KNSB FIDE
BK

Bas Koster

Rated since January 2023

1717 Classic
1717 Rapid
1717 Blitz

RIVALRY

Not enough games to determine rivalries yet.

The good & the bad

Best wins
DUFOORT, W. (WIM) 1650
12265 KNSB competitie 2025-2026 Klasse 5 ronde 2 · Saturday 1 November 2025
Worst losses
BRINKE TE, J.H. (HENK) 1712
12993 KNSB competitie 2025-2026 Klasse 6 ronde 6 · Saturday 7 February 2026
No FIDE-rated tournaments found.
KNSB competitie 2025-2026 Klasse 5 ronde 5 Saturday 20 September 2025 +0–0=1 -0.2
KNSB competitie 2025-2026 Klasse 5 ronde 7 Saturday 20 September 2025 +1–0=0
KNSB competitie 2025-2026 Klasse 6 ronde 6 Saturday 20 September 2025 +0–1=0 -19.8
KNSB competitie 2025-2026 Klasse 5 ronde 4 Saturday 20 September 2025 +0–0=1 -1.5
KNSB competitie 2025-2026 Klasse 5 ronde 2 Saturday 20 September 2025 +1–0=0 +15.2

Rating History

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Peak Ratings

Classic 1738 Dec. 1, 2025
Rapid 1717 March 1, 2026
Blitz 1717 March 1, 2026

Games

Wins 2
Losses 1
Draws 2
Win Rate 40%

Performance by Color

Color Wins Draws Losses Win Rate
White 1 1 1 33%
Black 1 1 0 50%

Recent Matches

Uijthof, H. (Henk) (1713) Saturday 28 March 2026 DRAW -0.2
Burkum van, S. (Samiq) Saturday 7 March 2026 WIN
Brinke te, J.H. (Henk) (1712) Saturday 7 February 2026 LOSS -19.8
Logtenberg, M. (Martin) (1710) Saturday 13 December 2025 DRAW -1.5
Dufoort, W. (Wim) (1650) Saturday 1 November 2025 WIN +15.2