KNSB FIDE
JS

Jan Sier

Rated since January 2023

1673 Classic
1679 Rapid
1673 Blitz

RIVALRY

Not enough games to determine rivalries yet.

The good & the bad

Best wins
MAK, N. (NICO) 1771
9644 KNSB competitie 2024-2025 Klasse 5 ronde 1 · Saturday 12 October 2024
GROENHOFF, J.B. (JESPER) 1687
12245 NHSB-competitie 2025-2026 Klasse 3C t/m 12-10-2025 · Friday 10 October 2025
HUISMAN, T. (TON) 1622
12313 Schaken op de Dijk Achtkampen · Saturday 8 November 2025
HASSAN, ABDI 1401
12313 Schaken op de Dijk Achtkampen · Saturday 8 November 2025
Worst losses
VEERMAN, G.P.C. (GERARD) 1630
12313 Schaken op de Dijk Achtkampen · Saturday 8 November 2025
KERSSENS, P.J. (PIET) 1633
12304 NHSB-competitie 2025-2026 Klasse 3C t/m 09-11-2025 · Tuesday 4 November 2025
PEEREBOOM, G. (GERRIT) 1664
8899 NHSB lente-veteranentoernooi 2024 Groep B · Wednesday 3 April 2024
MEEMS, C. (CORNELIS) 1670
6859 NHSB-competitie 2022-2023 Klasse 1B t/m maart · Monday 20 March 2023
ENT, H. (HUGO) 1690
8899 NHSB lente-veteranentoernooi 2024 Groep B · Wednesday 27 March 2024
No FIDE-rated tournaments found.
Schaken op de Dijk Achtkampen Saturday 8 November 2025 +2–3=2 -15.5
NHSB-competitie 2025-2026 Klasse 3C t/m 21-12-2025 Monday 1 September 2025 +0–1=0 -10.4
NHSB-competitie 2025-2026 Klasse 3C t/m 09-11-2025 Monday 1 September 2025 +0–1=0 -16.6
NHSB-competitie 2025-2026 Klasse 2B t/m 02-11-2025 Monday 1 September 2025 +0–0=1 -7.8
NHSB-competitie 2025-2026 Klasse 3C t/m 12-10-2025 Monday 1 September 2025 +1–0=0 +13.9
KNSB competitie 2024-2025 Klasse 5 ronde 1 Saturday 21 September 2024 +1–0=0 +18.3
NHSB-competitie 2024-2025 Klasse 2B t/m 28-11-2024 Sunday 1 September 2024 +0–1=0 -10.9
NHSB-competitie 2024-2025 Klasse 2B t/m 26-10-2024 Sunday 1 September 2024 +0–0=1 +8.4
NHSB lente-veteranentoernooi 2024 Groep B Wednesday 28 February 2024 +0–3=3 -57.1
KNSB competitie 2023-2024 Klasse 5 ronde 4 Saturday 16 September 2023 +0–0=1
KNSB competitie 2022-2023 Klasse 4 ronde 9 Saturday 17 September 2022 +0–1=0 -6.4
NHSB-competitie 2022-2023 Klasse 1B t/m maart Thursday 1 September 2022 +0–1=0 -11.7
NHSB-competitie 2022-2023 Klasse 1B t/m december Thursday 1 September 2022 +0–0=1 +11.4

Rating History

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Peak Ratings

Classic 1735 March 1, 2024
Rapid 1679 Dec. 1, 2025
Blitz 1673 March 1, 2026

Games

Wins 4
Losses 11
Draws 9
Win Rate 17%

Performance by Color

Color Wins Draws Losses Win Rate
White 4 6 7 24%
Black 0 3 4 0%

Recent Matches

Zeilemaker, R.C. (Ronny) (1774) Monday 15 December 2025 LOSS -10.4
Hassan, Abdi (1401) Saturday 8 November 2025 WIN +4.3
Pruis, C.J. (Kees) (1713) Saturday 8 November 2025 DRAW +0.8
Alayoubi, N. (Nizar) (1695) Saturday 8 November 2025 LOSS -14.1
Veerman, G.P.C. (Gerard) (1630) Saturday 8 November 2025 LOSS -16.7
Doevendans, L. (Liam) (1730) Saturday 8 November 2025 DRAW +1.4
Huisman, T. (Ton) (1622) Saturday 8 November 2025 WIN +11.4
Kroon, T.D.D. (Thomas) (2080) Saturday 8 November 2025 LOSS -2.5
Kerssens, P.J. (Piet) (1633) Tuesday 4 November 2025 LOSS -16.6
Bovens, B.L. (Berend) (1477) Friday 31 October 2025 DRAW -7.8
Groenhoff, J.B. (Jesper) (1687) Friday 10 October 2025 WIN +13.9
Takken, C. (Kees) (1792) Tuesday 19 November 2024 LOSS -10.9
Mak, N. (Nico) (1771) Saturday 12 October 2024 WIN +18.3
Hoogenes, E. (Ernst) (1907) Tuesday 1 October 2024 DRAW +8.4
Folkertsma, P. (Peter) (1674) Wednesday 17 April 2024 DRAW -2.6
Vlugt, F. (Frans) (1784) Wednesday 10 April 2024 LOSS -13.3
Peereboom, G. (Gerrit) (1664) Wednesday 3 April 2024 LOSS -18.5
Ent, H. (Hugo) (1690) Wednesday 27 March 2024 LOSS -17.4
Bakker, W. (Willem) (1744) Wednesday 6 March 2024 DRAW +0.4
Spoelstra, S. (Sietse) (1420) Wednesday 28 February 2024 DRAW -5.7