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.
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.
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Quarter-finals |
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Semi-finals |
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Final |
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13 May |
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Yamashiro Hiroshi |
1 |
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17 June |
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Fujita Akihiko |
0 |
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Yamashiro Hiroshi |
1 |
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27 May |
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Takashima Takeshi |
0 |
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Goto Shungo |
0 |
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12 August |
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Takashima Takeshi |
1 |
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Yamashiro Hiroshi |
0 |
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20 May |
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Cho Sonjin |
1 |
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Ohashi Hirofumi |
0 |
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1 July |
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Uchida Shuhei |
1 |
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Uchida Shuhei |
0 |
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27 May |
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Cho Sonjin |
1 |
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Cho Sonjin |
1 |
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Yamada Kimio |
0 |
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Quarter-finals |
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Semi-finals |
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Final |
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13 May |
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Hoshino Masaki |
0 |
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10 June |
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Kataoka Satoshi |
1 |
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Kataoka Satoshi |
1 |
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13 May |
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Obuchi Morito |
0 |
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Obuchi Morito |
1 |
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29 July |
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Yasuda Yasutoshi |
0 |
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Kataoka Satoshi |
0 |
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13 May |
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Seto Taiki |
1 |
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Yamada Noriyoshi |
0 |
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24 June |
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Akiyama Jiro |
1 |
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Akiyama Jiro |
0 |
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27 May |
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Seto Taiki |
1 |
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Seto Taiki |
1 |
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Mimura Tomoyasu |
0 |
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Quarter-finals |
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Semi-finals |
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Final |
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13 May |
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Nakane Naoyuki |
0 |
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24 June |
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Nakano Hironari |
1 |
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Nakano Hironari |
0 |
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3 June |
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Kono Rin |
1 |
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Ogata Masaki |
0 |
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2 September |
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Kono Rin |
1 |
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Kono Rin |
0 |
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20 May |
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O Rissei |
1 |
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O Rissei |
1 |
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15 July |
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Mochizuki Kenichi |
0 |
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O Rissei |
1 |
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27 May |
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Yuki Satoshi |
0 |
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Kamimura Haruo |
0 |
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Yuki Satoshi |
1 |
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Quarter-finals |
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Semi-finals |
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Final |
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22 April |
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O Meien |
0 |
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10 June |
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Kobayashi Satoru |
1 |
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Kobayashi Satoru |
1 |
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13 May |
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Ishida Atsushi |
0 |
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Shida Tatsuya |
0 |
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19 August |
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Ishida Atsushi |
1 |
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Kobayashi Satoru |
1 |
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3 June |
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Suzuki Shinji |
0 |
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Mizokami Tomochika |
0 |
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24 June |
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Suzuki Shinji |
1 |
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Suzuki Shinji |
1 |
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13 May |
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Cho Chikun |
0 |
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Cho Chikun |
1 |
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Takemiya Masaki |
0 |
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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.
| 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 |
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| 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 |
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| 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 |
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Finals
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Player
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1
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2
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3
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4
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5
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6
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7
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T
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Yamashita Keigo
(Honinbo) |
W+7.5 |
B+R |
W+1.5 |
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W+4.5 |
4 |
Hane Naoki
(Challenger) |
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W+0.5 |
B+R |
W+7.5 |
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3 |
COMMENTS
