66th Honinbo
The 66th Honinbo began league play on 7 October 2010 and completed on July 21, 2011. Title holder Yamashita Keigo retained his title over challenger Hane Naoki by a score of 4-3. Yamashita Keigo won the first three games, Hane Naoki the next three, and Yamashita Keigo the final game.[1]
Preliminary tournament
The preliminary tournament started on 8 April 2010. Hane Naoki, Iyama Yuta, Takao Shinji, and Cho U retained their place in the Honinbo league from the 65th Honinbo. These players were joined by the winners of the preliminary tournament: Cho Sonjin, Seto Taiki, O Rissei, and Kobayashi Satoru.
Quarter-finals | Semi-finals | Final | ||||||||
13 May | ||||||||||
Yamashiro Hiroshi | 1 | |||||||||
17 June | ||||||||||
Fujita Akihiko | 0 | |||||||||
Yamashiro Hiroshi | 1 | |||||||||
27 May | ||||||||||
Takashima Takeshi | 0 | |||||||||
Goto Shungo | 0 | |||||||||
12 August | ||||||||||
Takashima Takeshi | 1 | |||||||||
Yamashiro Hiroshi | 0 | |||||||||
20 May | ||||||||||
Cho Sonjin | 1 | |||||||||
Ohashi Hirofumi | 0 | |||||||||
1 July | ||||||||||
Uchida Shuhei | 1 | |||||||||
Uchida Shuhei | 0 | |||||||||
27 May | ||||||||||
Cho Sonjin | 1 | |||||||||
Cho Sonjin | 1 | |||||||||
Yamada Kimio | 0 | |||||||||
Quarter-finals | Semi-finals | Final | ||||||||
13 May | ||||||||||
Hoshino Masaki | 0 | |||||||||
10 June | ||||||||||
Kataoka Satoshi | 1 | |||||||||
Kataoka Satoshi | 1 | |||||||||
13 May | ||||||||||
Obuchi Morito | 0 | |||||||||
Obuchi Morito | 1 | |||||||||
29 July | ||||||||||
Yasuda Yasutoshi | 0 | |||||||||
Kataoka Satoshi | 0 | |||||||||
13 May | ||||||||||
Seto Taiki | 1 | |||||||||
Yamada Noriyoshi | 0 | |||||||||
24 June | ||||||||||
Akiyama Jiro | 1 | |||||||||
Akiyama Jiro | 0 | |||||||||
27 May | ||||||||||
Seto Taiki | 1 | |||||||||
Seto Taiki | 1 | |||||||||
Mimura Tomoyasu | 0 | |||||||||
Quarter-finals | Semi-finals | Final | ||||||||
13 May | ||||||||||
Nakane Naoyuki | 0 | |||||||||
24 June | ||||||||||
Nakano Hironari | 1 | |||||||||
Nakano Hironari | 0 | |||||||||
3 June | ||||||||||
Kono Rin | 1 | |||||||||
Ogata Masaki | 0 | |||||||||
2 September | ||||||||||
Kono Rin | 1 | |||||||||
Kono Rin | 0 | |||||||||
20 May | ||||||||||
O Rissei | 1 | |||||||||
O Rissei | 1 | |||||||||
15 July | ||||||||||
Mochizuki Kenichi | 0 | |||||||||
O Rissei | 1 | |||||||||
27 May | ||||||||||
Yuki Satoshi | 0 | |||||||||
Kamimura Haruo | 0 | |||||||||
Yuki Satoshi | 1 | |||||||||
Quarter-finals | Semi-finals | Final | ||||||||
22 April | ||||||||||
O Meien | 0 | |||||||||
10 June | ||||||||||
Kobayashi Satoru | 1 | |||||||||
Kobayashi Satoru | 1 | |||||||||
13 May | ||||||||||
Ishida Atsushi | 0 | |||||||||
Shida Tatsuya | 0 | |||||||||
19 August | ||||||||||
Ishida Atsushi | 1 | |||||||||
Kobayashi Satoru | 1 | |||||||||
3 June | ||||||||||
Suzuki Shinji | 0 | |||||||||
Mizokami Tomochika | 0 | |||||||||
24 June | ||||||||||
Suzuki Shinji | 1 | |||||||||
Suzuki Shinji | 1 | |||||||||
13 May | ||||||||||
Cho Chikun | 0 | |||||||||
Cho Chikun | 1 | |||||||||
Takemiya Masaki | 0 | |||||||||
League play
League play commenced on 7 October after the preliminaries, which finished on 2 September. Hane Naoki, who lost the Honinbo title to Yamashita Keigo the year prior, won the right to challenge Keigo for the title.[1]
Player | H.N. | I.Y. | T.S. | C.U. | O.R. | K.S. | C.S. | S.T. | Record | Notes |
---|---|---|---|---|---|---|---|---|---|---|
Hane Naoki | – | B+R | W+R | X | W+0.5 | B+R | W+R | B+R | 6–1 | Challenger |
Iyama Yuta | X | – | B+R | X | X | W+R | B+R | W+R | 4–3 | |
Takao Shinji | X | X | – | B+1.5 | X | X | W+R | X | 2–5 | Eliminated |
Cho U | W+R | B+0.5 | X | – | B+3.5 | X | B+R | X | 4–3 | |
O Rissei | X | W+R | B+R | X | – | X | X | B+R | 3–4 | Eliminated |
Kobayashi Satoru | X | X | W+2.5 | B+4.5 | W+R | – | X | X | 3–4 | Eliminated |
Cho Sonjin | X | X | X | X | B+R | W+11.5 | – | X | 2–5 | Eliminated |
Seto Taiki | X | X | W+R | B+R | X | B+3.5 | W+R | – | 4–3 |
Finals
Yamashita Keigo (Honinbo) | W+7.5 | B+R | W+1.5 | W+4.5 | 4 | |||
Hane Naoki (Challenger) | W+0.5 | B+R | W+7.5 | 3 |