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Player profile

Koellner, Ruben Gideon

Standard: 2526 Rapid: 2441 Blitz: 2377 (last updated 2026-11-02)
FIDE ID: 12993093 (view FIDE profile)
Federation: GER Sex: M Birth Year: 2004 Age: 22
Title: IM Women's title: — Other title: — FOA title: —
Games: 252 Wins: 113 (45%) Draws: 89 (35%) Losses: 48 (19%) Other: 2
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Dossier

244 of 252 games analyzed.

Accuracy: 92.3%
Opened d4: 73/75Opened Nf3: 2/75
Castled kingside: 112Same-side castling: 98Did not castle: 22Castled queenside: 12Opposite-side castling: 11
Played in the center: 57Played on the kingside: 43Played on the queenside: 38Fianchettoed queenside: 26Fianchettoed kingside: 18
Active pieces: 102Sacrificed material: 99Initiated exchanges: 98Kept the bishop pair: 89Space advantage: 73Backward pawn: 69Isolated pawn: 68Avoided exchanges: 25Missed tactics: 14Played gambits: 8
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Openings

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As White 79 games 36W 28D 15L
Queen's Pawn Game 43 games 21W 15D 7L
Colle System 19 games 7W 9D 3L
(unspecified) 16 games 5W 8D 3L
Anti-Colle 3 games 2W 1D 0L
London System 8 games 6W 2D 0L
(unspecified) 6 games 5W 1D 0L
with e6 2 games 1W 1D 0L
Symmetrical Variation 6 games 3W 2D 1L
(unspecified) 6 games 3W 2D 1L
Krause Variation 4 games 2W 0D 2L
(unspecified) 4 games 2W 0D 2L
Zukertort Variation 3 games 1W 1D 1L
(unspecified) 3 games 1W 1D 1L
Torre Attack 2 games 1W 1D 0L
(unspecified) 2 games 1W 1D 0L
(unspecified) 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
Trompowsky Attack 13 games 6W 5D 2L
(unspecified) 9 games 3W 4D 2L
(unspecified) 9 games 3W 4D 2L
Poisoned Pawn Variation 2 games 2W 0D 0L
(unspecified) 2 games 2W 0D 0L
Classical Defense 2 games 1W 1D 0L
(unspecified) 2 games 1W 1D 0L
East Indian Defense 10 games 3W 5D 2L
(unspecified) 10 games 3W 5D 2L
(unspecified) 10 games 3W 5D 2L
Indian Defense 5 games 3W 1D 1L
Knights Variation 4 games 2W 1D 1L
(unspecified) 4 games 2W 1D 1L
London System 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
Caro-Kann Defense 2 games 0W 1D 1L
Exchange Variation 2 games 0W 1D 1L
(unspecified) 2 games 0W 1D 1L
Horwitz Defense 2 games 0W 0D 2L
(unspecified) 2 games 0W 0D 2L
(unspecified) 2 games 0W 0D 2L
Pirc Defense 1 game 0W 1D 0L
(unspecified) 1 game 0W 1D 0L
(unspecified) 1 game 0W 1D 0L
Zukertort Opening 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
Pterodactyl Defense 1 game 1W 0D 0L
Eastern 1 game 1W 0D 0L
Benoni 1 game 1W 0D 0L
Benoni Defense 1 game 1W 0D 0L
Semi-Benoni 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
As Black 75 games 38W 26D 11L
Philidor Defense 15 games 11W 4D 0L
Lion Variation 13 games 10W 3D 0L
(unspecified) 13 games 10W 3D 0L
Exchange Variation 2 games 1W 1D 0L
(unspecified) 2 games 1W 1D 0L
Ruy Lopez 11 games 6W 4D 1L
Morphy Defense 8 games 5W 3D 0L
Møller Variation 6 games 3W 3D 0L
Classical Defense Deferred 1 game 1W 0D 0L
Anderssen Variation 1 game 1W 0D 0L
Classical Variation 2 games 1W 1D 0L
(unspecified) 1 game 1W 0D 0L
Zukertort Gambit 1 game 0W 1D 0L
Bird Variation 1 game 0W 0D 1L
(unspecified) 1 game 0W 0D 1L
Pirc Defense 9 games 6W 2D 1L
(unspecified) 9 games 6W 2D 1L
(unspecified) 9 games 6W 2D 1L
Indian Defense 8 games 4W 0D 4L
Wade-Tartakower Defense 8 games 4W 0D 4L
(unspecified) 8 games 4W 0D 4L
English Opening 7 games 3W 3D 1L
Agincourt Defense 4 games 2W 2D 0L
Catalan Defense Accepted 3 games 1W 2D 0L
(unspecified) 1 game 1W 0D 0L
Anglo-Indian Defense 1 game 1W 0D 0L
King's Knight Variation 1 game 1W 0D 0L
(unspecified) 1 game 0W 0D 1L
(unspecified) 1 game 0W 0D 1L
King's English Variation 1 game 0W 1D 0L
(unspecified) 1 game 0W 1D 0L
Italian Game 6 games 1W 4D 1L
Classical Variation 3 games 0W 2D 1L
Greco Gambit, Modern Line 2 games 0W 2D 0L
Giuoco Pianissimo 1 game 0W 0D 1L
Giuoco Piano 1 game 0W 1D 0L
(unspecified) 1 game 0W 1D 0L
Evans Gambit 1 game 1W 0D 0L
Main Line 1 game 1W 0D 0L
Giuoco Pianissimo 1 game 0W 1D 0L
Italian Four Knights Variation 1 game 0W 1D 0L
Queen's Gambit Declined 4 games 0W 3D 1L
Exchange Variation 2 games 0W 1D 1L
Positional Variation 1 game 0W 0D 1L
Reshevsky Variation 1 game 0W 1D 0L
Harrwitz Attack 1 game 0W 1D 0L
Fianchetto Defense 1 game 0W 1D 0L
(unspecified) 1 game 0W 1D 0L
(unspecified) 1 game 0W 1D 0L
King's Indian Attack 4 games 1W 2D 1L
(unspecified) 3 games 1W 1D 1L
(unspecified) 3 games 1W 1D 1L
Spassky Variation 1 game 0W 1D 0L
(unspecified) 1 game 0W 1D 0L
Zukertort Opening 3 games 1W 2D 0L
Quiet System 1 game 0W 1D 0L
(unspecified) 1 game 0W 1D 0L
Queen's Gambit Invitation 1 game 0W 1D 0L
(unspecified) 1 game 0W 1D 0L
Nimzo-Larsen Variation 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
Old Indian Defense 2 games 0W 1D 1L
Normal Variation 2 games 0W 1D 1L
(unspecified) 2 games 0W 1D 1L
Queen's Pawn Game 2 games 2W 0D 0L
London System 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
Symmetrical Variation 1 game 1W 0D 0L
Pseudo-Catalan 1 game 1W 0D 0L
Rat Defense 1 game 1W 0D 0L
English Rat 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
Lion Defense 1 game 1W 0D 0L
Lion's Jaw 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
Réti Opening 1 game 1W 0D 0L
Anglo-Slav Variation 1 game 1W 0D 0L
New York System 1 game 1W 0D 0L
Four Knights Game 1 game 0W 1D 0L
Scotch Variation Accepted 1 game 0W 1D 0L
Main Line 1 game 0W 1D 0L
Blunders Top 4 of 692

This player's costliest moves in analyzed games. Can you find the winning move?

2026.04.25 · 33. Rd6 (−60.8% win chance) 1/2-1/2
Levin, Felix
Koellner, Ruben Gideon
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2026.04.05 · 24. Qc4 (−48.5% win chance) 1/2-1/2
Willems, Niels
Koellner, Ruben Gideon
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2024.02.12 · 84. Rh5 (−47.5% win chance) 1/2-1/2
Hartmann, Martin
Koellner, Ruben Gideon
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2024.02.12 · 90. Rc5 (−47% win chance) 1/2-1/2
Hartmann, Martin
Koellner, Ruben Gideon
View game
View blunders & mistakes
Games Showing all 252 games
Date Event Round Color Opponent Result Accuracy % First moves