O Yujin

O Yujin (sometimes Oh Yujin, Hangul: 오유진, Hanja: 吳侑珍, Japanese 呉侑珍, Chinese: 吴侑珍) is a female Korean 9-dan professional player born on 11 Jun 1998. She is the second daughter of O Dong-hwan and Lee Kyung-hee. She learned Go with her older sister on their father’s recommendation.

Table of contents Baduk career: leading female professional Early Baduk career Promotion history Titles and runners up 2015 2016 2017 2018 2019 2021 2022 2024 2025 Lifetime scores against top players Notable victories over leading (male) players Head-to-head scores against current female rivals Style Views on male vs female players Personal life Links Videos Pictures

Baduk career: leading female professional

On the 2025-01-01 rating list, O Yujin is the #6 ranked female in the world and #3 female in Korea. On the 2016, 2017, and 2019 rating lists, she was the #3 female go player in the world.

In 2024, she scored her 600th career win. Her total score is 1,008 games, 644 wins, 364 losses, for a 63.9% win rate (as of 25 Jun 2025). She has won 3 international women’s titles and 3 Korean women’s titles.

Early Baduk career

O was a pupil of Han Jongjin 8p at the Chungam Baduk Dojo. O said that Han as well as Lee Young-gu 9p were the players she most admired.

Promotion history

O Yujin qualified as a pro on 30 Jul 2012 aged 14 through a double elimination tournament, 41st Women’s Entrance Competition, alongside Kim Sinyoung. In the final O, beat Park Taehee by 2.5 points. Park became a professional next year in the 42nd Women’s Entrance Competition.

Next month, 15–21 Aug 2012, O Yujin became the first female to represent Korea at the (29th) World Youth Goe Championship (U-16). She scored 3 wins and 2 losses. The same year, Ueno Asami, then amateur 6 dan, was a female representative of Japan in the U-12 section, where she also scored +3–2.

O Yujin was promoted to 6-dan in 2018, 7-dan in 2019, and 8-dan in 2021. Then later that year, she was awarded a special promotion to 9-dan after beating Choi Jung 9p 2–1 in the 26th Women's Kuksu, after beating Cho Hyeyeon 9p and Kim Chaeyoung then-8p on the way.

• 9 dan / 2021.11.25 / Winner of 26th Women's Kuksu, Special Promotion to 9 dan in Limited Edition
• 8 dan / 2021.09.16 / Promotion to 8 Dan
• 7 dan / 2019.08.27 / Promotion to 7 Dan
• 6 dan / 2018.05.14 / Promotion to 6 Dan
• 5 dan / 2016.12.13 / 21st Women's Kuksu Winner
• 4 dan / 2016.11.16 / Winner of the 7th Gungryungsan Byeongseong Cup World Women’s Baduk Championship
• 3 dan / 2016.07.13 / 18th Nongshim Shin Ramyun Cup Preliminary Round
• 2 dan / 2015.03.11 / 59th National Championship Preliminary Round
• 1 dan / 2012.07.30 / 41st Women’s Entrance Competition

Titles and runners up

2015

• Runner-up 16th Women's Myeongin

2016

• Runner-up 17th Women's Myeongin
• Winner of Bingsheng Cup
• Winner of 21st Women's Kuksu
• 10th Auction Cup While still 18yo 3p, she ended Seo Bongsoo 9p’s winning streak of 9 games, the best in the tournament’s history

2017

• Runner-up 1st Women's Kisung
• Winner 7th Huang Longshi Shuang Deng Cup
• Gold Medal IMSA Elite Mind Games Women's Go Individual?

2018

• Runner up 9th Bingsheng Cup

2019

• Runner up 24th Women's Kuksu
• Most wins, 9th Huang Longshi Shuang Deng Cup

2021

• Winner of 5th Women's Kisung
• Winner of 25th Women's Kuksu

2022

• Winner of 5th Wu Qingyuan Cup
• Runner up of 1st Supreme Female Player

2024

• Runner up of 7th International Baduk Chunhyang Tournament 2024 (l. Nakamura Sumire, unofficial)
• Runner up of 4th IBK Cup Women’s Baduk Masters
• O Yujin also won her first seven games of the 10th Korean Women’s League, i.e. 100% in the first half, before an upset loss from a winning position to new 1p Choi Seo-bi in the first round of the second half.

2025

Lifetime scores against top players

(Based on Oh Yujin, Go Ratings and game list), as of 25 Jun 2025.)

Notable victories over leading (male) players

O Yujin has taken games from some of the greatest players in recent history, mainly of older generations, e.g.

• Cho Chikun 9p: 1–0
• Yi Ch'ang-ho 9p: 1–1
• Seo Bongsoo 9p: 2–0

Head-to-head scores against current female rivals

World rankings as of 16 May 2025.

• Choi Jung, 9p, current Korean and World #1 female: 10–26
• Kim Eunji, 9p, #2 female and #1 female teenager in world, #2 female in Korea: 4–9
• Ueno Asami, 6p, #3 female in world, #1 female in Japan: 3–0
• Zhou Hongyu, 7p, #4 female in world, #1 female in China: 5–5
• Tang Jiawen, 6p, #5 female in world, and #2 female in China: 1–2
• Kim Chaeyeong, 9p, #7 female in world, #4 female in South Korea: 5–13
• Fujisawa Rina, 7p, #8 female in world, #2 female in Japan: 5–1
• Yu Zhiying, 8p, #9 female in world, #3 female in China: 11–9
• Lu Minquan, 6p, #10 female in world, #4 female in China: 5–2
• Wu Yiming, 6p, #11 female and #2 female teenager in world, #5 female in China: 4–1
• Luo Chuyue, 6p, #12 female in world, #6 female in China: 1–1
• Li He, 6p, #13 female in world, #7 female in China: 8–2
• Nakamura Sumire, 4p, #14 ranked female and #3 female teenager in the world, #3 ranked female in Japan, #5 ranked female in Korea: 1–2
• Wang Chenxing, 5p, #15 ranked player in world, #8 female in China: 10–6
• Gao Xing, 5p, #16 in world, #9 in China: 5–0
• Ueno Risa, 3p, #17 female and #4 female teenager in world, #4 female in Japan: 1–0
• Rui Naiwei, 9p, #18 female in world, many years #1 female in world, #10 in China: 4–2
• Tang Yi, 5p, #19 female in world, #11 in China: 4–0
• Cho Seunga, 7p, #20 ranked player in world, and #6 ranked female player in Korea: 10–6
• Li XiaoxiTheYounger, 5p: 21 female and #5 female teenager in world: 2–0
• Cho Hyeyeon, 9p, #22 female in world, once #1 and many years #2 female in world, #7 female in Korea: 8–2
• Heo Seo-hyeon, 5p, #27 female in world, #7 female in Korea: 5–5
• Lee Minjin, 8p, #28 female in the world, #8 female player in Korea: 5–1
• Kim Jooah, 4p, #29 female in world, #9 female in Korea: 4–1
• Kim Dayoung, 5p, Kim Chaeyeong’s younger sister, #30 ranked female in the world and #10 female in Korea: 8–6
• Kim Hye-min, 9p, #31 female in the world, #11 female in Korea: 5–5
• Kim Minseo, 4p: #32 female in world, 1–0
• Nyu Eiko, 4p, #33 ranked female player and #304 overall, and #5 ranked female player in Japan: 5–1
• Joanne Missingham aka Hei Jiajia, 7p, #39 female in world, #1 ranked female player in Taiwan: 1–1
• Kim Eunseon 6p, #41 female in world: 9–0
• Xie Yimin, 7p, #44 ranked female in the world, #5 ranked female in Japan (#1 for many years): 6–1
• Jeong Yujin, 4p, #49 female in world: 3–1
• Pak Chi-eun (Park Shiun), 9p, #68 in world (formerly #3 for 4 years), #23 in Korea (formerly #1): 6–0
• O Jeonga, 5p, 1st IBK Cup runner up: 11–5
• Lee Suljoo, 3p: #78 female in world: 1–0
• Kim Soojin 6p: #94 female in world: 6–1

Style

O Yujin has an agressive style, but she prefers to build up thick positions, biding her time to attack. She admires Lee Sedol’s creativity.

Views on male vs female players

O Yujin would like to reach the top 100 in the world of either sex. But when she was 16, she said:

I think female players are a little behind male players in terms of concentration and stamina.

Personal life

O Yujin and Choi Jung are close friends. ‘Fantasy combination’ Choi Jeong and Oh Yu-jin “Thank you to the fans who supported us.” ''Baduk News,'' 2019.06.13 (in Korean)

O Yujin is also a good friend of Fujisawa Rina, who wrote on her Twitter page (16 May 2020):

A little introduction to 7-dan O Yujin, who I’ll be playing against tomorrow ♡ She’s currently ranked #2 among Korean female players. We’re the same age 😊 We’ve been on the same team in the Korean League for three years in a row ✨ Even though I don’t understand Korean, she always kindly talks to me in Korean. She often says, “I’m your Korean teacher” 😂 She’s cute, cheerful, kind, and super strong at Go ✨ There aren’t enough characters to say everything I want to!

O Yujin responded on her Instagram page:

Rina introduced me to you ahead of the Oro event tournament tomorrow 😍 My favorite Rina ❤

Nakamura Sumire admires O Yujin, saying just after she moved:

The players I respect are Park Junghwan 9-dan, Choi Jung 9-dan, and O Yujin 9-dan. … Not only are they strong, but they also have really good personalities and are kind. O Yujin 9-dan was on the same team as me in the (9th Korean) women’s baduk league, and she was really kind to me. I think she’s a really good person. O Yujin-sensei and I are in the same team in the Women’s Go League, and she often gives me a lot of advice.

O used to wear thick glasses, but since mid-2016, has worn contacts. In some photos, O wears a cross necklace.

Links

• Korean Wikipedia
• Japanese Wikipedia
• Chinese Wikipedia
• Korean Baduk profile
• Go Ratings and Games
• Go4Go
• Her Instagram page

Videos

• A pre-game YouTube link and post-game YouTube link interviews (both her and Fujisawa Rina before and after 2023 Korean Women Baduk Team's evaluational matches against invited players from Japan and China in August 2023.
• A pre-game YouTube link and post-game YouTube link interviews (both her and Nakamura Sumire before and after 2023 Korean Women Baduk Team's evaluational matches against invited players from Japan and China in September 2023.

Pictures

O Yujin (right) vs Nakamura Sumire, final, Chunhyang Selection Tourney, Jun 2024 (Image credit: m.yna.co.kr)

oh yujin asian games 2023 (Image credit: Foxwq.com)

O Yujin (left) and Nakamura Sumire, finalists, Chunhyang Selection Tourney, Jun 2024 (Image credit: Asahi Shimbun, Twitter)

O Yujin (right) and Nakamura Sumire, analyzing, Chunhyang Selection Tourney, Jun 2024 (Image credit: Asahi Shimbun, Twitter)