KNSB FIDE
SW

Siem Westerhof

Rated since January 2023

1584 Classic
1597 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
HATTUM VAN, A.H. (LEX) 1750
12381 Oostelijk snelschaakkampioenschap Groep A · Saturday 3 January 2026
KOEWEIDEN, T. (THEO) 1650
12381 Oostelijk snelschaakkampioenschap Groep A · Saturday 3 January 2026
GLAS, S. (SUSANNE) 1624
10471 Tata Steel Chess Tournament 2026 Weekendvierkampem · Saturday 17 January 2026
Worst losses
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
ANCEAUX, C.J. (CORNÉ) 1645
13121 85e Daniel Noteboomtoernooi Groep C · Saturday 21 February 2026
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
KNSB competitie 2025-2026 Klasse 4 ronde 7 Saturday 20 September 2025 +0–1=0 -3.6

Rating History

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Peak Ratings

Classic 1656 June 1, 2025
Rapid 1597 May 1, 2026
Blitz 1750 March 1, 2026

Games

Wins 14
Losses 18
Draws 2
Win Rate 41%

Performance by Color

Color Wins Draws Losses Win Rate
White 7 2 8 41%
Black 7 0 10 41%

Recent Matches

Formanoy, D. (David) (1706) Sunday 1 March 2026 DRAW +8.9
Bos, Y.Y. (Yaro) (1549) Sunday 1 March 2026 WIN +20.6
Brorens, V. (Victor) (1919) Saturday 28 February 2026 LOSS -3.7
Jongejan, H.E. (Eviënne) (1574) Saturday 28 February 2026 WIN +22.0
Bast, G. (Gijs) Friday 27 February 2026 LOSS
Badrinath, T. (Tijuvardan) Sunday 22 February 2026 WIN
Anceaux, C.J. (Corné) (1645) Saturday 21 February 2026 LOSS -14.2
Rutz, Alban Saturday 21 February 2026 DRAW
Blom, M.A. (Martin) (1738) Friday 20 February 2026 LOSS -9.7
Denys, K.F.J. (Karl) (1921) Saturday 7 February 2026 LOSS -3.6
Bakhru, D. (Deepesh) (1582) Sunday 18 January 2026 LOSS -17.5
Glas, S. (Susanne) (1624) Saturday 17 January 2026 WIN +24.8
Heinen, W.J. (Wim) (1604) Friday 16 January 2026 LOSS -16.3
Polman, J.A.P. (Hans) (1870) Saturday 3 January 2026 LOSS -7.3
Polman, J.A.P. (Hans) (1870) Saturday 3 January 2026 WIN +32.7
Hendriks, R.A.M. (Raymond) (1518) Saturday 3 January 2026 WIN +14.8
Hendriks, R.A.M. (Raymond) (1518) Saturday 3 January 2026 WIN +14.8
Hattum van, A.H. (Lex) (1750) Saturday 3 January 2026 WIN +27.4
Hattum van, A.H. (Lex) (1750) Saturday 3 January 2026 WIN +27.4
Oosterink, H.W. (Henk) (1800) Saturday 3 January 2026 WIN +29.8