KNSB FIDE
EK

Erik Klaassen

Rated since January 2023

1579 Classic
1583 Rapid
1590 Blitz

RIVALRY

Nemesis
Doetjes, P. (Peter)
Games: 3 · Win rate: 33%
Kryptonite
Smidstra, D. (Durk)
Games: 3 · Win rate: 33%
Easy Target
Rademakers, R.P. (Ronald)
Games: 3 · Win rate: 67%

The good & the bad

Best wins
VIERSMA, M. (MURK) 1867
13689 FK Snelschaak 2026 Groep A · Friday 24 April 2026
DAM VAN, F. (FRANS) 1689
12691 S.C. Heerenveen interne competitie 01-12-2025 t/m 01-12-2025 (010012) · Monday 1 December 2025
DOETJES, P. (PETER) 1674
13689 FK Snelschaak 2026 Groep A · Friday 24 April 2026
RIEPMA, Z. (ZEEGER) 1573
12691 S.C. Heerenveen interne competitie 01-12-2025 t/m 01-12-2025 (010012) · Monday 1 December 2025
VAART VAN DER, T. (TWAN) 1483
12691 S.C. Heerenveen interne competitie 01-12-2025 t/m 01-12-2025 (010012) · Monday 1 December 2025
Worst losses
BOS, J. (JERIMI) 1476
13689 FK Snelschaak 2026 Groep A · Friday 24 April 2026
RUITER DE, W. (WIETZE) 1508
12691 S.C. Heerenveen interne competitie 01-12-2025 t/m 01-12-2025 (010012) · Monday 1 December 2025
AKKERMAN, W. (WILLEM) 1640
13689 FK Snelschaak 2026 Groep A · Friday 24 April 2026
DOETJES, P. (PETER) 1667
13190 S.C. Heerenveen interne competitie 12-01-2026 t/m 23-02-2026 (010012) · Monday 16 February 2026
OPPENHUIZEN, W.G. (WIEBE) 1670
11718 S.C. Heerenveen interne competitie 03-11-2025 t/m 22-12-2025 (010012) · Monday 15 December 2025
No FIDE-rated tournaments found.
FK Snelschaak 2026 Groep A Friday 24 April 2026 +3–7=1 -17.7
S.C. Heerenveen interne competitie 01-12-2025 t/m 01-12-2025 (010012) Monday 1 December 2025 +5–5=1 +13.7
S.C. Heerenveen interne competitie 02-03-2026 t/m 20-04-2026 (010012) Monday 25 August 2025 +1–0=6 -4.0
S.C. Heerenveen interne competitie 12-01-2026 t/m 23-02-2026 (010012) Monday 25 August 2025 +1–2=3 -3.7
S.C. Heerenveen interne competitie 03-11-2025 t/m 22-12-2025 (010012) Monday 25 August 2025 +1–2=3 -12.7

Rating History

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Peak Ratings

Classic 1685 April 1, 2025
Rapid 1583 March 1, 2026
Blitz 1626 Jan. 1, 2025

Games

Wins 11
Losses 16
Draws 14
Win Rate 27%

Performance by Color

Color Wins Draws Losses Win Rate
White 10 5 6 48%
Black 1 9 10 5%

Recent Matches

Akkerman, W. (Willem) (1640) Friday 24 April 2026 LOSS -5.7
Doetjes, P. (Peter) (1674) Friday 24 April 2026 WIN +14.8
Bos, J. (Jerimi) (1476) Friday 24 April 2026 LOSS -17.0
Bozanic, L. (Leon) (1683) Friday 24 April 2026 LOSS -9.9
Cnossen, H.F. (Hinke Fiona) (1333) Friday 24 April 2026 WIN +4.2
Voerman, P. (Pascal) (1282) Friday 24 April 2026 DRAW -9.3
Meijer, D. (Daniël) (1786) Friday 24 April 2026 LOSS -3.3
Zijlstra, J. (Jasper) (1905) Friday 24 April 2026 LOSS -3.7
Dekker, J. (Jos) (1836) Friday 24 April 2026 LOSS -5.3
Kompaan, R. (Rick) (1952) Friday 24 April 2026 LOSS -2.9
Viersma, M. (Murk) (1867) Friday 24 April 2026 WIN +20.4
Kooij van der, T.P. (Pieter) (1562) Monday 20 April 2026 DRAW -0.7
Smidstra, D. (Durk) (1507) Monday 13 April 2026 DRAW -2.6
Wolfswinkel, W. (Lucas) (1200) Monday 30 March 2026 WIN +2.3
Rademakers, R.P. (Ronald) (1494) Monday 23 March 2026 DRAW -3.1
Heide van der, B. (Bas) Monday 16 March 2026 DRAW
Klinkers, R.L. (Roelof) (1708) Monday 9 March 2026 DRAW +4.2
Vaart van der, T. (Twan) (1318) Monday 2 March 2026 DRAW -4.0
Heide van der, T. (Tim) Monday 23 February 2026 LOSS
Doetjes, P. (Peter) (1667) Monday 16 February 2026 LOSS -9.7