Go Player Ratings

JAKOAbout ratings

Yoo Oh-seong

Yoo Oh-seong (유오성) has a rating of 1677, ranked 106 of 340 in korea play. Their highest rating so far is 1869 (December 28, 2023).

Yoo Oh-seong유오성兪旿成
Rating1677
Rank106
1-year change↓27
Peak rating1869
Last 10278-202(2 by default, 1 lost by default)
2026 record
0-2
Record since 1954
278-202
Win rate
.579

The rating is calculated from published game results. It does not include any adjustment for playing Black.

Korea ratingsFind a player

Rating history — korea

2 gamesHigh 1682Low 1677
66 gamesHigh 1869Low 1677
217 gamesHigh 1869Low 1665
477 gamesHigh 1869Low 1485

The “All” view starts at 1970; earlier years are used only to warm up the calculation and are not shown.

Recent games

Up to 20 games, newest first. “Change” is the rating movement.
DateOpponent and tournamentResultChange
July 17, 2026An SungjunSG杯 韓国日報 名人戦 Preliminary Round 1　as Black↓5
January 5, 2026Yoon Seo-wonGS Caltex杯 プロ棋戦 Preliminary Round 1　as White↓22
February 5, 2025Heo JaewonHana Bank囲碁SUPER MATCH 예선 2회차　as White↓21
February 4, 2025Jeong DaesangHana Bank囲碁SUPER MATCH 예선 1회차　as Black↑2
January 6, 2025Choi KyeonghoGS Caltex杯 プロ棋戦 예선 1회차　as White↓19
December 13, 2024Park Jinyoung한국 프로기사협회 리그 Group 2　as White↑17
December 11, 2024Lee Jaesung한국 프로기사협회 리그 Group 2　as Black↑19
December 10, 2024Gon Jiwoo한국 프로기사협회 리그 Group 2　as Black↓12
December 6, 2024Lee Yeon한국 프로기사협회 리그 Group 2　as Black↓19
December 5, 2024Kim Dabin한국 프로기사협회 리그 Group 2　as White↑22
December 4, 2024Park Jihyun한국 프로기사협회 리그 Group 2　as Black↓14
December 4, 2024Kwon Hyojin한국 프로기사협회 리그 Group 2　as Black↑22
November 29, 2024Kim Hyeongwoo한국 프로기사협회 리그 Group 2　as Black↑20
November 23, 2024Kim Sangcheon大統領杯 全国囲碁大会 プロ部門 예선 1회차　as White↓10
November 14, 2024Im KyungchanSUPER CUP BADUK OPEN 예선 3회차　as White↓21
November 14, 2024Kim Joo-hyungSUPER CUP BADUK OPEN 예선 2회차　as White↑12
November 12, 2024Kang Woohyuk한국 프로기사협회 리그 Group 2　as Black↓18
November 11, 2024An Choyeong한국 프로기사협회 리그 Group 2　as White↑13
November 11, 2024Yun Seongsik한국 프로기사협회 리그 Group 2　as White↓17
November 6, 2024Han Taehee한국바둑리그 1차예선 3국　as White↓23

Tournament names are shown in Korean, as the Korea Baduk Association writes them, unless an English name is known.

Round names are translated from the Korea Baduk Association's wording; those we cannot translate are left in Korean.

Record by year

Counted by calendar year, January to December, from Korea Baduk Association games only (default wins and losses are included; jigo and no-result games are not). Games from 1954 onward; international tournaments are not included.

YearRecordWin rate
20260-2.000
20251-2.333
202419-21.475
202344-28.611
202238-32.543
202145-16.738
202019-12.613
20197-6.538
201821-15.583
20178-12.400
201623-10.697
201528-19.596
201411-7.611
201314-20.412

Calculated from games played between 1954 and 2026 (as of September 22, 2026).