Male
FIDE ID:
Ruben Gideon Koellner
Last tournaments played
| Tournament | Date | Elo Avg. | Country |
| TCh-AUT 2024-25 | 10/09/2024 | 2378 |  Austria |
| Bundesliga 2023-24 | 10/21/2023 | 2474 |  Germany |
| Rainer Radtke Mem 2024 | 10/21/2024 | 2292 | Germany |
| Bundesliga 2023-24 | 10/21/2023 | 2508 | Germany |
Ruben Gideon Koellner Opening Repertoire with White pieces
| ECO | Opening | Games |
| A45 | Queen's pawn game | 27 games |
| D02 | Queen's pawn game | 19 games |
| A40 | Queen's pawn | 11 games |
| A48 | King's Indian, East Indian defence | 9 games |
Ruben Gideon Koellner Opening Repertoire with Black pieces
| ECO | Opening | Games |
| C41 | Philidor's defence | 28 games |
| D37 | Queen's Gambit Declined, 4.Nf3 | 9 games |
| A41 | Queen's Pawn | 7 games |
| C78 | Ruy Lopez, 5.O-O | 6 games |
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