KNSB FIDE
SW

Siem Westerhof

Rated since January 2023

1622 Classic
1660 Rapid
1750 Blitz

RIVALRY

Not enough games to determine rivalries yet.

The good & the bad

Best wins
POLMAN, J.A.P. (HANS) 1870
12381 Oostelijk snelschaakkampioenschap Groep A · Saturday 3 January 2026
OOSTERINK, H.W. (HENK) 1800
12381 Oostelijk snelschaakkampioenschap Groep A · Saturday 3 January 2026
RAI, A. (ATHARV) 1758
13935 Afdeling Oost, JCC categorie C Groep A · Saturday 6 June 2026
HATTUM VAN, A.H. (LEX) 1750
12381 Oostelijk snelschaakkampioenschap Groep A · Saturday 3 January 2026
BOOY, W.A. (WILLEM) 1666
14159 Open NK Schaken 2026 Reserve C · Sunday 26 July 2026
Worst losses
HEINER, W.N. (WILLEM) 1416
13935 Afdeling Oost, JCC categorie C Groep A · Saturday 6 June 2026
BERENDS, D. (DANI) 1500
12381 Oostelijk snelschaakkampioenschap Groep A · Saturday 3 January 2026
BERENDS, C. (COLIN) 1560
12381 Oostelijk snelschaakkampioenschap Groep A · Saturday 3 January 2026
BAKHRU, D. (DEEPESH) 1582
10471 Tata Steel Chess Tournament 2026 Weekendvierkampem · Sunday 18 January 2026
HEINEN, W.J. (WIM) 1604
10471 Tata Steel Chess Tournament 2026 Weekendvierkampem · Friday 16 January 2026
Open NK Schaken 2026 Reserve C Tuesday 21 July 2026 +2–4=2 -9.4
18de BPB Limburg Open 2026 Groep D Friday 22 May 2026 +3–2=1 +17.3
Jeugd Weekendtoernooi Twente Groep A Friday 27 February 2026 +2–2=1 +47.8
85e Daniel Noteboomtoernooi Groep C Friday 20 February 2026 +1–2=1 -23.8
Tata Steel Chess Tournament 2026 Weekendvierkampem Friday 16 January 2026 +1–2=0 -9.0
Oostelijk snelschaakkampioenschap Groep A Saturday 3 January 2026 +10–10=0 +117.6
41. Internationales Boeblinger Open B Friday 26 December 2025 +0–1=0 -5.0
Afdeling Oost, JCC categorie C Groep A Saturday 6 June 2026 +4–1=0 +33.1
KNSB competitie 2025-2026 Klasse 4 ronde 7 Saturday 20 September 2025 +0–1=0 -3.6

Team Competition

Current team
Doetinchem 1
Klasse 4B · 2025-2026 · 4 games
Past teams
Doetinchem 1
Klasse 5C · 2024-2025
Doetinchem 1
Klasse 5C · 2023-2024

Rating History

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Peak Ratings

Classic 1656 June 1, 2025
Rapid 1660 Aug. 1, 2026
Blitz 1750 March 1, 2026

Games

Wins 23
Losses 25
Draws 5
Win Rate 43%

Performance by Color

Color Wins Draws Losses Win Rate
White 13 3 10 50%
Black 10 2 15 37%

Recent Matches

Beek van der, S. (Simon) (1691) Wednesday 29 July 2026 LOSS -16.1
Doorn, W.J. (Wouter) (1673) Monday 27 July 2026 LOSS -17.1
Booy, W.A. (Willem) (1666) Sunday 26 July 2026 WIN +22.5
Lunek, F. (Ferry) (1707) Saturday 25 July 2026 LOSS -15.3
Jongejan, H.E. (Eviënne) (1514) Friday 24 July 2026 WIN +14.2
Kommer, R. (Rink) Thursday 23 July 2026 LOSS
Smit, T. (Tom) (1506) Wednesday 22 July 2026 DRAW -6.3
Hofstee, P. (Piet) (1785) Tuesday 21 July 2026 DRAW +8.7
Overeem, T. (Timothy) (1294) Saturday 6 June 2026 WIN +5.5
Meulemeesters, T. (Tijmen) (1589) Saturday 6 June 2026 WIN +19.0
Golmohammadzadeh, A. (Alvand) (1426) Saturday 6 June 2026 WIN +10.5
Rai, A. (Atharv) (1758) Saturday 6 June 2026 WIN +28.1
Heiner, W.N. (Willem) (1416) Saturday 6 June 2026 LOSS -29.9
Penugurti, A.S. (Advika Satya) (1490) Monday 25 May 2026 DRAW -5.2
Tyurkoglu, R.T. (Redzhep) Sunday 24 May 2026 LOSS
Kindts, Christelle (1459) Sunday 24 May 2026 WIN +13.2
Derinskii, V. (Viacheslav) Saturday 23 May 2026 LOSS
Lecki, Nathan Saturday 23 May 2026 WIN
Slangen-Knuit, G. (Dien) (1373) Friday 22 May 2026 WIN +9.2
Formanoy, D. (David) (1706) Sunday 1 March 2026 DRAW +8.9