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Fossum, Oystein Boyum

FM🇳🇴

FIDEFIDE 1503430· Male· Norway· Born in 1987

Follow Oystein Boyum FossumTrack his monthly FIDE ratings, games, tournaments and more.

Oystein Boyum Fossum, a 39-year-old Norwegian FIDE Master, is rated 2318 — just 11 short of his peak of 2329 (Apr 2025, age 38) and ranked 48th among Norwegian players, and in the top 2% worldwide. He plays occasionally (4 games in the last 12 months) and had 4 career breaks: 14 months (2007–2008), 36 months (2009–2012), 20 months (2012–2014) and 13 months (2021–2023). Recent appearance: Elitserien 2025-2026 R 7-9. He reached Norwegian #40 in Oct 2023.

Awarded FM in 2020 (age 33). At junior level, he reached #3, #2 and #3 nationally in U20, U18 and U16.

Current rating

2318

Standard

Rpd2199·Blz2239

All-time high

2329

−11 pts below
Apr 2025 · age 38

Activity

4

games / yr avg.

4 past 12 mo
classical only
Occasional

Signature stat

#48

#48 · Norwegian players · of 2,077

Career timeline

21 entries
2025
All-time peak 2329
at age 38 · −11 from today
Apr 2025
2023
Peak Norwegian rank: #40
at age 36 · rated 2313
Oct 2023
Re-crossed 2300
at age 36
Feb 2023
2021
Inactive for 13 months
paused at 2299 → returned at 2308
Dec 2021
2020
FM title awardedFM
at age 33
May 2020
Crossed 2300
at age 33
Apr 2020

Standard rating history

Peak
FIDE title
Threshold
First rated
Inactive period
COVID-19

Activity & highlights

Top opponent
vs Einar J GauselGM 2,452
Elitserien 2025-2026 R 7-9 · Mar 2026 · +3.7 Elo
Evolution
-11
2329 → 2318
Tournaments
3
11 games
Score
1.5/ 1113.6%
4W5D2L
Top 3 wins
1.[W]vsAsmund HammerstadCM2,189·Elitserien 2025-2026 R 7-9·R8·+6.4
2.[D]vsEinar J GauselGM2,452·Elitserien 2025-2026 R 7-9·R7·+3.7
3.[D]vsHao(ZJ) WangIM2,441·Norway Chess Open 2026 June·R6·+3.4
Top 2 losses
1.[L]vsYngve Fossheim2,182·Elitserien 2025-2026 R 1-3·R2·-13.7
2.[L]vsMads Vestby-EllingsenIM2,374·Elitserien 2025-2026 R 4-6·R5·-8.1

Last 12 months — tournaments

3 events
EventDateScoreRankPerfΔ Elo
Elitserien 2025-2026 R 7-9
Team
Mar 20261.5/2#282512+10.6
Elitserien 2025-2026 R 4-6
Team
Feb 20260/1#691574-8.0
Elitserien 2025-2026 R 1-3
Team
Oct 20250/1#661382-14.0

Most-Played Opponents

vsSimen AgdesteinGM
🇳🇴NOR·2525
+0 −6 =0
6 games·last met Jan 2020
View head-to-head →
vsSebastian MihajlovIM
🇨🇷CRC·2372
+2 −3 =1
6 games·last met Jun 2019
View head-to-head →
vsEmil Doving Agdestein
🇳🇴NOR·2134
+6 −0 =0
6 games·last met Nov 2015
View head-to-head →
vsEivind Olav RistingFM
🇳🇴NOR·2256
+2 −1 =2
5 games·last met Nov 2019
View head-to-head →

Rankings

/
Norway
#48
out of 2,669 players
Europe
#2,326
in continent
World
#3,526
out of 400,000+

National ranking

Europe & World

Europe
World
Norway
1
🇳🇴Carlsen, MagnusFollow Magnus CarlsenTrack their monthly FIDE ratings, games, tournaments and more.
2,841
2
🇳🇴Christiansen, Johan-SebastianFollow Johan-Sebastian ChristiansenTrack their monthly FIDE ratings, games, tournaments and more.
2,647
3
🇳🇴Tari, AryanFollow Aryan TariTrack their monthly FIDE ratings, games, tournaments and more.
2,641
4
🇳🇴Amar, ElhamFollow Elham AmarTrack their monthly FIDE ratings, games, tournaments and more.
2,584
5
🇳🇴Hammer, Jon LudvigFollow Jon Ludvig HammerTrack their monthly FIDE ratings, games, tournaments and more.
2,574
6
🇳🇴Urkedal, Frode Olav OlsenFollow Frode Olav Olsen UrkedalTrack their monthly FIDE ratings, games, tournaments and more.
2,566
7
🇳🇴Agdestein, SimenFollow Simen AgdesteinTrack their monthly FIDE ratings, games, tournaments and more.
2,525
8
🇳🇴Holm, Kristian StuvikFollow Kristian Stuvik HolmTrack their monthly FIDE ratings, games, tournaments and more.
2,497
9
🇳🇴Hall, JesperFollow Jesper HallTrack their monthly FIDE ratings, games, tournaments and more.
2,494
10
🇳🇴Ostmoe, Geir Sune TallaksenFollow Geir Sune Tallaksen OstmoeTrack their monthly FIDE ratings, games, tournaments and more.
2,488
...
48🇳🇴Fossum, Oystein Boyum2,318
Europe
1
🇳🇴Carlsen, MagnusFollow Magnus CarlsenTrack their monthly FIDE ratings, games, tournaments and more.
2,841
2
🇩🇪Keymer, VincentFollow Vincent KeymerTrack their monthly FIDE ratings, games, tournaments and more.
2,767
3
🇳🇱Giri, AnishFollow Anish GiriTrack their monthly FIDE ratings, games, tournaments and more.
2,764
4
🇫🇷Firouzja, AlirezaFollow Alireza FirouzjaTrack their monthly FIDE ratings, games, tournaments and more.
2,744
5
🇵🇱Duda, Jan-KrzysztofFollow Jan-Krzysztof DudaTrack their monthly FIDE ratings, games, tournaments and more.
2,739
6
🇭🇺Rapport, RichardFollow Richard RapportTrack their monthly FIDE ratings, games, tournaments and more.
2,729
7
🇳🇱Van Foreest, JordenFollow Jorden Van ForeestTrack their monthly FIDE ratings, games, tournaments and more.
2,728
8
🇫🇷Vachier-Lagrave, MaximeFollow Maxime Vachier-LagraveTrack their monthly FIDE ratings, games, tournaments and more.
2,721
9
🇦🇿Mamedyarov, ShakhriyarFollow Shakhriyar MamedyarovTrack their monthly FIDE ratings, games, tournaments and more.
2,717
10
🇹🇷Erdogmus, Yagiz KaanFollow Yagiz Kaan ErdogmusTrack their monthly FIDE ratings, games, tournaments and more.
2,713
...
2326🇳🇴Fossum, Oystein Boyum2,318
World
1
🇳🇴Carlsen, MagnusFollow Magnus CarlsenTrack their monthly FIDE ratings, games, tournaments and more.
2,841
2
🇺🇸Nakamura, HikaruFollow Hikaru NakamuraTrack their monthly FIDE ratings, games, tournaments and more.
2,792
2
🇺🇸Caruana, FabianoFollow Fabiano CaruanaTrack their monthly FIDE ratings, games, tournaments and more.
2,792
4
🇺🇿Abdusattorov, NodirbekFollow Nodirbek AbdusattorovTrack their monthly FIDE ratings, games, tournaments and more.
2,777
4
🇺🇿Sindarov, JavokhirFollow Javokhir SindarovTrack their monthly FIDE ratings, games, tournaments and more.
2,777
6
🇩🇪Keymer, VincentFollow Vincent KeymerTrack their monthly FIDE ratings, games, tournaments and more.
2,767
7
🇳🇱Giri, AnishFollow Anish GiriTrack their monthly FIDE ratings, games, tournaments and more.
2,764
8
🇮🇳Erigaisi ArjunFollow Erigaisi ArjunTrack their monthly FIDE ratings, games, tournaments and more.
2,761
9
🇺🇸So, WesleyFollow Wesley SoTrack their monthly FIDE ratings, games, tournaments and more.
2,753
9
🇨🇳Wei, YiFollow Yi WeiTrack their monthly FIDE ratings, games, tournaments and more.
2,753
...
3526🇳🇴Fossum, Oystein Boyum2,318