60th Osho Match Game 6
[Black "Kubo Toshiaki, Osho"]
[White "Toyoshima Masayuki, Challenger"]
[Event "60th Osho-sen, Game 6"]
[Date "March 14th and 15th 2011"]
1.P7g-7f 00:00:00 00:00:00
2.P3c-3d 00:00:00 00:01:00
3.P7f-7e 00:01:00 00:01:00
4.S7a-6b 00:01:00 00:09:00
5.P6g-6f 00:03:00 00:09:00
6.K5a-4b 00:03:00 00:10:00
7.R2h-7h 00:08:00 00:10:00
8.P6c-6d 00:08:00 00:12:00
9.K5i-4h 00:10:00 00:12:00
10.S6b-6c 00:10:00 00:13:00
11.S3i-3h 00:12:00 00:13:00
12.S3a-3b 00:12:00 00:18:00
13.K4h-3i 00:20:00 00:18:00
14.K4b-3a 00:20:00 00:19:00
15.S7i-6h 00:25:00 00:19:00
16.P1c-1d 00:25:00 00:29:00
17.P1g-1f 00:28:00 00:29:00
18.G6a-5b 00:28:00 00:31:00
19.S6h-6g 00:30:00 00:31:00
20.P8c-8d 00:30:00 00:33:00
21.K3i-2h 00:34:00 00:33:00
22.P2c-2d 00:34:00 00:45:00
23.S6g-5f 00:47:00 00:45:00
24.P8d-8e 00:47:00 00:58:00
25.R7h-7f 00:48:00 00:58:00
26.B2b-3c 00:48:00 00:59:00
27.B8h-7g 00:55:00 00:59:00
28.K3a-2b 00:55:00 01:01:00
29.G6i-5h 01:32:00 01:01:00
30.P5c-5d 01:32:00 01:41:00
31.P6f-6e 01:47:00 01:41:00
32.R8b-8d 01:47:00 02:06:00
This position is very similar to the position in the fourth game. Both players have
changed only one move. Kubo has moved the left gold to 5h instead of to 7h and Toyoshima
has pushed the pawn to 5d instead of pushing the edge pawn with P9d. These looks like
small differences, but they lead to a completely different type of middle game. The
move 32.R8d is a new move prepared by Toyoshima. There have been a number of official
games with the position after 31.P6e, but each continued with 32.Px6e Sx6e R6b and both
black and white have won from there. Judging from this game, 32.R8d seems more than a
reasonable alternative for 32.Px6e.
33.P4g-4f 02:20:00 02:06:00
34.P6dx6e 02:20:00 03:03:00
35.S5fx6e 02:21:00 03:03:00
36.S6c-6d 02:21:00 03:03:00
37.S6ex6d 03:48:00 03:03:00
Kubo had planned to play 37.Sx5d, but here he saw that after 38.Bx7g+ Nx7g B*7h P7d
Bx8g+ black may have the counter fork B*6f, but after the exchange of the rook on 8d
and 7f, the white promoted bishop on 7f will be attacking the silver on 5d which is
good for white. Kubo played 37.Sx6d after 87 painful minutes, but this leads straight
to an extremely cramped position.
38.R8dx6d 03:48:00 03:03:00
39.P*6g 03:48:00 03:03:00
40.P5d-5e 03:48:00 04:01:00
Now the black major pieces are all boxed in. The immediate threat is S*7h which
simultaneously attacks 6g, 8g and 8i. There is only one way to avoid an immediate
collapse.
41.R7f-6f 04:24:00 04:01:00
42.P*6e 04:24:00 04:34:00
43.R6f-9f 04:39:00 04:34:00
44.S*7h 04:39:00 04:58:00
45.S*9h 04:55:00 04:58:00
A terrible place to drop the silver, but there was no alternative. Toyoshima has
clearly won the opening battle.
46.P9c-9d? 04:55:00 05:29:00
Hard to criticize Toyoshima's reasoning here. With the silver on 9h, he judges that
the exchange of rooks is now much more in his favor than a few moves ago. However,
here 46.P7d would have been the right choice. For example, 47.P5f Px7e Bx5e Bx5e
Px5e B*8h followed by Bx9i+ is good for white.
47.P4f-4e 05:05:00 05:29:00
48.P6e-6f 05:05:00 05:35:00
49.R9fx6f 05:42:00 05:35:00
50.R6dx6f 05:42:00 05:35:00
51.P6gx6f 05:42:00 05:35:00
Black desperately wants to take this pawn with the bishop, but this is not possible
here: 51.Bx6f R*6i R*5i (otherwise white can play Sx6g+) Rx6g+! Gx6g Sx6g+ B8h +S6h
is good for white.
52.R*6i 05:42:00 05:55:00
This looks good for white, but actually the position is unclear as the black position
is not so easy to break down.
53.G5h-6h? 05:56:00 05:55:00
Better was to play 53.R*6a immediately. Kubo didn't like to give up material after
54.Sx8i=, but then 55.G6h is a good counter because after 56.R7i+ Sx8i +Rx8i S*7h the
white promoted rook will be lost and black will get the better position.
54.R6i-7i+ 05:56:00 05:55:00
55.R*6a 05:56:00 05:55:00
56.P5e-5f? 05:56:00 06:42:00
In the post-mortem analysis Kubo suggested to play 56.P7d immediately here. After
57.Px7d P4d Rx8a+ Px4e +Rx9a P*7f is very strong because the black attack rolls on
after Gx7h +Rx7h B5i P5f and Bx6f next leads to a huge difference in the way the
bishops work.
57.P5gx5f 05:56:00 06:42:00
58.P7c-7d 05:56:00 06:42:00
59.P7ex7d 05:57:00 06:42:00
60.P4c-4d 05:57:00 06:42:00
61.R6ax8a+ 06:18:00 06:42:00
62.P4dx4e 06:18:00 06:42:00
63.P6f-6e 06:22:00 06:42:00
Now black can exchange bishops and black finally gets the upper hand.
64.P4e-4f 06:22:00 06:44:00
65.G6h-5h 06:46:00 06:44:00
66.S7h-6g+ 06:46:00 07:16:00
A last desperate try by Toyoshima, but Kubo stays very calm.
67.G5hx6g 06:48:00 07:16:00
68.P4f-4g+ 06:48:00 07:16:00
69.S*4d 06:56:00 07:16:00
70.B3cx4d 06:56:00 07:17:00
71.B7gx4d 06:56:00 07:17:00
72.S*3c 06:56:00 07:17:00
73.B4d-7g 07:12:00 07:17:00
74.P*4h 07:12:00 07:22:00
75.G4i-3i 07:15:00 07:22:00
76.+P4gx3h 07:15:00 07:23:00
77.G3ix3h 07:15:00 07:23:00
78.P4h-4i+ 07:15:00 07:23:00
79.B*8h 07:25:00 07:23:00
80.+R7i-7h 07:25:00 07:31:00
81.G6g-6h 07:26:00 07:31:00
82.+R7hx8h 07:26:00 07:31:00
83.B7gx8h 07:26:00 07:31:00
84.G5b-4b 07:26:00 07:31:00
85.B8h-6f 07:42:00 07:31:00
With this bishop working both in attack and defense, Kubo said that here he finally
felt that things were going his way.
86.B*7i 07:42:00 07:36:00
87.R*7h 07:43:00 07:36:00
88.B7ix6h+ 07:43:00 07:39:00
89.R7hx6h 07:43:00 07:39:00
90.G*4f 07:43:00 07:39:00
91.N*5d 07:44:00 07:39:00
92.G4b-4c 07:44:00 07:40:00
93.P*4b 07:46:00 07:40:00
94.G4a-3a 07:46:00 07:40:00
95.B*6d 07:46:00 07:40:00
96.S*3i 07:46:00 07:43:00
97.G3hx3i 07:48:00 07:43:00
98.+P4ix3i 07:48:00 07:43:00
99.+R8ax3a 07:49:00 07:43:00
100.K2bx3a 07:49:00 07:43:00
101.P4b-4a+ 07:49:00 07:43:00
102.K3ax4a 07:49:00 07:43:00
103.G*5a 07:50:00 07:43:00
Resigns 07:50:00 07:43:00
Mate after 104.Kx5a B8d K4a S*5b Kx5b N6b+ K4a +N5a because the two bishops are working
together perfectly. Like last year, Kubo wins game 1, 3, 4 and 6 to defend his Osho
title at the same venue he took it from Habu last year. The 20-year old challenger
Toyoshima failed in his first title bid, but it seems certain that he will be back
on the big stage soon.