KNSB FIDE
JK

Jan Willem Koelmans

Rated since March 2026

1863 Classic
1821 Rapid

RIVALRY

Not enough games to determine rivalries yet.

The good & the bad

Best wins
NIES, L.W. (LEVI) 2028
12698 Chessfestival Groningen Open B · Monday 22 December 2025
HEIKAMP, H. (HENDRIK) 2011
12698 Chessfestival Groningen Open B · Sunday 21 December 2025
ABANES, M. (MENANDRO) 1854
13422 DD Den Haag Open Schaakkampioenschap 2026 Rondes 3-7 · Thursday 5 March 2026
ELLIYASA, M. (MEHMET) 1854
13033 17e Kattenburger Open Toernooi 17e Kattenburger Open Ronde 4 · Sunday 15 February 2026
POLAND, J.J.A. (JAN) 1798
10470 Tata Steel Chess Tournament 2026 Tienkampen · Saturday 31 January 2026
Worst losses
PUTTEN VAN, G. (GUUS) 1728
12984 33e Open Haags rapidkampioenschap Groep A · Saturday 4 April 2026
POL VAN DE, H.M. (HANS) 1732
12450 Kennemer Open 2025-2026 Kennemer Open 2025-2026 Ronde 3 en 4 · Saturday 22 November 2025
KLEIN, L.J. (LEEN) 1742
10470 Tata Steel Chess Tournament 2026 Tienkampen · Wednesday 28 January 2026
SCHWENKE, STEFAN 1850
12698 Chessfestival Groningen Open B · Sunday 28 December 2025
DIJKSTRA, E. (EDWIN) 1854
12698 Chessfestival Groningen Open B · Monday 29 December 2025
85e Daniel Noteboomtoernooi 4 kampen Friday 20 February 2026 +1–0=2 +10.9
DD Den Haag Open Schaakkampioenschap 2026 Rondes 3-7 Thursday 12 February 2026 +2–1=1 +8.6
DD Den Haag Open Schaakkampioenschap 2026 Rondes 1-2 Thursday 12 February 2026 +0–1=0 -3.8
Tata Steel Chess Tournament 2026 Tienkampen Friday 16 January 2026 +2–1=6 +12.0
2026 Chess.com Botwinnik Open Vierkampen Friday 2 January 2026 +1–0=2 +15.1
Chessfestival Groningen Open B Sunday 21 December 2025 +2–5=1 +6.3
33e Open Haags rapidkampioenschap Groep A Saturday 4 April 2026 +2–3=1 -13.9
13e Best of the West Groep A, ronde 5 Saturday 18 October 2025 +0–0=1 +3.1
13e Best of the West Groep A, ronde 4 Saturday 18 October 2025 +0–0=1 +3.8
13e Best of the West Groep A, ronde 2 Saturday 18 October 2025 +0–0=1 +5.8
17e Kattenburger Open Toernooi 17e Kattenburger Open Ronde 5 Sunday 12 October 2025 +0–0=1 +5.3
17e Kattenburger Open Toernooi 17e Kattenburger Open Ronde 4 Sunday 12 October 2025 +1–0=0 +14.7
17e Kattenburger Open Toernooi Ronde 3 Sunday 12 October 2025 +0–0=1 +1.5
Kennemer Open 2025-2026 Kennemer Open 2025-2026 Ronde 8 en 9 Saturday 20 September 2025 +1–0=1 +17.0
Kennemer Open 2025-2026 Kennemer Open 2025-2026 Ronde 7 Saturday 20 September 2025 +1–0=0 +9.6
Kennemer Open 2025-2026 Kennemer Open 2025-2026 Ronde 6 Saturday 20 September 2025 +1–0=0 +8.4
Kennemer Open 2025-2026 Kennemer Open 2025-2026 Ronde 5 Saturday 20 September 2025 +0–0=1 +3.8
Kennemer Open 2025-2026 Kennemer Open 2025-2026 Ronde 3 en 4 Saturday 20 September 2025 +0–2=0 -20.3
HSB competitie 2025-2026 April2026 Monday 1 September 2025 +0–1=0 -12.5
HSB competitie 2025-2026 CompMrt2026 Monday 1 September 2025 +0–0=1 -3.1
HSB competitie 2025-2026 HSBCompetitieFeb26 Monday 1 September 2025 +0–0=1 -3.0
HSB competitie 2025-2026 DecemberJanuari Comp 2526 Monday 1 September 2025 +0–0=1 +0.5
16e Kattenburger Open Toernooi Groep A Monday 1 September 2025 +0–0=1 +6.2

Rating History

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Peak Ratings

Classic 1855 April 1, 2026
Rapid 1835 March 1, 2026
Blitz 1855 May 1, 2026

Games

Wins 14
Losses 14
Draws 24
Win Rate 27%

Performance by Color

Color Wins Draws Losses Win Rate
White 6 12 8 23%
Black 8 12 6 31%

Recent Matches

Brugman, R.J.P. (Roman) (1856) Wednesday 22 April 2026 LOSS -12.5
Burg van den, R. (Ralf) (1946) Saturday 18 April 2026 DRAW +3.1
Kat, R. (Rudolf) (2030) Saturday 11 April 2026 DRAW +5.8
Putten van, G. (Guus) (1728) Saturday 4 April 2026 LOSS -16.2
Kumar, D. (Dhruv) (1936) Saturday 4 April 2026 LOSS -9.1
Groenewegen, M. (Max) (1474) Saturday 4 April 2026 WIN +2.6
IM Lopez, J.J. (Jasel Justo) (2375) Saturday 4 April 2026 LOSS -0.7
Termeulen, A. (Albert) (2072) Saturday 4 April 2026 DRAW +7.4
Chi, J. (Jayden) (1439) Saturday 4 April 2026 WIN +2.1
Ippel, C.J. (Cok) (1794) Saturday 28 March 2026 WIN +11.2
Ngangbam, C. (Chingthang) (1940) Thursday 26 March 2026 LOSS -8.8
Woestijne van de, A.S. (Aldo) (1989) Sunday 22 March 2026 DRAW +5.3
Weijde van der, A. (André) (1741) Monday 16 March 2026 DRAW -3.1
Bolderman, J. (Joppe) (1944) Saturday 14 March 2026 DRAW +3.8
Weerd de, J.E. (Just) (1953) Thursday 12 March 2026 DRAW +4.1
Elisen, P. (Peter) (1748) Saturday 7 March 2026 WIN +9.6
Abanes, M. (Menandro) (1854) Thursday 5 March 2026 WIN +13.3
Woudstra, L. (Louis) Thursday 26 February 2026 WIN
Belt van den, P.G.H. (Peter) (1773) Sunday 22 February 2026 DRAW -0.7
Lipka, J.F.H. (Jo) (1780) Saturday 21 February 2026 WIN +12.1