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

Player
1
2
3
4
5
6
7
T
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

References

  1. 1 2 "66th Honinbo-sen". igokisen. Retrieved 21 July 2011.
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