JK

Johan de Koning

Rated since January 2023

1955 Classic
1926 Rapid
1907 Blitz

RIVALRY

Nemesis
Pouwelse, E.H. (Edo)
Games: 4 · Win rate: 50%
Kryptonite
Huijzer, A.J. (Arjan)
Games: 4 · Win rate: 25%
Easy Target
Huijskens, M. (Matheus)
Games: 4 · Win rate: 100%

The good & the bad

Best wins
HUIJZER, A.J. (ARJAN) 1912
14076 S.V. Nieuwerkerk a/d IJssel interne competitie 28-04-2026 t/m 28-04-… · Tuesday 28 April 2026
POUWELSE, E.H. (EDO) 1838
14078 S.V. Nieuwerkerk a/d IJssel interne competitie 03-03-2026 t/m 26-05-… · Tuesday 3 March 2026
BOESTEN, T.J.S. (TOM) 1813
14075 S.V. Nieuwerkerk a/d IJssel interne competitie 06-01-2026 t/m 30-06-… · Tuesday 14 April 2026
VALK, R.C. (ROBERT) 1761
14078 S.V. Nieuwerkerk a/d IJssel interne competitie 03-03-2026 t/m 26-05-… · Tuesday 26 May 2026
GIJSBERTSE, D.P. (DAAN) 1740
13177 RSB Competitie 2025-2026 Achttallen februari · Tuesday 24 February 2026
Worst losses
EVERAARS, J.H. (HAN) 1698
14076 S.V. Nieuwerkerk a/d IJssel interne competitie 28-04-2026 t/m 28-04-… · Tuesday 28 April 2026
VALK, R.C. (ROBERT) 1763
14076 S.V. Nieuwerkerk a/d IJssel interne competitie 28-04-2026 t/m 28-04-… · Tuesday 28 April 2026
MULDER, W.B. (WIM) 1875
14076 S.V. Nieuwerkerk a/d IJssel interne competitie 28-04-2026 t/m 28-04-… · Tuesday 28 April 2026
NUNNIKHOVEN, J.A. (HANS) 1916
13446 RSB Competitie 2025-2026 Achttallen maart · Tuesday 24 March 2026
ZIJLEMAN, R.A. (RICHARD) 1936
14076 S.V. Nieuwerkerk a/d IJssel interne competitie 28-04-2026 t/m 28-04-… · Tuesday 28 April 2026
No FIDE-rated tournaments found.
S.V. Nieuwerkerk a/d IJssel interne competitie 28-04-2026 t/m 28-04-… Tuesday 16 December 2025 +6–4=2 -55.1
S.V. Nieuwerkerk a/d IJssel interne competitie 03-03-2026 t/m 26-05-… Tuesday 25 November 2025 +7–1=0 +22.4
S.V. Nieuwerkerk a/d IJssel interne competitie 06-01-2026 t/m 30-06-… Tuesday 9 September 2025 +6–0=6 +26.8
RSB Competitie 2025-2026 Achttallen juni Monday 1 September 2025 +1–0=0 +6.2
RSB Competitie 2025-2026 Achttallen april Monday 1 September 2025 +0–0=1 -4.5
RSB Competitie 2025-2026 Achttallen maart Monday 1 September 2025 +0–1=0 -13.3
RSB Competitie 2025-2026 Achttallen februari Monday 1 September 2025 +1–0=0 +6.2

Rating History

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Peak Ratings

Classic 1955 Aug. 1, 2026
Rapid 1926 Aug. 1, 2026
Blitz 1962 Jan. 1, 2026

Games

Wins 21
Losses 6
Draws 9
Win Rate 58%

Performance by Color

Color Wins Draws Losses Win Rate
White 10 5 3 56%
Black 11 4 3 61%

Recent Matches

Pouwelse, E.H. (Edo) (1782) Tuesday 9 June 2026 DRAW -4.7
Bakker, J.S. (John) (1728) Monday 1 June 2026 WIN +6.2
Nentjes, H.N. (Henk) (1655) Tuesday 26 May 2026 WIN +4.8
Verschoor, C.G. (Cees) (1506) Tuesday 26 May 2026 WIN +2.1
Valk, R.C. (Robert) (1761) Tuesday 26 May 2026 WIN +7.7
Huijskens, M. (Matheus) (1341) Tuesday 26 May 2026 WIN +0.6
Koning de, M. (Martijn) (1397) Tuesday 19 May 2026 WIN +0.8
Huijskens, M. (Matheus) (1349) Tuesday 12 May 2026 WIN +0.6
Valk, R.C. (Robert) (1763) Tuesday 28 April 2026 LOSS -18.9
Huijzer, A.J. (Arjan) (1912) Tuesday 28 April 2026 WIN +10.8
Huijskens, M. (Matheus) (1355) Tuesday 28 April 2026 WIN +0.4
Zijleman, R.A. (Richard) (1936) Tuesday 28 April 2026 LOSS -13.4
Boesten, T.J.S. (Tom) (1793) Tuesday 28 April 2026 WIN +6.9
Jarings, J. (Hans) (1079) Tuesday 28 April 2026 WIN +0.0
Mulder, W.B. (Wim) (1875) Tuesday 28 April 2026 LOSS -15.5
Pouwelse, E.H. (Edo) (1839) Tuesday 28 April 2026 DRAW -4.2
Huijzer, A.J. (Arjan) (1912) Tuesday 28 April 2026 DRAW -1.7
Huijskens, M. (Matheus) (1355) Tuesday 28 April 2026 WIN +0.4
Koning de, M. (Martijn) (1397) Tuesday 28 April 2026 WIN +0.6
Everaars, J.H. (Han) (1698) Tuesday 28 April 2026 LOSS -20.6