55th Guksu
      The 55th Guksu has been won by Cho Hanseung, who defeated the defending champion Choi Cheol-han 3:2.[1]
 Title Match 
| Status | Name | 1st round | 2nd round | 3rd round | 4th round | 5th round | Final Result | 
|---|
|  |  | 17 October | 25 October | 8 November | 14 November | 16 November |  | 
| Title Holder | Choi Cheol-han | - | B+R | - | B+R | - | 2 | 
| Challenger | Cho Hanseung | B+R | - | B+R | - | B+1.5 | 3 | 
 Challenger Tournament 
-  As of 10 January 2012.
|  | Round of 16 |  | Quarter-finals |  | Semi-finals |  | Final | 
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
|  | 20 June |  |  |  |  |  |  |  |  |  | 
|  | 
|  | Lee Sedol | W+R | 
|  | 27 July | 
|  | Kim Jiseok | B |  | 
|  | Lee Sedol | W | 
|  | 21 June | 
|  |  | Cho Hanseung | B+R |  | 
|  | Yun Junsang | W | 
|  |  | 9 August | 
|  | Cho Hanseung | B+R |  | 
|  | Cho Hanseung | B+R | 
|  | 23 June | 
|  |  | Kang Dongyun | W |  | 
|  | Kang Dongyun | W+R | 
|  | 26 July |  | 
|  | Baek Hongsuk | B |  | 
|  | Kang Dongyun | W+R | 
|  | 20 June | 
|  |  | Kang Yootaek | B |  | 
|  | Lee Jihyun | B | 
|  |  | 6,19 September | 
|  | Kang Yootaek | W+R |  | 
|  | Cho Hanseung | 2 | 
|  | 21 June | 
|  |  | Won Sungjin | 0 | 
|  | Park Junghwan | W+R | 
|  | 26 July |  | 
|  | Kim Dongho | B |  | 
|  | Park Junghwan | W+R | 
|  | 30 June | 
|  |  | Lee Changho | B |  | 
|  | Lee Changho | B+R | 
|  |  | 19 August | 
|  | Hong Sungji | W |  | 
|  | Park Junghwan | B | 
|  | 7 May | 
|  |  | Won Sungjin | W+0.5 |  | 
|  | Heo Yeongho | W+R | 
|  | 27 July |  | 
|  | Hong Kipyo | B |  | 
|  | Heo Yeongho | W | 
|  | 23 June | 
|  |  | Won Sungjin | B+R |  | 
|  | Ko Geuntae | B | 
|  |  |  | 
|  | Won Sungjin | W+R |  | 
|  | 
 References 
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 |  |  | Continental |  | 
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 |  |  | Taiwan | 
 Qiwang  Tianyuan  Wangzuo  Guoshou  Haifong Cup  Qisheng  Zhonghuan Cup  Aixin Cup  Donggang Cup  Siyuan Cup
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