KNSB FIDE
JK

Jaap de Koster

Rated since November 2024

1764 Classical

The good & the bad

Best wins
DOBBER, G. (BERT) 1867
Dutch Team Competition - klasse 5 Round 4 · 2025-12-13
Worst losses
EHRHARDT, M. (MATTHIAS) 1783
Dutch Team Competition - klasse 5 Round 7 · 2026-03-07

FIDE Tournaments

Dutch Team Competition - klasse 5 Round 7 2026-03-07 +0–1=0 -20.0
Tata Steel Chess 2026 - Weekendvierkampen 2026-01-16 +0–0=2 +4.0
Dutch Team Competition - klasse 5 Round 4 2025-12-13 +1–0=0 +26.0

Rating History

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Peak Ratings

Classical 1784

Games

Wins 1
Losses 1
Draws 2
Win Rate 25%

Performance by Color

Color Wins Draws Losses Win Rate
White 0 2 0 0%
Black 1 0 1 50%

All-time Games (from rating history)

Classical 14

Recent Matches

Ehrhardt, M. (matthias) (1783) 2026-03-07 LOSS -20.0
Sinnige, Hans (1844) 2026-01-16 DRAW +3.6
Weidema, Luuk (1789) 2026-01-16 DRAW +0.4
Dobber, G. (bert) (1867) 2025-12-13 WIN +26.0