Players
Photo: Türkiye Satranç Federasyonu
IM
Ruben Gideon Koellner
Luft classical
FIDE classical
Trophy cabinet
No classical titles on record yet.
Luft classical rating
Not ranked yet: the Luft classical rating needs at least 10 classical games in top events over the last year.
Openings
Their most-played, from 22 classical games in top events over the last 4 years
| Opening | Games | Score |
|---|---|---|
| Queen's Pawn Game | 6 | 50% |
| East Indian Defense | 3 | 67% |
| Caro-Kann Defense | 1 | 50% |
| Trompowsky Attack | 1 | 0% |
| Opening | Games | Score |
|---|---|---|
| Queen's Gambit Declined | 3 | 50% |
| King's Indian Attack | 2 | 50% |
| Indian Defense | 2 | 0% |
| Old Indian Defense | 1 | 50% |
| Ruy Lopez | 1 | 50% |
Recent events
See allBest wins
| Opponent | Rating |
|---|---|
| GMG. Kjartansson24 Apr 2026 · German Bundesliga 2025/26 | 2407 |
| A. Hoenig1 Apr 2023 · Bundesliga 2022 | 2214 |
Most played
| Opponent | Games | WDL |
|---|---|---|
| GME. BacrotLast 1 Mar 2026 · German Bundesliga 2025/26 | 2 | 020 |
| A. HoenigLast 1 Apr 2023 · Bundesliga 2022 | 1 | 100 |
| IMG. HalvaxLast 2 Apr 2023 · Bundesliga 2022 | 1 | 010 |
| IMJ. WegerleLast 22 Oct 2023 · Bundesliga 2023/24 | 1 | 010 |
| IMB. MaksimovicLast 4 Aug 2024 · Grand Prix Romania 2024 | 1 | 010 |
FIDE rapid
Trophy cabinet
No rapid titles on record yet.
Luft rapid rating
Not ranked yet: the Luft rapid rating needs at least 10 rapid games in top events over the last year.
Openings
Their most-played, from 7 rapid games in top events over the last 4 years
| Opening | Games | Score |
|---|---|---|
| Indian Defense | 2 | 50% |
| Queen's Pawn Game | 2 | 25% |
| Opening | Games | Score |
|---|---|---|
| Queen's Pawn Game | 1 | 100% |
| Old Indian Defense | 1 | 0% |
| Indian Defense | 1 | 0% |
Recent events
| Event | Place | +/− | +/− |
|---|---|---|---|
| Grand Prix PlusCity1 Jun 2025 | 4/9 | +13+11 |
Best wins
| Opponent | Rating |
|---|---|
| GMM. Rodshtein30 May 2025 · Grand Prix PlusCity | 2603 |
| GME. Hansen30 May 2025 · Grand Prix PlusCity | 2582 |
| IMT. Injac1 Jun 2025 · Grand Prix PlusCity | 2309 |
Most played
| Opponent | Games | WDL |
|---|---|---|
| GME. HansenLast 30 May 2025 · Grand Prix PlusCity | 1 | 100 |
| GMA. ShimanovLast 30 May 2025 · Grand Prix PlusCity | 1 | 010 |
| GMM. RodshteinLast 30 May 2025 · Grand Prix PlusCity | 1 | 100 |
| GMA. SaranaLast 30 May 2025 · Grand Prix PlusCity | 1 | 001 |
| GMP. TeclafLast 30 May 2025 · Grand Prix PlusCity | 1 | 001 |
FIDE blitz
Trophy cabinet
No blitz titles on record yet.
Luft blitz rating
Not ranked yet: the Luft blitz rating needs at least 10 blitz games in top events over the last year.
Openings
No blitz games with a known opening in our archive yet.
Recent events
| Event | Place | +/− | +/− |
|---|---|---|---|
| Grand Prix PlusCity31 May 2025 | 1½/4 | +11+11 |
Best wins
| Opponent | Rating |
|---|---|
| GMN. Short31 May 2025 · Grand Prix PlusCity | 2566 |
Most played
| Opponent | Games | WDL |
|---|---|---|
| GMN. ShortLast 31 May 2025 · Grand Prix PlusCity | 1 | 100 |
| GMN. PetrovLast 31 May 2025 · Grand Prix PlusCity | 1 | 001 |
| GMZ. KozulLast 31 May 2025 · Grand Prix PlusCity | 1 | 010 |
| GMG. MeierLast 31 May 2025 · Grand Prix PlusCity | 1 | 001 |