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O`sullivan, Oisin

🇮🇪

FIDEFIDE 2518082· Male· Ireland· Born in 2000

Follow Oisin O`sullivanTrack his monthly FIDE ratings, games, tournaments and more.

Oisin O`Sullivan, a 26-year-old Irish player, is rated 1720 — his current career high. He is on a steady climb with +25 Elo over the past 12 months. 20 rated games in the past year (≈12/year long-term). Recent standard appearances include Monthly 4th Sunday Quad B, Munster Chess Union Club League Division 2 Round 7, and Munster Chess Union Club League Division 2 Rounds 3-4. Also played 5 rapid (including Munster Chess Union Rapid League 2025-2026) and 3 blitz events (including Cork Chess Club Christmas Blitz - Invitational) recently.

Current rating

1720

Standard

Rpd1780·Blz1788

All-time high

1720

at best
Jun 2026 · age 26

Activity

15

games / yr avg. · ≈1/mo

16 past 12 mo · ≈1/mo
classical only
Moderately active

Signature stat

#102,783

#102,783 · players worldwide · of 218,279

Career timeline

7 entries
2026
All-time peak 1720
at age 26
Jun 2026
2024
Best 12-month gain (+317 Elo)
1365 → 1682
Dec 2024
K-factor lowered to 20
at age 24
Dec 2024
Crossed 1600
at age 24
Mar 2024
Crossed 1500
at age 24
Mar 2024
Crossed 1400
at age 24
Mar 2024

Standard rating history

Peak
FIDE title
Threshold
First rated
FIDE recal.

Activity & highlights

Top opponent
vs Cody Coughlan 1,847
Munster Chess Union Club League Division 2 Rounds 3-4 · Jan 2026 · +13.9 Elo
Evolution
+25
1695 → 1720
Tournaments
6
25 games
Score
10.5/ 2542.0%
12W3D10L
Top 3 losses
1.[L]vsGeorge White1,693·Kinsale Winter Open·R3·-10.3
2.[L]vsLen Hackett1,768·Kinsale Winter Open·R2·-8.2
3.[L]vsRoss Du Berry1,917·Munster Chess Union Club League Division 2 Rounds 3-4·R4·-4.6

Last 12 months — tournaments

6 events
EventDateScoreRankPerfΔ Elo
Monthly 4th Sunday Quad B
Round-Robin
May 20262/3#21886+15.0
Munster Chess Union Club League Division 2 Round 7
Team
Apr 20260.5/1#191705+0.4
Munster Chess Union Club League Division 2 Rounds 3-4
Team
Jan 20261/2#141882+9.2
Kinsale Winter Open
Open Swiss
Jan 20262/3#341788-13.2
Limerick Open 2025
Open Swiss
Nov 20253/3#47—+7.4
Cork Congress 2025 - Majors
Open Swiss
Oct 20252/4#21—+7.0
Hot streak: 3 tournaments without losing Elo.

Rankings

/
Ireland
#516
out of 1,228 players
Europe
#72,715
in continent
World
#102,781
out of 400,000+

National ranking

Europe & World

Europe
World
Ireland
1
🇮🇪Collins, Sam E.Follow Sam E. CollinsTrack their monthly FIDE ratings, games, tournaments and more.
2,462
2
🇮🇪Kanyamarala, TarunFollow Tarun KanyamaralaTrack their monthly FIDE ratings, games, tournaments and more.
2,426
3
🇮🇪O`Gorman, TomFollow Tom O`GormanTrack their monthly FIDE ratings, games, tournaments and more.
2,385
4
🇮🇪Jessel, StephenFollow Stephen JesselTrack their monthly FIDE ratings, games, tournaments and more.
2,357
5
🇮🇪Quinn, MarkFollow Mark QuinnTrack their monthly FIDE ratings, games, tournaments and more.
2,354
6
🇮🇪Baburin, AlexanderFollow Alexander BaburinTrack their monthly FIDE ratings, games, tournaments and more.
2,344
7
🇮🇪Collins, AdamFollow Adam CollinsTrack their monthly FIDE ratings, games, tournaments and more.
2,338
8
🇮🇪Fitzsimons, DavidFollow David FitzsimonsTrack their monthly FIDE ratings, games, tournaments and more.
2,307
9
🇮🇪Tureshbayev, AnuarFollow Anuar TureshbayevTrack their monthly FIDE ratings, games, tournaments and more.
2,304
10
🇮🇪Venkatesan, KavinFollow Kavin VenkatesanTrack their monthly FIDE ratings, games, tournaments and more.
2,297
...
516🇮🇪O`sullivan, Oisin1,720
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
...
72715🇮🇪O`sullivan, Oisin1,720
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
...
102781🇮🇪O`sullivan, Oisin1,720