KNSB FIDE
SW

Siem Westerhof

Rated since June 2024

1585 Classical
1657 Blitz

The good & the bad

Best wins
POLMAN, HANS 1792
OSBO Snelschaakkampioenschap 2026 · 2026-01-03
VAN HATTUM, LEX 1743
OSBO Snelschaakkampioenschap 2026 · 2026-01-03
VAN HATTUM, LEX 1743
OSBO Snelschaakkampioenschap 2026 · 2026-01-03
KAPPERT, PETER 1708
OSBO Snelschaakkampioenschap 2026 · 2026-01-03
GLAS, SUSANNE 1662
Tata Steel Chess 2026 - Weekendvierkampen · 2026-01-16
Worst losses
BLOM, MARTIN 1670
85e Noteboomtoernooi · 2026-02-20
BINNENDIJK-VOORTMAN, INEKE 1729
OSBO Snelschaakkampioenschap 2026 · 2026-01-03
LUKACS, MIRKO 1744
OSBO Snelschaakkampioenschap 2026 · 2026-01-03
POLMAN, HANS 1792
OSBO Snelschaakkampioenschap 2026 · 2026-01-03
JAUCH, BERND 1859
41. Internationales Boeblinger Open B · 2025-12-26

FIDE Tournaments

Jeugd Weekendtoernooi Twente 2026 2026-02-27 +2–1=1 +24.0
Dutch Team Competition - klasse 4 Round 7 2026-02-07 +0–1=0 -5.2
85e Noteboomtoernooi 2026-02-20 +0–1=0 -15.2
41. Internationales Boeblinger Open B 2025-12-26 +0–1=0 -6.0
Tata Steel Chess 2026 - Weekendvierkampen 2026-01-16 +1–0=0 +25.6
OSBO Snelschaakkampioenschap 2026 2026-01-03 +5–7=0 +96.4
Dutch Team Competition - klasse 4 Round 5 2025-12-13 +0–1=0 -4.4
85e Daniel Noteboomtoernooi Groep C Friday 20 February 2026 +1–2=1 -23.8

Rating History

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Peak Ratings

Classical 1641
Blitz 1657

Games

Wins 8
Losses 12
Draws 1
Win Rate 38%

Performance by Color

Color Wins Draws Losses Win Rate
White 3 1 6 30%
Black 5 0 6 45%

All-time Games (from rating history)

Classical 31
Blitz 12

Recent Matches

Jongejan, Evienne (1504) 2026-02-27 WIN +15.6
Brorens, Victor 2026-02-27 LOSS -3.2
Bos, Yaro (1476) 2026-02-27 WIN +14.4
Formanoy, David (1532) 2026-02-27 DRAW -2.8
Denys, K.f.j. (karl) (1901) 2026-02-07 LOSS -5.2
Blom, Martin (1670) 2026-02-20 LOSS -15.2
Jauch, Bernd (1859) 2025-12-26 LOSS -6.0
Glas, Susanne (1662) 2026-01-16 WIN +25.6
Stork, Ornett 2026-01-03 LOSS -3.2
Binnendijk-Voortman, Ineke (1729) 2026-01-03 LOSS -11.2
Westerhof, Fleur (1922) 2026-01-03 LOSS -4.0
Remmerts, John (1869) 2026-01-03 LOSS -5.6
Lukacs, Mirko (1744) 2026-01-03 LOSS -10.4
Schoffelmeer, Jetse (1891) 2026-01-03 LOSS -4.8
Koeweiden, Theo (1656) 2026-01-03 WIN +25.2
Kappert, Peter (1708) 2026-01-03 WIN +28.0
Van Hattum, Lex (1743) 2026-01-03 WIN +29.6
Van Hattum, Lex (1743) 2026-01-03 WIN +29.6
Polman, Hans (1792) 2026-01-03 WIN +31.6
Polman, Hans (1792) 2026-01-03 LOSS -8.4
Knoop, B. (bram) (1916) 2025-12-13 LOSS -4.4