KNSB FIDE
EK

Erik Klaassen

Rated since January 2023

1582 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 04-05-2026 t/m 11-05-2026 (010012) Monday 25 August 2025 +0–0=1 +3.2
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

Team Competition

Current team
Heerenveen 3
2e klasse C · 2025-2026 · 1 game

Rating History

Loading rating history...

Peak Ratings

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

Games

Wins 11
Losses 16
Draws 15
Win Rate 26%

Performance by Color

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

Recent Matches

Bokal, E. (Elmadani) (1671) Monday 4 May 2026 DRAW +3.2
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