IM Ruben Gideon Koellner
Country
GER
Birth Year
2004 (Age ≈22)
Gender
M
Title
International Master
FIDE ID
12993093
FIDE rating history
View rating lists
Available Games
Published games available in our archive; coverage varies by tournament. Archive last checked: 2026-10-24 (UTC).
Online games are identified from known tournament names, playing sites and PGN mode. Other games are listed as OTB (over-the-board).
| # | Date | Event | Site | Round | White | Black | Result | Moves | View |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 2026-10-11 | German Bundesliga 2026/27 (Schachbundesliga) | Germany | 3.6 | Koellner, Ruben Gideon | Royal, Shreyas | 0-1 | 51 | Open |
| 2 | 2026-10-10 | Bundesliga 2026-27 | Remagen GER | 2.4 | Koellner,Ruben Gideon | Sedlak,N | 1/2-1/2 | 65 | Open |
| 3 | 2026-10-09 | Bundesliga 2026-27 | Remagen GER | 1.3 | Lagarde,Max | Koellner,Ruben Gideon | 1-0 | 42 | Open |
| 4 | 2026-09-01 | Titled Tue 1st Sep 2026 | chess.com INT | 4 | Koellner,Ruben Gideon | Hnatyshyn,Anastasiia | 1-0 | 50 | Open |
| 5 | 2026-09-01 | Titled Tue 1st Sep 2026 | chess.com INT | 2 | Sargissyan,S | Koellner,Ruben Gideon | 0-1 | 45 | Open |
| 6 | 2026-09-01 | Titled Tue 1st Sep 2026 | chess.com INT | 7 | Koellner,Ruben Gideon | Shearsby,Jude | 1-0 | 36 | Open |
| 7 | 2026-09-01 | Titled Tue 1st Sep 2026 | chess.com INT | 6 | Materia,Marco | Koellner,Ruben Gideon | 1-0 | 36 | Open |
| 8 | 2026-09-01 | Titled Tue 1st Sep 2026 | chess.com INT | 10 | Koellner,Ruben Gideon | Nguyen Truong An Khang | 1/2-1/2 | 57 | Open |
| 9 | 2026-09-01 | Titled Tue 1st Sep 2026 | chess.com INT | 3 | Nesterov,Arseniy | Koellner,Ruben Gideon | 1-0 | 56 | Open |
| 10 | 2026-09-01 | Titled Tue 1st Sep 2026 | chess.com INT | 11 | Zharas,Aldiyar | Koellner,Ruben Gideon | 0-1 | 105 | Open |
| 11 | 2026-09-01 | Titled Tue 1st Sep 2026 | chess.com INT | 1 | Koellner,Ruben Gideon | Muzis,Renars | 1/2-1/2 | 46 | Open |
| 12 | 2026-09-01 | Titled Tue 1st Sep 2026 | chess.com INT | 9 | Bok,B | Koellner,Ruben Gideon | 1-0 | 55 | Open |
| 13 | 2026-09-01 | Titled Tue 1st Sep 2026 | chess.com INT | 5 | Kiringoda,Thehas Rithmitha | Koellner,Ruben Gideon | 0-1 | 129 | Open |
| 14 | 2026-09-01 | Titled Tue 1st Sep 2026 | chess.com INT | 8 | Koellner,Ruben Gideon | Drygalov,Andrey | 1-0 | 55 | Open |
| 15 | 2026-06-02 | Titled Tue 2nd Jun 2026 | chess.com INT | 3 | Budrewicz,K | Koellner,Ruben Gideon | 1-0 | 92 | Open |
| 16 | 2026-06-02 | Titled Tue 2nd Jun 2026 | chess.com INT | 1 | Harriott,Tyrell | Koellner,Ruben Gideon | 0-1 | 68 | Open |
| 17 | 2026-06-02 | Titled Tue 2nd Jun 2026 | chess.com INT | 2 | Koellner,Ruben Gideon | Terry,R | 0-1 | 46 | Open |
| 18 | 2026-04-26 | Bundesliga 2025-26 | Berlin GER | 15.5 | Schaefer,Mark | Koellner,Ruben Gideon | 0-1 | 42 | Open |
| 19 | 2026-04-25 | Bundesliga 2025-26 | Berlin GER | 14.6 | Koellner,Ruben Gideon | Levin,F | 1/2-1/2 | 88 | Open |
| 20 | 2026-04-24 | Bundesliga 2025-26 | Berlin GER | 13.6 | Koellner,Ruben Gideon | Kjartansson,G | 1-0 | 31 | Open |
| 21 | 2026-04-06 | grenke Chess Open 2026 | Karlsruhe GER | 8.4 | Karthik,V4 | Koellner,Ruben Gideon | 1/2-1/2 | 25 | Open |
| 22 | 2026-04-06 | grenke Chess Open 2026 | Karlsruhe GER | 9.9 | Koellner,Ruben Gideon | Abdurakhmonov,Mukhammadali | 1-0 | 23 | Open |
| 23 | 2026-04-05 | grenke Chess Open 2026 | Karlsruhe GER | 7.14 | Kalogridis,Antonios | Koellner,Ruben Gideon | 0-1 | 64 | Open |
| 24 | 2026-04-05 | grenke Chess Open 2026 | Karlsruhe GER | 6.11 | Koellner,Ruben Gideon | Willems,Niels | 1/2-1/2 | 40 | Open |
| 25 | 2026-04-04 | grenke Chess Open 2026 | Karlsruhe GER | 4.11 | Koellner,Ruben Gideon | Collins,Adam | 1-0 | 51 | Open |
| 26 | 2026-04-04 | grenke Chess Open 2026 | Karlsruhe GER | 5.1 | Hong,Andrew | Koellner,Ruben Gideon | 1/2-1/2 | 53 | Open |
| 27 | 2026-04-03 | grenke Chess Open 2026 | Karlsruhe GER | 3.13 | Zeller,F | Koellner,Ruben Gideon | 0-1 | 47 | Open |
| 28 | 2026-04-03 | grenke Chess Open 2026 | Karlsruhe GER | 2.19 | Koellner,Ruben Gideon | Van Batenburg,Mees | 1-0 | 37 | Open |
| 29 | 2026-04-02 | grenke Chess Open 2026 | Karlsruhe GER | 1.21 | Asici,Poyraz Efe | Koellner,Ruben Gideon | 0-1 | 41 | Open |
| 30 | 2026-03-22 | Bundesliga 2025-26 | Deizisau GER | 10.7 | Schmidek,Emil | Koellner,Ruben Gideon | 1/2-1/2 | 42 | Open |
| 31 | 2026-03-21 | Bundesliga 2025-26 | Deizisau GER | 9.7 | Koellner,Ruben Gideon | Moehn,H | 0-1 | 51 | Open |
| 32 | 2026-03-01 | Bundesliga 2025-26 | Munich GER | 8.4 | Bacrot,E | Koellner,Ruben Gideon | 1/2-1/2 | 68 | Open |
| 33 | 2026-02-28 | Bundesliga 2025-26 | Munich GER | 7.4 | Koellner,Ruben Gideon | Krejci,Jan2 | 1/2-1/2 | 55 | Open |
| 34 | 2026-01-11 | Bundesliga 2025-26 | Deggendorf GER | 12.2 | Alvar Alonso Rosell | Ruben Gideon Koellner | 1-0 | 34 | Open |
| 35 | 2026-01-10 | Bundesliga 2025-26 | Deggendorf GER | 11.1 | Ruben Gideon Koellner | Dalibor Stojanovic | 1/2-1/2 | 46 | Open |
| 36 | 2025-12-30 | IM-Turnier im Atomis 2025 | Oberding GER | 7.5 | Ruben Gideon Koellner | Darshan G | 1-0 | 18 | Open |
| 37 | 2025-12-29 | IM-Turnier im Atomis 2025 | Oberding GER | 6.1 | Lukas Stoettner | Ruben Gideon Koellner | 1-0 | 33 | Open |
| 38 | 2025-12-28 | IM-Turnier im Atomis 2025 | Oberding GER | 5.5 | Hemanth Raam | Ruben Gideon Koellner | 0-1 | 45 | Open |
| 39 | 2025-12-28 | IM-Turnier im Atomis 2025 | Oberding GER | 4.2 | Ruben Gideon Koellner | Elias Wunderlich | 1-0 | 44 | Open |
| 40 | 2025-12-27 | IM-Turnier im Atomis 2025 | Oberding GER | 3.4 | Richard Walter | Ruben Gideon Koellner | 0-1 | 36 | Open |
| 41 | 2025-12-27 | IM-Turnier im Atomis 2025 | Oberding GER | 2.3 | Ruben Gideon Koellner | Robert Zysk | 1-0 | 65 | Open |
| 42 | 2025-12-26 | IM-Turnier im Atomis 2025 | Oberding GER | 1.3 | Petro Logvinov | Ruben Gideon Koellner | 1/2-1/2 | 23 | Open |
| 43 | 2025-11-16 | Rainer Radtke Mem Rapid | Berlin GER | 9.12 | Ruben Gideon Koellner | Timo Kueppers | 0-1 | 80 | Open |
| 44 | 2025-11-16 | Rainer Radtke Mem Rapid | Berlin GER | 10.9 | Marcel Petersen | Ruben Gideon Koellner | 0-1 | 33 | Open |
| 45 | 2025-11-15 | Rainer Radtke Mem Rapid | Berlin GER | 7.1 | Ruben Gideon Koellner | Magnus Ermitsch | 0-1 | 55 | Open |
| 46 | 2025-11-15 | Rainer Radtke Mem Rapid | Berlin GER | 6.3 | Roven Vogel | Ruben Gideon Koellner | 1-0 | 37 | Open |
| 47 | 2025-11-15 | Rainer Radtke Mem Rapid | Berlin GER | 5.1 | Ruben Gideon Koellner | Jonas Eilenberg | 1-0 | 50 | Open |
| 48 | 2025-11-15 | Rainer Radtke Mem Rapid | Berlin GER | 4.12 | Simon Degenhard | Ruben Gideon Koellner | 0-1 | 77 | Open |
| 49 | 2025-11-15 | Rainer Radtke Mem Rapid | Berlin GER | 3.13 | Ruben Gideon Koellner | Benjamin Wagner | 1/2-1/2 | 44 | Open |
| 50 | 2025-11-15 | Rainer Radtke Mem Rapid | Berlin GER | 2.12 | Momme Fredrik Held | Ruben Gideon Koellner | 1-0 | 47 | Open |
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