KNSB FIDE
FO

Fionn O'Callaghan

Rated since June 2025

936 Rapid

RIVALRY

Not enough games to determine rivalries yet.

The good & the bad

Best wins
SINGHAL, A. (AANYA) 1064
11798 GP Zaanstad Groep A · Sunday 16 November 2025
BRUIN, M. (MORRIS) 992
13972 GP HWP Haarlem GP HWP Haarlem · Sunday 7 June 2026
HOORN, O. (OLAF) 963
13972 GP HWP Haarlem GP HWP Haarlem · Sunday 7 June 2026
BUTTON, L. (LUCAS) 917
13972 GP HWP Haarlem GP HWP Haarlem · Sunday 7 June 2026
JAYAWARDANA, H.M. (WANUJA) 756
11798 GP Zaanstad Groep A · Sunday 16 November 2025
Worst losses
TADJER, Z. (ZACHARIAH) 776
11798 GP Zaanstad Groep A · Sunday 16 November 2025
STERK, M.M. (MILAN) 919
13972 GP HWP Haarlem GP HWP Haarlem · Sunday 7 June 2026
STEKELENBURG VAN, G.G. (SJORS) 919
13972 GP HWP Haarlem GP HWP Haarlem · Sunday 7 June 2026
KROFT VAN DER, E. (ELLENNA) 932
13972 GP HWP Haarlem GP HWP Haarlem · Sunday 7 June 2026
KHADKA, B. (BARDAN) 935
11798 GP Zaanstad Groep A · Sunday 16 November 2025
Open NK Rapid Jeugd 2013 Sunday 4 May 2025 +0–6=1
GP HWP Haarlem GP HWP Haarlem Sunday 7 June 2026 +3–4=0 -39.5
GP Zaanstad Groep A Sunday 16 November 2025 +4–3=0 +85.5

Rating History

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Peak Ratings

Rapid 965 June 1, 2026

Games

Wins 7
Losses 13
Draws 1
Win Rate 33%

Performance by Color

Color Wins Draws Losses Win Rate
White 3 1 8 25%
Black 4 0 5 44%

Recent Matches

Hoorn, O. (Olaf) (963) Sunday 7 June 2026 WIN +28.7
Kroft van der, E. (Ellenna) (932) Sunday 7 June 2026 LOSS -31.5
Button, L. (Lucas) (917) Sunday 7 June 2026 WIN +25.0
Bakel van, T. (Tije) (981) Sunday 7 June 2026 LOSS -27.6
Bruin, M. (Morris) (992) Sunday 7 June 2026 WIN +31.0
Sterk, M.M. (Milan) (919) Sunday 7 June 2026 LOSS -32.6
Stekelenburg van, G.G. (Sjors) (919) Sunday 7 June 2026 LOSS -32.6
Sosef, A.J. (Aiden) (695) Sunday 16 November 2025 WIN +28.1
Khadka, B. (Bardan) (935) Sunday 16 November 2025 LOSS -27.0
Singhal, A. (Aanya) (1064) Sunday 16 November 2025 WIN +66.4
Raat, G.G.Y. (Guillon) (734) Sunday 16 November 2025 WIN +32.3
Jayawardana, H.M. (Wanuja) (756) Sunday 16 November 2025 WIN +34.7
Tadjer, Z. (Zachariah) (776) Sunday 16 November 2025 LOSS -44.7
Sohret, Y. (Yusuf Algan) (1276) Sunday 16 November 2025 LOSS -4.2
Madularea, E. (Eric) (1430) Sunday 4 May 2025 LOSS
Roelofsen, M.L. (Mika) (1669) Sunday 4 May 2025 LOSS
Kromodihardjo, D.J.H. (Dean) (1086) Sunday 4 May 2025 DRAW
Dusek, F. (Filip) (1084) Sunday 4 May 2025 LOSS
Bogers, L.H.M. (Lexi) (957) Sunday 4 May 2025 LOSS
Malhan, K. (Kiyaan) (1369) Sunday 4 May 2025 LOSS