GS Caltex Cup
South Korean Go competition
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The GS Caltex Cup (Korean: GS칼텍스배 바둑기전) is a Go competition.
Outline
The GS Caltex Cup replaced the LG Refined Oil Cup. It is organized by the Maeil Business Newspaper, Maeil Broadcasting Network (MBN), and Korea Baduk Association, and sponsored by GS Caltex. The winner receives 70 million won in prize money, and the runner-up receives 30 million won (as of 2025).[1] The final is a best-of-5. Komi is 6.5 points.
Players begin with 30 minutes of thinking time on their clock and add a 30 second increment per move (Fischer time). The time increment system was introduced in 2024, replacing the byoyomi system.[2]
Past winners and runners-up
| Year | Winner | Score | Runner-up | |
|---|---|---|---|---|
| 1 | 1996 | Yoo Changhyuk | 3–2 | Cho Hunhyun |
| 2 | 1997 | Lee Changho | 3–0 | Choi Myung-hoon |
| 3 | 1998 | 3–0 | ||
| 4 | 1999 | Seo Bongsoo | 3–2 | Yoo Changhyuk |
| 5 | 2000 | Choi Myunghoon | 3–1 | Rui Naiwei |
| 6 | 2001 | Lee Changho | 3–0 | Choi Myunghoon |
| 7 | 2002 | Lee Sedol | 3–1 | |
| 8 | 2003 | Lee Changho | 3–0 | Cho Hanseung |
| 9 | 2004 | 3–0 | Park Yeonghun | |
| 10 | 2005 | Choi Cheol-han | 3–2 | Lee Changho |
| 11 | 2006 | Lee Sedol | 3–0 | Choi Cheol-han |
| 12 | 2007 | Park Yeonghun | 3–2 | Lee Sedol |
| 13 | 2008 | 3–0 | Won Seongjin | |
| 14 | 2009 | Cho Hanseung | 3–1 | Park Yeonghun |
| 15 | 2010 | Won Seong-jin | 3–1 | Cho Hanseung |
| 16 | 2011 | Park Junghwan | 3–0 | Park Yeonghun |
| 17 | 2012 | Lee Sedol | 3–2 | |
| 18 | 2013 | Kim Jiseok | 3–0 | Lee Sedol |
| 19 | 2014 | 3–0 | Choi Cheol-han | |
| 20 | 2015 | Mok Jinseok | 3–1[3] | |
| 21 | 2016 | Lee Donghoon | 3–0 | Yun Chanhee |
| 22 | 2017 | Ahn Kukhyun | 3–2 | Kim Jiseok |
| 23 | 2018 | Shin Jinseo | 3–2 | Lee Sedol |
| 24 | 2019 | 3–0 | Kim Jiseok | |
| 25 | 2020 | 3–0 | ||
| 26 | 2021 | 3–2[4] | Byun Sangil | |
| 27 | 2022 | 3–0[5] | Byun Sangil | |
| 28 | 2023 | Byun Sangil | 3–0[6] | Choi Jeong |
| 29 | 2024 | Shin Min-jun | 3–0[2] | Park Sang-jin |
| 30 | 2025 | Shin Jin-seo | 3–0[1] | An Seong-jun |