KNSB FIDE
HS

Henk Seijen

Rated since January 2023

1822 Classic
1822 Rapid
1822 Blitz

RIVALRY

Nemesis
Westermann, O.A. (Tony)
Games: 3 · Win rate: 100%

The good & the bad

Best wins
DEKKER, J. (JASPER) 1908
6251 Chess Festival Groningen Compact B · Tuesday 27 December 2022
HAMSTRA, B. (BAS) 1861
11232 Chessfestival Groningen Vierkampen Groep A · Tuesday 23 December 2025
HOFSTEE, P. (PIET) 1799
11232 Chessfestival Groningen Vierkampen Groep A · Monday 22 December 2025
JONG DE, A. (AUKE) 1797
10705 KNSB competitie 2024-2025 Klasse 5 ronde 6 · Saturday 8 March 2025
WESTERMANN, O.A. (TONY) 1794
8855 Open Junivierkampen Groninger Combinatie Groep A · Thursday 13 June 2024
Worst losses
KARSDORP, G.N. (NICO) 1641
6732 KNSB competitie 2022-2023 Klasse 4 ronde 7 · Saturday 11 March 2023
POTJER, G.C. (GERARD) 1643
7102 Open Junivierkampen Groninger Combinatie Groep A · Thursday 15 June 2023
GROOT DE, H. (HARRY) 1646
6841 NOSBO competitie 2022-2023 Maart 2023 · Monday 20 March 2023
HUISSTEDE VAN, A. (ALEX) 1691
7102 Open Junivierkampen Groninger Combinatie Groep A · Thursday 22 June 2023
KREMER, K. (KAJ) 1745
9951 KNSB competitie 2024-2025 Klasse 5 ronde 3 · Saturday 23 November 2024
Chessfestival Groningen Vierkampen Groep A Monday 22 December 2025 +3–0=0 +40.5
Chess Festival Groningen Vierkampen Saturday 21 December 2024 +1–0=2 +12.1
NOSBO-competitie 2025-2026 ronde 6 (minus één uitgestelde wedstrijd)… Monday 16 March 2026 +1–0=0 +8.0
NOSBO-competitie 2025-2026 ronde 5 (minus één uitgestelde wedstrijd)… Monday 16 February 2026 +1–0=0
NOSBO-competitie 2025-2026 ronde 4 Groep A Monday 19 January 2026 +0–1=0 -13.4
NOSBO-competitie 2025-2026 ronde 3 Groep A Friday 28 November 2025 +0–0=1 +1.2
NOSBO-competitie 2025-2026 ronde 2 Groep A Monday 10 November 2025 +0–1=0 -10.2
NOSBO-competitie 2025-2026 ronde 1 Klasse 1A Monday 13 October 2025 +1–0=0
KNSB competitie 2025-2026 Klasse 5 ronde 5 Saturday 20 September 2025 +0–0=1 +3.9
KNSB competitie 2025-2026 Klasse 5 ronde 6 Saturday 20 September 2025 +0–0=1 +1.3
KNSB competitie 2025-2026 Klasse 5 Ronde 3 Saturday 20 September 2025 +0–1=0
KNSB competitie 2025-2026 Klasse 5 ronde 2 Saturday 20 September 2025 +0–1=0 -6.1
KNSB competitie 2025-2026 Klasse 5 ronde 1 Saturday 20 September 2025 +0–1=0 -12.6
Open Junivierkampen Groninger Combinatie Groep A Thursday 5 June 2025 +1–2=0 -16.5
NOSBO competitie 2024-2025 April 2025 Saturday 1 March 2025 +1–0=0 +7.7
NOSBO competitie 2024-2025 Januari 2025 Monday 13 January 2025 +0–1=0 -7.5
NOSBO competitie 2024-2025 Mei 2025 Wednesday 1 January 2025 +1–0=0 +4.0
NOSBO competitie 2024-2025 Maart 2025 Wednesday 1 January 2025 +0–1=0 -13.8
NOSBO competitie 2024-2025 November 2024 Monday 14 October 2024 +1–0=0 +9.4
KNSB competitie 2024-2025 Klasse 5 ronde 6 Saturday 21 September 2024 +1–0=0 +11.8
KNSB competitie 2024-2025 Klasse 5 ronde 5 Saturday 21 September 2024 +0–0=1 0.0
KNSB competitie 2024-2025 Klasse 5 ronde 4 Saturday 21 September 2024 +1–0=0 +11.4
KNSB competitie 2024-2025 Klasse 5 ronde 3 Saturday 21 September 2024 +0–1=0 -7.0
KNSB competitie 2024-2025 Klasse 5 ronde 2 Saturday 21 September 2024 +1–0=0 +11.3
KNSB competitie 2024-2025 Klasse 5 ronde 1 Saturday 21 September 2024 +0–1=0 -14.4
Open Junivierkampen Groninger Combinatie Groep A Wednesday 5 June 2024 +3–0=0 +28.2
NOSBO-competitie 2023-2024 April 2024 Sunday 1 October 2023 +1–0=1 +6.4
NOSBO-competitie 2023-2024 Maart 2024 Sunday 1 October 2023 +0–0=1 -11.5
NOSBO competitie 2023-2024 November 2023 Sunday 1 October 2023 +0–0=1 -8.0
KNSB competitie 2023-2024 Klasse 5 ronde 6 Saturday 16 September 2023 +1–0=0
KNSB competitie 2023-2024 Klasse 5 ronde 2 Saturday 16 September 2023 +0–1=0 -8.2
Open Junivierkampen Groninger Combinatie Groep A Thursday 8 June 2023 +1–2=0 -10.9
Chess Festival Groningen Compact B Wednesday 21 December 2022 +2–3=0 +24.6
NOSBO competitie 2022-2023 April 2023 Monday 24 October 2022 +1–0=0 +12.9
NOSBO competitie 2022-2023 Maart 2023 Monday 24 October 2022 +0–1=0 -13.2
NOSBO competitie 2022-2023 Februari 2023 Monday 24 October 2022 +1–0=0 +7.8
KNSB competitie 2022-2023 Klasse 4 ronde 9 Saturday 17 September 2022 +0–0=1 +2.7
KNSB competitie 2022-2023 Klasse 4 ronde 8 Saturday 17 September 2022 +0–0=1 +2.5
KNSB competitie 2022-2023 Klasse 4 ronde 7 Saturday 17 September 2022 +0–1=0 -13.4
KNSB competitie 2022-2023 Klasse 4 ronde 6 Saturday 17 September 2022 +0–1=0 -8.0
KNSB competitie 2022-2023 Klasse 4 ronde 5 Saturday 17 September 2022 +1–0=0 +16.8

Rating History

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Peak Ratings

Classic 1826 June 1, 2025
Rapid 1822 May 1, 2026
Blitz 1822 May 1, 2026

Games

Wins 25
Losses 20
Draws 11
Win Rate 45%

Performance by Color

Color Wins Draws Losses Win Rate
White 16 6 9 52%
Black 9 5 11 36%

Recent Matches

Ros, G. (Gerke) (1924) Saturday 28 March 2026 DRAW +3.9
Aleman, J.A.A. (Johan) (1675) Monday 16 March 2026 WIN +8.0
Kleine de, R.F. (Roderick) Friday 20 February 2026 WIN
Kunnen, R. (Ruurd) (1845) Saturday 7 February 2026 DRAW +1.3
Putten van, A. (Anne) (1795) Monday 19 January 2026 LOSS -13.4
Kleijn de, M. (Max) (1768) Wednesday 24 December 2025 WIN +12.1
Hamstra, B. (Bas) (1861) Tuesday 23 December 2025 WIN +15.3
Hofstee, P. (Piet) (1799) Monday 22 December 2025 WIN +13.2
Broekman, R. (Roel) (1830) Thursday 4 December 2025 DRAW +1.2
Beijer, S.L. (Simon) Saturday 22 November 2025 LOSS
Brandsma, F. (Frits) (1863) Monday 10 November 2025 LOSS -10.2
Faber, A. (Ab) (1995) Saturday 1 November 2025 LOSS -6.1
Bodewits, M.W. (Maxim) Monday 13 October 2025 WIN
Kolijn, D. (David) (1805) Saturday 4 October 2025 LOSS -12.6
Westermann, O.A. (Tony) (1739) Thursday 19 June 2025 WIN +9.5
Dijkstra, T.C. (Theo) (1802) Thursday 12 June 2025 LOSS -13.3
Karsdorp, G.N. (Nico) (1820) Thursday 5 June 2025 LOSS -12.7
Homan-Free, B.E.H. (Bernier) (1539) Monday 12 May 2025 WIN +4.0
Endema, H.J. (Harry) (1669) Monday 7 April 2025 WIN +7.7
Vaessen, L. (Lucas) (1780) Monday 10 March 2025 LOSS -13.8