Format
Koellner, Ruben Gideon
IM🇩🇪FIDE 12993093· Male· Germany· Born in 2004
Follow Ruben Gideon KoellnerTrack his monthly FIDE ratings, games, tournaments and more.
Ruben Gideon Koellner, a 22-year-old German International Master, is rated 2530 — his current career high and ranked 21st among German players, and 408th worldwide. He is on a steady climb with +27 Elo over the past 12 months. 87 rated games in the past year (≈102/year long-term). Recent standard appearances include 1. Schachbundesliga 2025-2026 April 2026, grenke Chess Open 2026 A-Open, and 1. Muenster Oster Open - A. Also played 3 rapid (including Grand Prix PlusCity - Rapid Tournament 2025) and 2 blitz events (including Grand Prix PlusCity - Blitz Tournament 2025) recently. He reached World #408 in May 2026.
Awarded IM in 2021 (age 17) and FM in 2019 (age 15). Earned a GM norm at 1st International Munich Whitsun-Open A 2023. At junior level, he reached World #31 in U20, World #26 in U18, World #31 in U16, World #55 in U14, World #23 in U12 and #18 nationally in U10.
Current rating
2530
Standard
Rpd2425·Blz2384
All-time high
2530
at best
May 2026 · age 22
May 2026 · age 22
Activity
110
games / yr avg. · ≈9/mo
87 past 12 mo · ≈7/mo
classical only
Very active
classical only
Very active
Signature stat
#21
#21 · German players · of 13,806
Career timeline
22 entries2026
Peak German rank: #21
at age 22 · rated 2530
May 2026
Peak World rank: #408
at age 22 · rated 2530
May 2026
All-time peak 2530
at age 22
May 2026
2025
Crossed 2500
at age 21
May 2025
2024
1,000 career games
at age 20
Sep 2024
31st U20 player worldwide
at age 20 · rated 2490
Aug 2024
Standard rating history
Activity & highlights
Top opponent
Evolution
+27
2503 → 2530
Tournaments
16
96 games
Score
62/ 9664.6%
49W41D6L
Top 3 wins
2.[W]vsRobert ZelcicGM2,467·S: Zupanja Celebrates Chess- 70 Years of Pride and Tradition- GM Tournament 3·R1·+4.4
Top 3 losses
Last 12 months — tournaments
16 events| Event | Date | Score | Rank | Perf | Δ Elo |
|---|---|---|---|---|---|
Team | Apr 2026 | 2.5/3 | #3 | 2674 | +5.4 |
Open Swiss | Apr 2026 | 7.5/9 | #4 | 2648 | +15.1 |
Open Swiss | Mar 2026 | 6.5/8 | #3 | 2537 | +3.1 |
Team | Mar 2026 | 1/3 | #78 | 2355 | -6.5 |
Team | Feb 2026 | 0.5/1 | #117 | 2504 | -0.1 |
Team | Feb 2026 | 1/2 | #79 | 2468 | -1.3 |
Team | Jan 2026 | 2/2 | #4 | 3191 | +6.6 |
Team | Jan 2026 | 0.5/2 | #103 | 2284 | -6.1 |
Round-Robin | Dec 2025 | 7/9 | #2 | 2489 | -1.0 |
Team | Dec 2025 | 0.5/2 | #78 | 2188 | -8.8 |
Hot streak: 3 tournaments without losing Elo.
Most-Played Opponents
vsAlexander KrastevIM
🇩🇪GER·2428
+1 −3 =4
8 games·last met May 2025
View head-to-head →
vsAaron Noah KoellnerCM
🇩🇪GER·2213
+5 −1 =1
7 games·last met Mar 2023
View head-to-head →
vsJonathan CarlstedtIM
🇩🇪GER·2437
+0 −2 =4
6 games·last met Mar 2025
View head-to-head →
vsCedric ChassardFM
🇩🇪GER·2232
+4 −0 =1
5 games·last met Mar 2026
View head-to-head →
vsAshot ParvanyanIM
🇩🇪GER·2439
+2 −3 =0
5 games·last met Mar 2025
View head-to-head →
Rankings
/
Germany
#21
out of 15,291 players
Europe
#231
in continent
World
#408
out of 400,000+
National ranking
Europe & World
Europe
World
Germany
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| 5 | 🇩🇪Follow Dmitrij KollarsTrack their monthly FIDE ratings, games, tournaments and more. | 2,635 |
| 6 | 🇩🇪Follow Rasmus SvaneTrack their monthly FIDE ratings, games, tournaments and more. | 2,620 |
| 7 | 🇩🇪Follow Luis EngelTrack their monthly FIDE ratings, games, tournaments and more. | 2,593 |
| 8 | 🇩🇪Follow Fabian DoettlingTrack their monthly FIDE ratings, games, tournaments and more. | 2,592 |
| 9 | 🇩🇪Follow Dennis WagnerTrack their monthly FIDE ratings, games, tournaments and more. | 2,591 |
| 10 | 🇩🇪Follow Arik BraunTrack their monthly FIDE ratings, games, tournaments and more. | 2,587 |
| ... | ||
| 21 | 2,530 | |
Europe
| 1 | 🇳🇴Follow Magnus CarlsenTrack their monthly FIDE ratings, games, tournaments and more. | 2,840 |
| 2 | 🇳🇱Follow Anish GiriTrack their monthly FIDE ratings, games, tournaments and more. | 2,767 |
| 3 | 🇩🇪Follow Vincent KeymerTrack their monthly FIDE ratings, games, tournaments and more. | 2,759 |
| 3 | 🇫🇷Follow Alireza FirouzjaTrack their monthly FIDE ratings, games, tournaments and more. | 2,759 |
| 5 | 🇵🇱Follow Jan-Krzysztof DudaTrack their monthly FIDE ratings, games, tournaments and more. | 2,739 |
| 6 | 🇳🇱Follow Jorden Van ForeestTrack their monthly FIDE ratings, games, tournaments and more. | 2,735 |
| 7 | 🇭🇺Follow Richard RapportTrack their monthly FIDE ratings, games, tournaments and more. | 2,729 |
| 8 | 🇫🇷Follow Maxime Vachier-LagraveTrack their monthly FIDE ratings, games, tournaments and more. | 2,717 |
| 8 | 🇦🇿Follow Shakhriyar MamedyarovTrack their monthly FIDE ratings, games, tournaments and more. | 2,717 |
| 10 | 🇹🇷Follow Yagiz Kaan ErdogmusTrack their monthly FIDE ratings, games, tournaments and more. | 2,708 |
| ... | ||
| 231 | 2,530 | |
World
| 1 | 🇳🇴Follow Magnus CarlsenTrack their monthly FIDE ratings, games, tournaments and more. | 2,840 |
| 2 | 🇺🇸Follow Hikaru NakamuraTrack their monthly FIDE ratings, games, tournaments and more. | 2,792 |
| 3 | 🇺🇸Follow Fabiano CaruanaTrack their monthly FIDE ratings, games, tournaments and more. | 2,788 |
| 4 | 🇺🇿Follow Nodirbek AbdusattorovTrack their monthly FIDE ratings, games, tournaments and more. | 2,780 |
| 5 | 🇺🇿Follow Javokhir SindarovTrack their monthly FIDE ratings, games, tournaments and more. | 2,776 |
| 6 | 🇳🇱Follow Anish GiriTrack their monthly FIDE ratings, games, tournaments and more. | 2,767 |
| 7 | 🇩🇪Follow Vincent KeymerTrack their monthly FIDE ratings, games, tournaments and more. | 2,759 |
| 7 | 🇫🇷Follow Alireza FirouzjaTrack their monthly FIDE ratings, games, tournaments and more. | 2,759 |
| 9 | 🇺🇸Follow Wesley SoTrack their monthly FIDE ratings, games, tournaments and more. | 2,754 |
| 10 | 🇨🇳Follow Yi WeiTrack their monthly FIDE ratings, games, tournaments and more. | 2,753 |
| ... | ||
| 408 | 2,530 | |