Yi Ch'ang-seok
Follow
311
Games
49%
Win rate
1
Titles
2–7
2026 Record
22.2%
Win Rate
9
Games
3L
Current Streak
As Black: 2/6 (33%)
As White: 0/3 (0%)
Key rivalries
Park Junghwan
3–11
Shin Minjun
2–9
Byun Sangil
4–7
Kim Myeong-hun
5–5
Kang Dongyun
3–5
Song Chi-hun
2–6
Tournaments
Korean Baduk League
Out
1W–2L
3 games
2026-01-26
Round 12 · League
KB Baduk League
Out
1W–1L
2 games
2026-02-08
League
6th Supreme Player 1st tournament
0W–1L
1 game
2026-03-10
Korean President's Cup
Out
0W–1L
1 game
2026-10-07
Preliminary
Maxim Cup #27
Out
0W–1L
1 game
2026-01-19
Round 1
Sopalcosanol Best Player #6
Out
0W–1L
1 game
2026-04-22
Round of 16
Key Opponents in 2026
| Opponent | Games | Record | Split |
|---|---|---|---|
| An Kuk-hyeon 🇰🇷 | 1 | 0–1 | |
| Kim Hyeong-u 🇰🇷 | 1 | 0–1 | |
| Lee Jihyun | 1 | 0–1 | |
| Choi Minseo (2007) 🇰🇷 | 1 | 1–0 | |
| Na Hyeon 🇰🇷 | 1 | 0–1 | |
| Byun Sangil 🇰🇷 | 1 | 0–1 | |
| Cho Hanseung 🇰🇷 | 1 | 0–1 | |
| Han T'ae-heui 🇰🇷 | 1 | 0–1 | |
| Yi Chae-seong 🇰🇷 | 1 | 1–0 |
Games
| Date | Opponent | Color | Result | Event | Round |
|---|---|---|---|---|---|
| 2026-10-07 | An Kuk-hyeon | B | W+0.5 | Korean President's Cup | Preliminary |
| 2026-04-22 | Kim Hyeong-u | W | B+R | Sopalcosanol Best Player | Round of 16 |
| 2026-03-10 | Lee Jihyun | B | W+R | 6th Supreme Player 1st tournament | |
| 2026-02-08 | Choi Minseo (2007) | B | B+3.5 | KB Baduk League | League |
| 2026-01-30 | Na Hyeon | W | B+R | KB Baduk League | League |
| 2026-01-26 | Byun Sangil | B | W+R | Korean Baduk League | Round 12 |
| 2026-01-19 | Cho Hanseung | B | W+R | Maxim Cup | Round 1 |
| 2026-01-10 | Han T'ae-heui | W | B+2.5 | Korean Baduk League | |
| 2026-01-04 | Yi Chae-seong | B | B+R | Korean Baduk League | League |