Shunkan Shogi; Report de la 5ta y ultima partida del torneo "KIO"

Buenas, actualización rapidilla con el "Kifu ( anotacion, y comentarios en ingles U_Uu )" del torneo "KIO" ( Japón), entre Kubo y Sato. Por cortesia de Reijer Grimberge, desde la shogi-list. - 12 Apr.

=== KIFU === And coments ===

In this Shukan Shogi report the fifth and final game of the Kio match
between Kubo and Sato. A very dramatic game to end a close match. Here is
the game with comments:

[Black "Sato Yasumitsu, Challenger"]
[White "Kubo Toshiaki, Kio"]
[Event "35th Kio-sen, Game 5"]
[Date "March 30th 2010"]
1.P7g-7f 00:00:00 00:00:00

The furigoma resulted in three tokins, giving challenger Sato the black
pieces in the fifth and decisive game of this Kio match. This was a
hard-fought match, but they don't come much tougher than what happened in
this game...

2.P3c-3d 00:00:00 00:00:00
3.P2g-2f 00:00:00 00:00:00
4.P5c-5d 00:00:00 00:00:00
5.P2f-2e 00:00:00 00:00:00
6.R8b-5b 00:00:00 00:00:00

Of course the Gokigen Nakabisha. The question is: what has Sato prepared?

7.S3i-4h 00:00:00 00:00:00
8.P5d-5e 00:00:00 00:01:00
9.K5i-6h 00:00:00 00:01:00
10.B2b-3c 00:00:00 00:02:00
11.P3g-3f 00:00:00 00:02:00
12.K5a-6b 00:00:00 00:09:00
13.S4h-3g 00:00:00 00:09:00
14.K6b-7b 00:00:00 00:09:00
15.S3g-4f 00:03:00 00:09:00
16.G4a-3b 00:03:00 00:13:00
17.K6h-7h 00:06:00 00:13:00
18.K7b-8b 00:06:00 00:16:00
19.S7i-6h 00:12:00 00:16:00
20.S3a-4b 00:12:00 00:18:00
21.S6h-7g 00:31:00 00:18:00
22.S4b-5c 00:31:00 00:19:00
23.P3f-3e 00:32:00 00:19:00

This is the most popular attacking strategy these days: moving the left
silver to 4f and attacking the head of the bishop next.

24.P3dx3e 00:32:00 00:27:00
25.S4fx3e 00:32:00 00:27:00
26.S5c-6d 00:32:00 00:43:00
27.P*3d 00:57:00 00:43:00
28.B3c-2b 00:57:00 01:08:00
29.P2e-2d 01:21:00 01:08:00
30.P2cx2d 01:21:00 01:08:00
31.R2hx2d 01:21:00 01:08:00

It looks like black can break through with 31.Sx2d, but after 32.B4d white
can strongly develop his major pieces. For example, 33.S3e Bx3e Rx2a+ S7b is
good for black because even if black picks up a second piece for the silver
after +Rx1a, "the bishop on 8h is in a hideous position, making it
impossible for the static rook side to win" (Sato).

32.P*2c 01:21:00 01:32:00
33.R2d-2f 01:23:00 01:32:00
34.L9a-9b 01:23:00 01:34:00

This preparation move for the Anaguma took Sato completely by surprise. Kubo
had a simple explanation: "If one has the opportunity to move into a
stronger castle, it is better to take that opportunity".

35.S7g-6f 02:15:00 01:34:00

Sato took 52 minutes for this move, which clearly shows that he hadn't
prepared for this development.

36.K8b-9a 02:15:00 01:38:00
37.G6i-6h 02:23:00 01:38:00
38.S7a-8b 02:23:00 01:38:00
39.P9g-9f 02:23:00 01:38:00
40.P7c-7d 02:23:00 01:41:00
41.G4i-5h 02:25:00 01:41:00
42.G6a-7a 02:25:00 01:45:00
43.B8h-9g 02:27:00 01:45:00
44.P7d-7e 02:27:00 02:09:00
45.P7fx7e 02:27:00 02:09:00
46.P5e-5f 02:27:00 02:10:00
47.P5gx5f 02:37:00 02:10:00
48.P*5e 02:37:00 02:14:00
49.S3e-4f 02:43:00 02:14:00
50.P5ex5f 02:43:00 02:15:00
51.P7e-7d 02:43:00 02:15:00
52.P4c-4d 02:43:00 02:38:00
53.N2i-3g 02:51:00 02:38:00
54.B2b-3a 02:51:00 02:44:00
55.R2f-3f 03:10:00 02:44:00
56.B3a-4b 03:10:00 02:45:00
57.P*2b 03:17:00 02:45:00
58.G3bx2b 03:17:00 02:46:00
59.S4f-3e 03:17:00 02:46:00
60.G2b-3b 03:17:00 02:47:00
61.S3ex4d 03:23:00 02:47:00
62.R5b-5d 03:23:00 02:51:00
63.P3d-3c+ 03:28:00 02:51:00
64.N2ax3c 03:28:00 02:56:00
65.R3f-3d 03:28:00 02:56:00
66.P*3f 03:28:00 03:03:00
67.P*5e 03:29:00 03:03:00
68.S6dx5e! 03:29:00 03:14:00

Great move by the "Sabaki Artist" Kubo. This temporary sacrifice of the
silver brings all the white pieces to life.

69.B9gx4b+ 03:39:00 03:14:00
70.G3bx4b 03:39:00 03:15:00
71.S6fx5e 03:42:00 03:15:00
72.R5dx7d 03:42:00 03:16:00
73.P*7f 03:43:00 03:16:00
74.P3fx3g+ 03:43:00 03:18:00

Not only has white made a strong tokin on 3g and exchanged the passive
bishop on 4b, he has forced black to drop a pawn on the 7th file, so black
no longer has the pawn drop on 7b to shake up the anaguma castle.

75.B*6e 03:43:00 03:18:00
76.R7d-8d 03:43:00 03:25:00
77.S*7e 03:45:00 03:25:00
78.R8dx4d 03:45:00 03:31:00
79.R3dx4d 03:46:00 03:31:00
80.P*4c 03:46:00 03:32:00
81.R4d-5d 03:48:00 03:32:00
82.P*7g 03:48:00 03:39:00
83.N8ix7g 03:49:00 03:39:00
84.B*3f 03:49:00 03:39:00
85.R5d-5a+ 03:54:00 03:39:00
86.+P3gx4g 03:54:00 03:39:00
87.G5hx4g 03:54:00 03:39:00
88.B3fx4g+ 03:54:00 03:39:00
89.+R5ax4b 03:54:00 03:39:00
90.S*5i 03:54:00 03:41:00
91.G*5h 03:55:00 03:41:00
92.S5ix6h+ 03:55:00 03:41:00
93.G5hx6h 03:55:00 03:41:00
94.P5f-5g+ 03:55:00 03:46:00
95.B6ex4g 03:55:00 03:46:00
96.+P5gx4g 03:55:00 03:46:00
97.B*3e 03:57:00 03:46:00
98.N*5f 03:57:00 03:51:00
99.G6h-6i 03:57:00 03:51:00
100.G*7b? 03:57:00 03:51:00

This is overly cautious. Without the gold, the white attack is not so strong
and with two rooks, black has a lot of firepower.

101.P*5g 03:58:00 03:51:00
102.+P4gx5g 03:58:00 03:52:00
103.B3ex5g 03:58:00 03:52:00
104.N3c-4e 03:58:00 03:52:00
105.B5g-4f 03:58:00 03:52:00
106.B*5g 03:58:00 03:52:00
107.S*7i 03:58:00 03:52:00
108.P*5h 03:58:00 03:52:00
109.R*3b? 03:59:00 03:52:00

The first move in byoyomi by Sato and a serious mistake. We will see why in
a short while. The rook drop in itself is not a bad move, but the square is
wrong. If Sato would have dropped the rook on 2b, it seems that black has a
decisive advantage.

110.G*5i! 03:59:00 03:54:00

Dropping a gold on 5i is rarely seen and almost always bad, but Kubo might
make this his signature move. After winning the 6th game of the Osho with a
gold drop on 5i, here it is again.

111.G6i-6h 03:59:00 03:54:00
112.N5fx6h+ 03:59:00 03:55:00
113.S7ix6h 03:59:00 03:55:00
114.B5gx4f+ 03:59:00 03:55:00
115.S5ex4f 03:59:00 03:55:00
116.P*3a 03:59:00 03:55:00

This is why the rook drop on 3b is wrong. Sat said after the game that as
soon as he played 109.R*3b, he realized that P*3a would be a big problem.

117.R3b-2b+ 03:59:00 03:55:00

The only way to keep the attack of the two rooks focused.

118.G*3b 03:59:00 03:55:00

Now black has to give up one of the two rooks and the black position is very
vulnerable to rook drops.

119.+R2bx3b 03:59:00 03:55:00
120.P3ax3b 03:59:00 03:55:00
121.G*7i 03:59:00 03:55:00
122.R*4i 03:59:00 03:57:00
123.B*5e 03:59:00 03:57:00
124.G5i-6i 03:59:00 03:57:00
125.G7ix6i 03:59:00 03:57:00
126.B*8i 03:59:00 03:57:00
127.K7hx8i 03:59:00 03:57:00
128.R4ix6i+ 03:59:00 03:57:00
129.G*7i 03:59:00 03:57:00
130.G*7h 03:59:00 03:57:00
131.K8i-9h 03:59:00 03:57:00
132.G7hx7i 03:59:00 03:57:00
133.S6hx7i 03:59:00 03:57:00
134.+R6ix7i 03:59:00 03:57:00
135.G*8i 03:59:00 03:57:00
136.+R7i-6h? 03:59:00 03:58:00

Here Sato thought he had lost the game because of 136.S*9g. Kubo didn't like
this because of 137.Kx9g +Rx8i S*9h and he thought that black could fight
back. However, after +Rx9i N8e (attacking the rook, so Kubo thought this
could not be played) P*7g! white has a decisive advantage. For example, N*7d
L*7c Nx8b G7ax8b wins for white.

137.K9h-9g 03:59:00 03:58:00
138.+R6h-5i? 03:59:00 03:58:00

Sato was already very relieved that Kubo had let him off the hook with
136.+R7i-6h, but here he must have pinched himself.

139.B*2f! 03:59:00 03:58:00

Now white has to give up the rook that was gifted to him earlier on because
139.+Rx8i fails to 140.+Bx7a and Gx7a Bx8b+ leads to mate.

140.P*7c 03:59:00 03:59:00
141.B2fx5i 03:59:00 03:59:00
142.P5hx5i+ 03:59:00 03:59:00
143.R*4a 03:59:00 03:59:00
144.P*5d 03:59:00 03:59:00
145.B5ex1a+ 03:59:00 03:59:00
146.B*6h 03:59:00 03:59:00
147.L*8e 03:59:00 03:59:00
148.P9c-9d 03:59:00 03:59:00
149.S4fx4e 03:59:00 03:59:00
150.S*3c 03:59:00 03:59:00
151.+B1ax3c 03:59:00 03:59:00
152.P3bx3c 03:59:00 03:59:00
153.G8i-7h 03:59:00 03:59:00
154.B*7i 03:59:00 03:59:00
155.S*8h 03:59:00 03:59:00
156.B7ix8h+ 03:59:00 03:59:00
157.K9gx8h 03:59:00 03:59:00
158.B6h-5g+ 03:59:00 03:59:00
159.S7e-6f 03:59:00 03:59:00
160.+B5g-3e 03:59:00 03:59:00
161.N*7e 03:59:00 03:59:00
162.S*6i 03:59:00 03:59:00
163.P*4f 03:59:00 03:59:00
164.S6ix7h+ 03:59:00 03:59:00
165.K8hx7h 03:59:00 03:59:00
166.+P5i-6i 03:59:00 03:59:00

And game over after 166.Kx6i +Bx4f P*5g, because +B4e fails to Lx8c+ and
after either Sx8c or Gx8c, black wins with Rx7a+ followed by Nx8c=. In the
press room the analysis was stopped and preparations were underway to
welcome a new Kio title holder.

167.S4ex5d?? 03:59:00 03:59:00

A blunder that throws away the game and the match. Sato said after the game
that he never even looked at 167.Kx6i.

168.+B3ex4f 03:59:00 03:59:00
169.P*5g 03:59:00 03:59:00
170.+B4f-6d 03:59:00 03:59:00
171.S5d-5c= 03:59:00 03:59:00

The reason Sato played 167.Sx5d was that he thought that black could play
171.+Rx7a here. However, if white takes the other rook with 172.+Bx4b then
even thought it is a close call, there is no mate after Nx8c=.

172.+B6dx5c 03:59:00 03:59:00
173.+R4bx5c 03:59:00 03:59:00
174.S*7i 03:59:00 03:59:00
175.N7g-6e 03:59:00 03:59:00
176.+P6i-6h 03:59:00 03:59:00
177.K7h-7g 03:59:00 03:59:00
178.G*7h 03:59:00 03:59:00
179.K7g-8f 03:59:00 03:59:00
180.P8c-8d 03:59:00 03:59:00

The decisive move at last. This pawn both attacks the vital lance on 8e and
attacks on the head of the black king.

181.N*8c 03:59:00 03:59:00
182.S8bx8c 03:59:00 03:59:00
183.N7ex8c= 03:59:00 03:59:00
184.G7bx8c 03:59:00 03:59:00
185.N6ex7c+ 03:59:00 03:59:00
186.G8cx7c 03:59:00 03:59:00
187.S6f-6e 03:59:00 03:59:00
188.P8dx8e 03:59:00 03:59:00
189.K8f-7e 03:59:00 03:59:00
190.+P6hx6g 03:59:00 03:59:00
Resigns 03:59:00 03:59:00

The simple threat is G*8d, but there is no good defense, so Sato resigned
here. A great game that had everything that makes shogi such a great game.
Sato will be very disappointed that he let this one slip away. On the other
hand, Kubo will be delighted with being able to claw back from the abyss and
keep his two major titles. This was the last game of the 2009-2010 season,
but it was so impressive that it was selected as the best game of the
season.

--

Reijer Grimbergen
School of Computer Science, Tokyo University of Technology
1404-1 Katakura, Hachioji, Tokyo, 192-0982 Japan
Tel: +81-(0)42-637-2591 FAX: +81-(0)42-637-2112
URL: http://www.teu.ac.jp/gamelab/