KNSB FIDE
HK

Hieronymus Koelhuis

Rated since December 2025

1231 Classic
1272 Rapid

RIVALRY

Nemesis
Nieuwenhuijse, C.P. (Dieter)
Games: 4 · Win rate: 25%

The good & the bad

Best wins
WAGENMAKERS, A. (AMIR) 1435
12461 46e Landau jeugdschaaktoernooi Groep A · Saturday 3 January 2026
KOK DE, T.J.C. (THIJS) 1369
11999 Pepernoten Toernooi (GrandPrix) ABC-groep · Saturday 29 November 2025
DIJKHUIJSEN, P.J. (PITER) 1311
14172 ONJK 2026 ONJK 2026 ABC · Saturday 1 August 2026
PROVOOST, B. (BENJAMIN) 1297
11999 Pepernoten Toernooi (GrandPrix) ABC-groep · Saturday 29 November 2025
RAAIJMAKERS, K.R.J. (KYANO) 1282
13751 Grand prix Kruiningen Groep ABC · Saturday 9 May 2026
Worst losses
NIEUWENHUIJSE, C.P. (DIETER) 998
12461 46e Landau jeugdschaaktoernooi Groep A · Saturday 3 January 2026
VLIEGHER DE, L. (LARS) 1148
12461 46e Landau jeugdschaaktoernooi Groep A · Saturday 3 January 2026
LAK, S. (SIETSE) 1206
13751 Grand prix Kruiningen Groep ABC · Saturday 9 May 2026
FEIJ, E. (ELMO) 1292
13751 Grand prix Kruiningen Groep ABC · Saturday 9 May 2026
JERMIN, A. (AYLEANNA) 1435
14172 ONJK 2026 ONJK 2026 ABC · Tuesday 4 August 2026
Grand prix Kruiningen Groep ABC Saturday 9 May 2026 +2–4=1 -57.7
ONJK 2026 ONJK 2026 ABC Thursday 30 July 2026 +1–5=2
PKJ Zeeland speeldag 2 PKJ ZSB 2026 AB-groep Saturday 31 January 2026 +1–3=0
46e Landau jeugdschaaktoernooi Groep A Saturday 3 January 2026 +2–4=0 -108.4
Pepernoten Toernooi (GrandPrix) ABC-groep Saturday 29 November 2025 +3–4=0

Rating History

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Peak Ratings

Classic 1349 March 1, 2026
Rapid 1398 Jan. 1, 2026

Games

Wins 9
Losses 20
Draws 3
Win Rate 28%

Performance by Color

Color Wins Draws Losses Win Rate
White 8 1 7 50%
Black 1 2 13 6%

Recent Matches

Jermin, A. (Ayleanna) (1435) Tuesday 4 August 2026 LOSS
Swaluw van der, J. (Jynx) Tuesday 4 August 2026 DRAW
Oruc, S. (Siraz) (1646) Monday 3 August 2026 LOSS
Veldhuis, J. (Jasper) (1718) Saturday 1 August 2026 LOSS
Dijkhuijsen, P.J. (Piter) (1311) Saturday 1 August 2026 WIN
Bos, Y.Y. (Yaro) (1576) Friday 31 July 2026 LOSS
Trommel, R. (Rick) Friday 31 July 2026 LOSS
Heukelom, A. (Aurelia) Thursday 30 July 2026 DRAW
Feij, E. (Elmo) (1292) Saturday 9 May 2026 LOSS -31.5
Goudzwaard, M.I. (Matthias) (1466) Saturday 9 May 2026 DRAW +12.4
Lak, S. (Sietse) (1206) Saturday 9 May 2026 LOSS -38.5
Vliegher de, L. (Lars) (1197) Saturday 9 May 2026 WIN +20.7
Zootjes, A. (Aäron) (1905) Saturday 9 May 2026 LOSS -1.1
Raaijmakers, K.R.J. (Kyano) (1282) Saturday 9 May 2026 WIN +27.6
Nieuwenhuijse, C.P. (Dieter) (1077) Saturday 9 May 2026 LOSS -47.5
Mustafov, B. (Berk) (1639) Saturday 31 January 2026 LOSS
Koolhoven, G. (Giovanni) (1613) Saturday 31 January 2026 LOSS
Nieuwenhuijse, C.P. (Dieter) Saturday 31 January 2026 LOSS
IJdema, J. (Jeremy) Saturday 31 January 2026 WIN
Wagenmakers, A. (Amir) (1435) Saturday 3 January 2026 WIN +45.0