Format
OS
Oh, Sejun
🇰🇷FIDE 13216112· Male· South Korea· Born in 2014
Follow Sejun OhTrack his monthly FIDE ratings, games, tournaments and more.
Sejun Oh, a 12-year-old South Korean player, is rated 1783 — just 9 short of his peak of 1792 (Feb 2026, age 12). He is climbing fast, having gained +98 Elo over the past 12 months. 34 rated games in the past year (≈32/year long-term). Recent standard appearances include 33rd Korea Chess League Division 1 Round 5-6, 33rd Korea Chess League Div2 Round 3-4, and 33rd Korea Chess League Div2 Round 1-2. He reached South Korean #82 in Feb 2026.
At junior level, he reached #8, #2 and #2 nationally in U12, U10 and U8.
Current rating
1783
Standard
Rpd1690·Blz1699
All-time high
1792
−9 pts below
Feb 2026 · age 12
Feb 2026 · age 12
Activity
32
games / yr avg. · ≈3/mo
32 past 12 mo · ≈3/mo
classical only
Active
classical only
Active
Signature stat
#81,699
#81,699 · players worldwide · of 218,279
Career timeline
12 entries2026
Peak South Korean rank: #82
at age 12 · rated 1792
Feb 2026
8th South Korean U12 player
at age 12 · rated 1792
Feb 2026
All-time peak 1792
at age 12 · −9 from today
Feb 2026
2025
100 career games
at age 11
Nov 2025
2024
2nd South Korean U10 player
at age 10 · rated 1693
Jun 2024
Best 12-month gain (+479 Elo)
1156 → 1635
Mar 2024
Standard rating history
Peak
FIDE title
Threshold
First rated
FIDE recal.
Activity & highlights
Top opponent
Evolution
+98
1685 → 1783
Tournaments
10
34 games
Score
17.5/ 3451.5%
14W7D13L
Top 3 wins
Top 3 losses
Last 12 months — tournaments
10 events| Event | Date | Score | Rank | Perf | Δ Elo |
|---|---|---|---|---|---|
Team | May 2026 | 1/2 | #23 | 1744 | -4.8 |
Team | Apr 2026 | 1/2 | #21 | 1812 | +2.4 |
Team | Mar 2026 | 1/2 | #20 | 1666 | -13.6 |
Team | Mar 2026 | 1.5/2 | #8 | 1868 | +7.6 |
Swiss | Jan 2026 | 2.5/5 | #13 | 1756 | +8.0 |
Open Swiss | Dec 2025 | 3/9 | #94 | 1849 | +57.6 |
Team | Dec 2025 | 2/2 | #4 | 2414 | +32.8 |
Team | Nov 2025 | 0.5/2 | #17 | 1471 | -26.0 |
Open Swiss | Oct 2025 | 3.5/4 | #10 | 2092 | +14.8 |
Team | Aug 2025 | 1.5/2 | #5 | 1876 | +19.6 |
Most-Played Opponents
vsSeojun Jang
🇰🇷KOR·1738
+5 −1 =3
9 games·last met May 2025
View head-to-head →
vsHyunbin Choi
🇰🇷KOR·1665
+2 −3 =2
7 games·last met May 2025
View head-to-head →
vsJuwon Seo
🇰🇷KOR·1834
+1 −4 =1
6 games·last met Jun 2024
View head-to-head →
vsMinhyuk Park
🇰🇷KOR·1558
+5 −0 =0
5 games·last met Oct 2023
View head-to-head →
Rankings
/
South Korea
#110
out of 718 players
Asia-Pacific
#10,087
in continent
World
#81,697
out of 400,000+
National ranking
Europe & World
Europe
World
South Korea
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Asia-Pacific
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| 10087 | 1,783 | |
World
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