KNSB FIDE
WK

Willem de Koster

Rated since October 2023

1760 Classical
1786 Blitz

The good & the bad

Best wins
VAN DER STELT, EZRA 1872
Tata Steel Chess 2026 - Weekendvierkampen · 2026-01-16
Worst losses
DE BOCK, GIJSBERT 1747
Tata Steel Chess 2026 - Weekendvierkampen · 2026-01-16
DE KONING, AARON 1849
Tata Steel Chess 2026 - Weekendvierkampen · 2026-01-16

FIDE Tournaments

2026 Chess.com Botwinnik Open - Vierkampen 2026-01-02 +0–0=2 +9.6
Tata Steel Chess 2026 - Weekendvierkampen 2026-01-16 +1–2=0 -10.0
2026 Chess.com Botwinnik Open Vierkampen Friday 2 January 2026 +0–0=2 +3.6

Rating History

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Peak Ratings

Classical 1760
Blitz 1786

Games

Wins 1
Losses 2
Draws 2
Win Rate 20%

Performance by Color

Color Wins Draws Losses Win Rate
White 0 0 1 0%
Black 1 2 1 25%

All-time Games (from rating history)

Classical 11
Blitz 18

Recent Matches

Rijnders, Wijnand (1863) 2026-01-02 DRAW +5.6
Van Houten, Arno (1829) 2026-01-02 DRAW +4.0
Van Der Stelt, Ezra (1872) 2026-01-16 WIN +26.0
De Bock, Gijsbert (1747) 2026-01-16 LOSS -20.8
De Koning, Aaron (1849) 2026-01-16 LOSS -15.2