KNSB FIDE
JK

Jan Willem Koelmans

Rated since October 2003

1800 Classical
1822 Rapid
1894 Blitz

The good & the bad

Best wins
NIES, LEVI 1939
Chessfestival Groningen 2025 Open B · 2025-12-21
HEIKAMP, HENDRIK 1925
Chessfestival Groningen 2025 Open B · 2025-12-21
POLAND, JAN 1828
Tata Steel Chess 2026 - Tienkampen · 2026-01-23
FRANX, JAN PAUL 1766
Tata Steel Chess 2026 - Tienkampen · 2026-01-23
EVELEENS, ED 1727
2026 Chess.com Botwinnik Open - Vierkampen · 2026-01-02
Worst losses
KLEIN, LEEN 1769
Tata Steel Chess 2026 - Tienkampen · 2026-01-23
SCHWENKE, STEFAN 1850
Chessfestival Groningen 2025 Open B · 2025-12-21
DIJKSTRA, EDWIN 1877
Chessfestival Groningen 2025 Open B · 2025-12-21
SCHOFFELMEER, JETSE 1881
Chessfestival Groningen 2025 Open B · 2025-12-21
NGANGBAM, CHINGTHANG 1913
DD Den Haag Open Kampioenschap 2026 · 2026-02-12

FIDE Tournaments

DD Den Haag Open Kampioenschap 2026 2026-02-12 +1–2=0 -2.2
Tata Steel Chess 2026 - Tienkampen 2026-01-23 +2–1=6 +11.4
85e Noteboomtoernooi - Vierkampen 2026-02-20 +0–0=2 +1.4
Chessfestival Groningen 2025 Open B 2025-12-21 +2–5=1 -3.8
2026 Chess.com Botwinnik Open - Vierkampen 2026-01-02 +1–0=1 +9.6
HSG Open 2026 Groep B Friday 19 June 2026 +0–2=3 -20.7
18de BPB Limburg Open 2026 Groep C Friday 22 May 2026 +2–0=5 -5.9
51e Open Kampioenschap van Utrecht Groep C Friday 15 May 2026 +1–0=3 +0.8
DD Rapid Open Groep A Saturday 2 May 2026 +3–2=2 -1.6
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

Rating History

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Peak Ratings

Classical 2050
Rapid 1832
Blitz 1966

Games

Wins 6
Losses 8
Draws 10
Win Rate 25%

Performance by Color

Color Wins Draws Losses Win Rate
White 2 5 6 15%
Black 4 5 2 36%

All-time Games (from rating history)

Classical 484
Rapid 5
Blitz 20

Recent Matches

Eerens, Pim (2096) 2026-02-12 LOSS -2.8
Abanes, Menandro (1684) 2026-02-12 WIN +7.2
Ngangbam, Chingthang (1913) 2026-02-12 LOSS -6.6
De Goeij, Jean (1726) 2026-01-23 DRAW -1.6
Coolen, Marlo (1806) 2026-01-23 DRAW +0.6
Franx, Jan Paul (1766) 2026-01-23 WIN +9.6
Ruiter, Peter (1837) 2026-01-23 DRAW +1.6
Oudejans, Martin (1735) 2026-01-23 DRAW -1.4
Klein, Leen (1769) 2026-01-23 LOSS -10.4
Wheat, Bob (1792) 2026-01-23 DRAW +0.2
Poland, Jan (1828) 2026-01-23 WIN +11.2
Swart, Dirk-Willem (1839) 2026-01-23 DRAW +1.6
Plug, Arjan (1816) 2026-02-20 DRAW +0.8
Belt, Peter Van Den (1808) 2026-02-20 DRAW +0.6
Heikamp, Hendrik (1925) 2025-12-21 WIN +13.8
Nies, Levi (1939) 2025-12-21 WIN +14.2
Zecha, Oscar (1982) 2025-12-21 LOSS -4.8
Jelic, Bruno (1975) 2025-12-21 LOSS -5.0
Schoffelmeer, Jetse (1881) 2025-12-21 LOSS -7.4
Schwenke, Stefan (1850) 2025-12-21 LOSS -8.2
Dijkstra, Edwin (1877) 2025-12-21 LOSS -7.4
Nair, Pranav Prasobh (1822) 2025-12-21 DRAW +1.0
Beltman, Joost (1829) 2026-01-02 DRAW +1.2
Eveleens, Ed (1727) 2026-01-02 WIN +8.4