Format
SJ
Sung, Jaehyun
🇰🇷FIDE 2656426· Male· South Korea· Born in 2004
Follow Jaehyun SungTrack his monthly FIDE ratings, games, tournaments and more.
Jaehyun Sung, a 22-year-old South Korean player, is rated 1776. He is progressing steadily with +20 Elo over the past 12 months. 72 rated games in the past year (≈60/year long-term). Recent standard appearances include 2026 Korea National Championship - Men, Via Hangawi Standard Open, and 1st CHESSFREAK Tournament. His peak of 1840 was reached at age 20 (Mar 2024); he also reached South Korean #24 in Dec 2023.
Competes for South Korea since Feb 2025. At junior level, he reached #3 nationally in U20.
Current rating
1776
Standard
Rpd1759·Blz—
All-time high
1840
−64 pts below
Mar 2024 · age 20
Mar 2024 · age 20
Activity
58
games / yr avg. · ≈5/mo
65 past 12 mo · ≈5/mo
classical only
Active
classical only
Active
Signature stat
#83,904
#83,904 · players worldwide · of 218,279
Career timeline
10 entries2025
100 career games
at age 21
Jul 2025
Switched federation: CAN → KOR
at age 21
Feb 2025
2024
K-factor lowered to 20
at age 20
Jun 2024
Best 12-month gain (+76 Elo)
1764 → 1840
Mar 2024
Crossed 1800
at age 20
Mar 2024
All-time peak 1840
at age 20 · −64 from today
Mar 2024
Standard rating history
Peak
FIDE title
Threshold
First rated
FIDE recal.
Activity & highlights
Evolution
+26
1750 → 1776
Tournaments
16
76 games
Score
52.5/ 7669.1%
48W9D19L
Top 3 wins
Top 3 losses
Last 12 months — tournaments
16 events| Event | Date | Score | Rank | Perf | Δ Elo |
|---|---|---|---|---|---|
Open Swiss | Feb 2026 | 2.5/6 | #46 | 1687 | -16.4 |
Open Swiss | Oct 2025 | 4/6 | #6 | 1938 | +27.0 |
Open Swiss | Oct 2025 | 3/4 | #17 | 1814 | -16.2 |
Team | Oct 2025 | 1/2 | #13 | 1683 | -5.0 |
Open Swiss | Sep 2025 | 5/5 | #3 | 2408 | +9.4 |
Open Swiss | Sep 2025 | 3/2 | #17 | 2303 | +9.2 |
Team | Aug 2025 | 2/3 | #23 | 1690 | -25.2 |
Swiss | Aug 2025 | 3/3 | #5 | 2416 | +17.6 |
Swiss | Aug 2025 | 3/2 | #15 | 2478 | +14.8 |
Swiss | Aug 2025 | 4/5 | #7 | 1848 | -11.8 |
Rankings
/
South Korea
#115
out of 718 players
Asia-Pacific
#10,411
in continent
World
#83,902
out of 400,000+
National ranking
Europe & World
Europe
World
South Korea
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