KNSB FIDE
JK

Jeffrey Klaassen

Rated since March 2026

1767 Classic
1855 Rapid
1855 Blitz

RIVALRY

Not enough games to determine rivalries yet.

The good & the bad

Best wins
ERMES, M. (MARC) 1727
12598 S.V. De Baronie interne competitie 02-02-2026 t/m 23-02-2026 (170007) · Monday 9 February 2026
DIELISSEN, G.J.M. (GERJOS) 1665
12598 S.V. De Baronie interne competitie 02-02-2026 t/m 23-02-2026 (170007) · Monday 2 February 2026
BONDAR, K.P.V. (KONSTANTIN) 1598
12599 S.V. De Baronie interne competitie 02-03-2026 t/m 23-03-2026 (170007) · Monday 9 March 2026
GARDEIJN DE, J.W. (JAN) 1584
12602 S.V. De Baronie interne competitie 01-06-2026 t/m 01-06-2026 (170007) · Monday 1 June 2026
Worst losses
ERMES, M. (MARC) 1758
12601 S.V. De Baronie interne competitie 11-05-2026 t/m 18-05-2026 (170007) · Monday 18 May 2026
BOEREN, P. (PAUL) 1776
12599 S.V. De Baronie interne competitie 02-03-2026 t/m 23-03-2026 (170007) · Monday 16 March 2026
OOMS, C. (KEES) 1877
14405 S.V. De Baronie interne competitie 09-09-2026 t/m 19-05-2027 Groep A · Monday 28 September 2026
No FIDE-rated tournaments found.
S.V. De Baronie interne competitie 09-09-2026 t/m 19-05-2027 Groep A Monday 14 September 2026 +0–1=1 -28.7
S.V. De Baronie interne competitie 01-06-2026 t/m 01-06-2026 (170007) Monday 8 September 2025 +1–0=0 +19.1
S.V. De Baronie interne competitie 11-05-2026 t/m 18-05-2026 (170007) Monday 8 September 2025 +0–1=1 -57.3
S.V. De Baronie interne competitie 30-03-2026 t/m 20-04-2026 (170007) Monday 8 September 2025 +0–1=1 -20.6
S.V. De Baronie interne competitie 02-03-2026 t/m 23-03-2026 (170007) Monday 8 September 2025 +1–1=0
S.V. De Baronie interne competitie 02-02-2026 t/m 23-02-2026 (170007) Monday 8 September 2025 +2–0=1

Rating History

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Peak Ratings

Classic 1989 March 1, 2026
Rapid 1855 April 1, 2026
Blitz 1855 April 1, 2026

Games

Wins 4
Losses 4
Draws 4
Win Rate 33%

Performance by Color

Color Wins Draws Losses Win Rate
White 3 2 2 43%
Black 1 2 2 20%

Recent Matches

Ooms, C. (Kees) (1877) Monday 28 September 2026 LOSS -28.0
Stafleu, M. (Michiel) (1789) Monday 21 September 2026 DRAW -0.7
Gardeijn de, J.W. (Jan) (1584) Monday 1 June 2026 WIN +19.1
Ermes, M. (Marc) (1758) Monday 18 May 2026 LOSS -53.3
Severeijnen, P.M.M. (Peter) (1802) Monday 11 May 2026 DRAW -3.9
Leeuw de, C.A. (Kees) (1694) Monday 13 April 2026 DRAW -20.6
Tabatabaei, K. Monday 30 March 2026 LOSS
Boeren, P. (Paul) (1776) Monday 16 March 2026 LOSS
Bondar, K.P.V. (Konstantin) (1598) Monday 9 March 2026 WIN
Ligtenberg, B. (Bas) (1739) Monday 23 February 2026 DRAW
Ermes, M. (Marc) (1727) Monday 9 February 2026 WIN
Dielissen, G.J.M. (Gerjos) (1665) Monday 2 February 2026 WIN