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Fossum, Oystein Boyum

Standard: 2310 Rapid: 2199 Blitz: 2239 (last updated 2026-10-02)
FIDE ID: 1503430 (view FIDE profile)
Federation: NOR Sex: M Birth Year: 1987 Age: 39
Title: FM Women's title: — Other title: — FOA title: —
Games: 14 Wins: 4 (29%) Draws: 7 (50%) Losses: 2 (14%) Other: 1
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Dossier

11 of 14 games analyzed.

Accuracy: 94%
Opened Nf3: 4/5Opened c4: 1/5
Castled kingside: 9Same-side castling: 6Opposite-side castling: 2
Fianchettoed kingside: 7Fianchettoed queenside: 5Played on the kingside: 3Played on the queenside: 3Played in the center: 2
Active pieces: 7Initiated exchanges: 7Kept the bishop pair: 6Backward pawn: 6Space advantage: 6Sacrificed material: 4Isolated pawn: 4Missed tactics: 1
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Openings

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As White 6 games 2W 3D 1L
English Opening 3 games 1W 2D 0L
Great Snake Variation 1 game 0W 1D 0L
(unspecified) 1 game 0W 1D 0L
Neo-Catalan 1 game 0W 1D 0L
(unspecified) 1 game 0W 1D 0L
Symmetrical Variation 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
Zukertort Opening 2 games 1W 0D 1L
Pirc Invitation 1 game 1W 0D 0L
(unspecified) 1 game 1W 0D 0L
Sicilian Invitation 1 game 0W 0D 1L
(unspecified) 1 game 0W 0D 1L
Nimzo-Larsen Attack 1 game 0W 1D 0L
Classical Variation 1 game 0W 1D 0L
(unspecified) 1 game 0W 1D 0L
As Black 6 games 1W 3D 1L
English Opening 2 games 1W 1D 0L
Symmetrical Variation 1 game 0W 1D 0L
(unspecified) 1 game 0W 1D 0L
King's English Variation 1 game 1W 0D 0L
Reversed Closed Sicilian 1 game 1W 0D 0L
Dutch Defense 1 game 0W 1D 0L
Classical Variation 1 game 0W 1D 0L
(unspecified) 1 game 0W 1D 0L
Queen's Gambit Declined 1 game 0W 0D 0L
Tarrasch Defense 1 game 0W 0D 0L
Pseudo-Tarrasch 1 game 0W 0D 0L
Sicilian Defense 1 game 0W 0D 1L
Hyperaccelerated Dragon 1 game 0W 0D 1L
(unspecified) 1 game 0W 0D 1L
French Defense 1 game 0W 1D 0L
Schlechter Variation 1 game 0W 1D 0L
(unspecified) 1 game 0W 1D 0L
Blunders Top 4 of 24

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

2025.11.01 · 13... gxh5 (−34.5% win chance) 1-0
Fossum, Oystein Boyum
Fossheim, Yngve
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2026.03.07 · 24... Nd5 (−15.7% win chance) 1/2-1/2
Fossum, Oystein Boyum
Gausel, Einar J
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2025.11.01 · 24... Qd6 (−15.1% win chance) 1-0
Fossum, Oystein Boyum
Fossheim, Yngve
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2025.02.09 · 34... a4 (−14.3% win chance) 0-1
Fossum, Oystein Boyum
Mellem, Nicolas Axel
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Games Showing all 14 games
Date Event Round Color Opponent Result Accuracy % First moves