a lot these days, most recently in the Ryu-O 
qualification game between Moriuchi and Habu played 4 days before this game. 
The position was not identical, with Moriuchi and Habu pushing the pawns on the 
9th file, but the idea is the same: attack early to take advantage of the extra 
move that black has. Moriuchi won the game against Habu with black, so it would 
be interesting to see how he would play this position from the other side.

22.P3dx3e    02:04:00  00:23:00
23.S4fx3e    02:10:00  00:23:00
24.S6c-5d    02:10:00  00:26:00
25.S8h-7g    02:29:00  00:26:00
26.P8d-8e    02:29:00  00:54:00
27.P7f-7e    03:27:00  00:54:00
28.P6d-6e    03:27:00  02:29:00

In the morning this game proceeded at a high pace, but in the last couple of 
moves the game has slowed down considerably. It seems that Moriuchi was not 
really sure how to develop his pieces here.

29.P7e-7d    04:11:00  02:29:00

Diagram 2

It is unclear if Tanigawa was aware of Moriuchi's problems or if he just played 
according his famous attacking style. This is a psychologically well-timed pawn 
push. White has two possible replies: defending with 30.Px7d or counter-attacking 
with 31.B*6d. This is not a single move decision, but will decide if white will 
try to kill the black attack or win in a mutual attack. Tanigawa played this 
move 35 minutes before the designated time to seal the move. Although this 
doesn't mean that the move has to be sealed at that time, it is not easy to 
make a difficult decision when everyone is waiting for you to seal the move.

30.P7cx7d    04:11:00  03:21:00

In the end, Moriuchi seals the move 17 minutes after the designated time. 
30.Px7d was a surprise for most followers and for Tanigawa. Moriuchi also 
would have preferred to play 30.B*6d, but there was something he didn't like 
about it even though after the game he didn't give any details. Tanigawa had 
expected 30.B*6d B*4f S*5e Bx5e Bx5e S*4f B6d S*5e which leads to a violent 
position.

31.B*6d      04:15:00  03:21:00
32.B*7c      04:15:00  03:22:00
33.B6dx7c+   04:18:00  03:22:00
34.N8ax7c    04:18:00  03:22:00
35.B*4f      04:19:00  03:22:00
36.K5a-6b    04:19:00  04:02:00
37.P*7e      04:46:00  04:02:00
38.R8b-8d    04:46:00  04:06:00
39.P2e-2d    05:01:00  04:06:00
40.P2cx2d    05:01:00  04:07:00
41.S3ex2d    05:01:00  04:07:00
42.S3c-3d    05:01:00  04:15:00
43.S2d-3e    05:10:00  04:15:00
44.P*2g      05:10:00  04:19:00
45.R2hx2g    05:11:00  04:19:00
46.P*2f      05:11:00  04:19:00
47.R2gx2f    05:11:00  04:19:00
48.P*2e      05:11:00  04:19:00
49.R2f-2h    05:11:00  04:19:00
50.S3dx3e    05:11:00  04:27:00
51.B4fx3e    05:12:00  04:27:00
52.P7dx7e    05:12:00  04:31:00
53.B3e-4f    05:42:00  04:31:00
54.G6a-7b    05:42:00  05:08:00
55.S*6d      06:40:00  05:08:00
56.S5d-6c!   06:40:00  06:14:00

Diagram 3

Very strong and overlooked by almost everyone including Tanigawa. Up until now, 
Tanigawa seemed to be attacking strongly and in control of this game, but this 
move shows that things are still very much unclear. Moriuchi felt that 56.R7d 
P*7f Px7e P*7e would be losing for white. The professionals in the press room 
agreed and had started to analyze S4e instead when 56.S6c was played. 56.S6c 
is not really a strange move. It improves the sideways working of the rook and 
threatening to exchange the attacking silver is also not a bad idea. Still, 
Tanigawa was surprised and rushed his next move.

57.R2hx2e?   07:15:00  06:14:00

An important mistake. At first glance, black seems to win a pawn and leave 
white without pawns in hand after the forced 58.P*2c. However, white now gets 
the chance to set up a strong counter-attack. Tanigawa admitted after the game 
that he regretted this move very much: "This was not the kind of position to be 
happy with a pawn". Correct was 57.R3h. For example, 58.P*3g Rx3g B*2f K6i Bx3g+ 
Sx6c+ Gx6c Nx3g and black has still many ways to attack.

58.P*2c      07:15:00  06:23:00
59.S6dx7e    07:22:00  06:23:00
60.R8d-3d    07:22:00  07:00:00
61.R2e-2h    07:23:00  07:00:00

No choice. White threatens B*2f next.

62.N2a-3c    07:23:00  07:01:00

The combination of the rook on 3d and 3c is very good shape. With 57.R3h black 
could have avoided the rook move to 3d.

63.S7g-7f    07:27:00  07:01:00
64.S*4e      07:27:00  07:06:00
65.P*7d      08:09:00  07:06:00
66.S4ex4f    08:09:00  07:21:00
67.P7dx7c+   08:09:00  07:21:00
68.G7bx7c    08:09:00  07:21:00
69.P*7d      08:09:00  07:21:00
70.S6cx7d    08:09:00  07:24:00
71.P4gx4f    08:09:00  07:24:00
72.S7dx7e    08:09:00  07:32:00
73.S7fx7e    08:09:00  07:32:00
74.P*7d      08:09:00  07:32:00
75.P*3e      08:16:00  07:32:00
76.R3d-5d    08:16:00  07:42:00
77.S*6d      08:22:00  07:42:00
78.B*9e?     08:22:00  07:52:00

Moriuchi also makes a mistake, but with less serious consequences than Tanigawa. 
Correct was immediately 80.Px7e.

79.N8i-7g    08:25:00  07:52:00
80.P7dx7e    08:25:00  08:01:00
81.S*5e      08:27:00  08:01:00
82.G7cx6d    08:27:00  08:33:00
83.S5ex5d    08:27:00  08:33:00
84.G6dx5d    08:27:00  08:33:00
85.P*7d      08:30:00  08:33:00
86.S*7b      08:30:00  08:50:00

Diagram 4

Here Moriuchi had intended 86.B*5e, but now he saw that after 87.P9f B9ex7g+ 
Gx7g Bx7g+ B*6h he can't play +Bx9i or +Bx6g because the white king is mated 
after B9e! Without 86.B*5e, the bishop drop on 9e is meaningless.

87.P9g-9f    08:30:00  08:50:00
88.B9e-8d    08:30:00  08:50:00
89.N7gx8e    08:30:00  08:50:00
90.S*8b      08:30:00  08:50:00
91.P3e-3d    08:39:00  08:50:00

Tanigawa has no choice but to attack.

92.N3c-4e!   08:39:00  08:50:00

Diagram 5

93.P3d-3c+?  08:39:00  08:50:00

According to Fukaura this might have been the final mistake. 93.Px4e seems 
bad because of either B*5e or B*4f, but after 93.B*5e R2f Bx1i+ P3c+ Gx3c 
R*3a black seems to have better fighting chances than in the game.

94.N4ex5g+   08:39:00  08:51:00
95.+P3cx3b   08:39:00  08:51:00
96.P7e-7f!   08:39:00  08:54:00

Opening the bishop's diagonal and making an attacking base on 7g decides 
the game. Black has no defense.

97.R*4b      08:50:00  08:54:00
98.K6b-6c    08:50:00  08:54:00
99.R4bx7b+   08:51:00  08:54:00
100.K6cx7b   08:51:00  08:54:00
101.S*7c     08:51:00  08:54:00
102.K7b-8c   08:51:00  08:57:00
103.S7cx8d+  08:52:00  08:57:00
104.K8cx8d   08:52:00  08:57:00
105.P7d-7c+  08:52:00  08:57:00
106.B*7g     08:52:00  08:58:00
107.G7hx7g   08:53:00  08:58:00

Now there is a long but not too difficult mate.

108.R*8i     08:53:00  08:58:00
109.N*6i     08:53:00  08:58:00
110.R8ix6i+  08:53:00  08:58:00
111.K5ix6i   08:53:00  08:58:00
112.S*6h     08:53:00  08:58:00
113.R2hx6h   08:53:00  08:58:00
114.+N5gx6h  08:53:00  08:58:00
115.K6ix6h   08:53:00  08:58:00
116.P7fx7g+  08:53:00  08:58:00
117.K6h-5i   08:53:00  08:58:00
118.R*5g     08:53:00  08:59:00
119.B*5h     08:53:00  08:59:00
120.S*6h     08:53:00  08:59:00
121.K5i-4h   08:53:00  08:59:00
122.N*5f     08:53:00  08:59:00
123.K4h-3i   08:53:00  08:59:00
124.S*4h     08:53:00  08:59:00
Resigns      08:53:00  08:59:00

Final Diagram

125.K3h or 125.K2h is mate after 126.G*2g and 125.Gx4h is mate after 
126.Nx4h+ Kx4h Rx5h+ K3g B*5i K3f G*2f K3e G*2d. An important win for 
Moriuchi. He is the favorite in this match, but Tanigawa was on a high 
after beating Habu in the Meijin play-off. It was very important to put 
a dent in Tanigawa's confidence early and winning the first game with 
the white pieces is exactly what Moriuchi wanted. Tanigawa already needs 
to win with white in the next game to keep this match close.