Format
RK
Rehnberg, Karl-Oskar
🇸🇪FIDE 1781995· Male· Sweden· Born in 2008
Follow Karl-Oskar RehnbergTrack his monthly FIDE ratings, games, tournaments and more.
Karl-Oskar Rehnberg, a 18-year-old Swedish player, is rated 2035 — just 10 short of his peak of 2045 (Jan 2026, age 18). He is on a breakout run, having gained +224 Elo over the past 12 months. 32 rated games in the past year (≈29/year long-term). Recent standard appearances include Orebromasterskapet 2025-2026 R67, Allsvenskan 2025-2026: II:4 r5-6, and Karlstad Open 2025 std. Also played 8 rapid (including Stockholm Grand Prix 2025 rpd) and 2 blitz events (including SM-Blixten 2025) recently.
At junior level, he reached #10 and #54 nationally in U18 and U16.
Current rating
2035
Standard
Rpd1925·Blz1963
All-time high
2045
−10 pts below
Jan 2026 · age 18
Jan 2026 · age 18
Activity
28
games / yr avg. · ≈2/mo
32 past 12 mo · ≈3/mo
classical only
Moderately active
classical only
Moderately active
Signature stat
#22,546
#22,546 · players worldwide · of 216,807
Career timeline
7 entries2026
10th Swedish U18 player
at age 18 · rated 2045
Jan 2026
Best 12-month gain (+378 Elo)
1667 → 2045
Jan 2026
All-time peak 2045
at age 18 · −10 from today
Jan 2026
2025
Crossed 2000
at age 17
Dec 2025
Crossed 1800
at age 17
Mar 2025
2024
54th Swedish U16 player
at age 16 · rated 1659
Dec 2024
Standard rating history
Activity & highlights
Evolution
+224
1811 → 2035
Tournaments
11
33 games
Score
23.5/ 3371.2%
21W5D7L
Top 3 wins
Top 3 losses
Last 12 months — tournaments
10 events| Event | Date | Score | Rank | Perf | Δ Elo |
|---|---|---|---|---|---|
Swiss | Feb 2026 | 1/2 | #11 | 1838 | -17.6 |
Team | Feb 2026 | 1/1 | #17 | 2808 | +17.6 |
Open Swiss | Dec 2025 | 4.5/5 | #27 | 2221 | -9.6 |
Swiss | Dec 2025 | 1/1 | #9 | 2724 | +14.4 |
Team | Nov 2025 | 1/1 | #14 | 2454 | +4.8 |
Swiss | Nov 2025 | 1.5/2 | #3 | 2062 | +7.6 |
Open Swiss | Nov 2025 | 2.5/4 | #35 | 2129 | +36.0 |
Swiss | Oct 2025 | 1/1 | #3 | 2438 | +4.8 |
Open Swiss | Aug 2025 | 2/4 | #21 | 2092 | +42.0 |
Round-Robin | Aug 2025 | 3.5/5 | #2 | 2109 | +62.8 |
Rankings
/
Sweden
#469
out of 3,415 players
Europe
#16,603
in continent
World
#22,546
out of 400,000+
National ranking
Europe & World
Europe
World
Sweden
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Europe
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World
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| 22546 | 2,035 | |