Ruben Gideon Koellner

Country

GER

Birth Year

2004

Gender

M

Title

International Master

FIDE ID

12993093

FIDE ratings

2535

Classical

Published FIDE

2425

Rapid

Published FIDE

2384

Blitz

Published FIDE

Official classical ranks

World rank
#371
National rank · GER
#20

Active players · Oct 2026 FIDE list ⓘ

Rating history

Highest recorded rating
2535 Oct 2026
Recorded years
2014–2026
Archived games
2256

Based on available monthly lists and saved games.

FIDE rating history

Published rating lists through Oct 2026.

View rating lists
Available Games

Published games available in our archive; coverage varies by tournament. Archive last checked: 2026-10-07 (UTC).

# Date Event Site Round White Black Result Moves View
1 2026-09-01 Titled Tue 1st Sep 2026 chess.com INT 4 Koellner,Ruben Gideon Hnatyshyn,Anastasiia 1-0 50 Open
2 2026-09-01 Titled Tue 1st Sep 2026 chess.com INT 2 Sargissyan,S Koellner,Ruben Gideon 0-1 45 Open
3 2026-09-01 Titled Tue 1st Sep 2026 chess.com INT 7 Koellner,Ruben Gideon Shearsby,Jude 1-0 36 Open
4 2026-09-01 Titled Tue 1st Sep 2026 chess.com INT 6 Materia,Marco Koellner,Ruben Gideon 1-0 36 Open
5 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
6 2026-09-01 Titled Tue 1st Sep 2026 chess.com INT 3 Nesterov,Arseniy Koellner,Ruben Gideon 1-0 56 Open
7 2026-09-01 Titled Tue 1st Sep 2026 chess.com INT 11 Zharas,Aldiyar Koellner,Ruben Gideon 0-1 105 Open
8 2026-09-01 Titled Tue 1st Sep 2026 chess.com INT 1 Koellner,Ruben Gideon Muzis,Renars 1/2-1/2 46 Open
9 2026-09-01 Titled Tue 1st Sep 2026 chess.com INT 9 Bok,B Koellner,Ruben Gideon 1-0 55 Open
10 2026-09-01 Titled Tue 1st Sep 2026 chess.com INT 5 Kiringoda,Thehas Rithmitha Koellner,Ruben Gideon 0-1 129 Open
11 2026-09-01 Titled Tue 1st Sep 2026 chess.com INT 8 Koellner,Ruben Gideon Drygalov,Andrey 1-0 55 Open
12 2026-06-02 Titled Tue 2nd Jun 2026 chess.com INT 3 Budrewicz,K Koellner,Ruben Gideon 1-0 92 Open
13 2026-06-02 Titled Tue 2nd Jun 2026 chess.com INT 1 Harriott,Tyrell Koellner,Ruben Gideon 0-1 68 Open
14 2026-06-02 Titled Tue 2nd Jun 2026 chess.com INT 2 Koellner,Ruben Gideon Terry,R 0-1 46 Open
15 2026-04-26 Bundesliga 2025-26 Berlin GER 15.5 Schaefer,Mark Koellner,Ruben Gideon 0-1 42 Open
16 2026-04-25 Bundesliga 2025-26 Berlin GER 14.6 Koellner,Ruben Gideon Levin,F 1/2-1/2 88 Open
17 2026-04-24 Bundesliga 2025-26 Berlin GER 13.6 Koellner,Ruben Gideon Kjartansson,G 1-0 31 Open
18 2026-04-06 grenke Chess Open 2026 Karlsruhe GER 8.4 Karthik,V4 Koellner,Ruben Gideon 1/2-1/2 25 Open
19 2026-04-06 grenke Chess Open 2026 Karlsruhe GER 9.9 Koellner,Ruben Gideon Abdurakhmonov,Mukhammadali 1-0 23 Open
20 2026-04-05 grenke Chess Open 2026 Karlsruhe GER 7.14 Kalogridis,Antonios Koellner,Ruben Gideon 0-1 64 Open
21 2026-04-05 grenke Chess Open 2026 Karlsruhe GER 6.11 Koellner,Ruben Gideon Willems,Niels 1/2-1/2 40 Open
22 2026-04-04 grenke Chess Open 2026 Karlsruhe GER 4.11 Koellner,Ruben Gideon Collins,Adam 1-0 51 Open
23 2026-04-04 grenke Chess Open 2026 Karlsruhe GER 5.1 Hong,Andrew Koellner,Ruben Gideon 1/2-1/2 53 Open
24 2026-04-03 grenke Chess Open 2026 Karlsruhe GER 3.13 Zeller,F Koellner,Ruben Gideon 0-1 47 Open
25 2026-04-03 grenke Chess Open 2026 Karlsruhe GER 2.19 Koellner,Ruben Gideon Van Batenburg,Mees 1-0 37 Open
26 2026-04-02 grenke Chess Open 2026 Karlsruhe GER 1.21 Asici,Poyraz Efe Koellner,Ruben Gideon 0-1 41 Open
27 2026-03-22 Bundesliga 2025-26 Deizisau GER 10.7 Schmidek,Emil Koellner,Ruben Gideon 1/2-1/2 42 Open
28 2026-03-21 Bundesliga 2025-26 Deizisau GER 9.7 Koellner,Ruben Gideon Moehn,H 0-1 51 Open
29 2026-03-01 Bundesliga 2025-26 Munich GER 8.4 Bacrot,E Koellner,Ruben Gideon 1/2-1/2 68 Open
30 2026-02-28 Bundesliga 2025-26 Munich GER 7.4 Koellner,Ruben Gideon Krejci,Jan2 1/2-1/2 55 Open
31 2026-01-11 Bundesliga 2025-26 Deggendorf GER 12.2 Alvar Alonso Rosell Ruben Gideon Koellner 1-0 34 Open
32 2026-01-10 Bundesliga 2025-26 Deggendorf GER 11.1 Ruben Gideon Koellner Dalibor Stojanovic 1/2-1/2 46 Open
33 2025-12-30 IM-Turnier im Atomis 2025 Oberding GER 7.5 Ruben Gideon Koellner Darshan G 1-0 18 Open
34 2025-12-29 IM-Turnier im Atomis 2025 Oberding GER 6.1 Lukas Stoettner Ruben Gideon Koellner 1-0 33 Open
35 2025-12-28 IM-Turnier im Atomis 2025 Oberding GER 5.5 Hemanth Raam Ruben Gideon Koellner 0-1 45 Open
36 2025-12-28 IM-Turnier im Atomis 2025 Oberding GER 4.2 Ruben Gideon Koellner Elias Wunderlich 1-0 44 Open
37 2025-12-27 IM-Turnier im Atomis 2025 Oberding GER 3.4 Richard Walter Ruben Gideon Koellner 0-1 36 Open
38 2025-12-27 IM-Turnier im Atomis 2025 Oberding GER 2.3 Ruben Gideon Koellner Robert Zysk 1-0 65 Open
39 2025-12-26 IM-Turnier im Atomis 2025 Oberding GER 1.3 Petro Logvinov Ruben Gideon Koellner 1/2-1/2 23 Open
40 2025-11-16 Rainer Radtke Mem Rapid Berlin GER 9.12 Ruben Gideon Koellner Timo Kueppers 0-1 80 Open
41 2025-11-16 Rainer Radtke Mem Rapid Berlin GER 10.9 Marcel Petersen Ruben Gideon Koellner 0-1 33 Open
42 2025-11-15 Rainer Radtke Mem Rapid Berlin GER 7.1 Ruben Gideon Koellner Magnus Ermitsch 0-1 55 Open
43 2025-11-15 Rainer Radtke Mem Rapid Berlin GER 6.3 Roven Vogel Ruben Gideon Koellner 1-0 37 Open
44 2025-11-15 Rainer Radtke Mem Rapid Berlin GER 5.1 Ruben Gideon Koellner Jonas Eilenberg 1-0 50 Open
45 2025-11-15 Rainer Radtke Mem Rapid Berlin GER 4.12 Simon Degenhard Ruben Gideon Koellner 0-1 77 Open
46 2025-11-15 Rainer Radtke Mem Rapid Berlin GER 3.13 Ruben Gideon Koellner Benjamin Wagner 1/2-1/2 44 Open
47 2025-11-15 Rainer Radtke Mem Rapid Berlin GER 2.12 Momme Fredrik Held Ruben Gideon Koellner 1-0 47 Open
48 2025-11-15 Rainer Radtke Mem Rapid Berlin GER 1.13 Ruben Gideon Koellner Alina Damrich 1-0 34 Open
49 2025-08-18 Abu Dhabi Masters Online chess.com INT 4 Sharath Radhakrishnan Ruben Gideon Koellner 1-0 47 Open
50 2025-08-18 Abu Dhabi Masters Online chess.com INT 3 Ruben Gideon Koellner Mikkel Vinh Loftgaard 1/2-1/2 71 Open

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