Siem Westerhof

NED · 13 yrs · K=40 · Peak 1641 (Feb 2025)

Best performance: 1723 at Jeugd Weekendtoernooi Twente(Best of 2026)

World #=149070 live2483#146,587 publishedNetherlands #4537

OCT26 Rating

1604

Live Rating

1600.8

Change

-3.2

Games Played

Rating History · Classical

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Classical games since the October list

	Tournament	Score	Change	TPR	After
	Dutch Team Competition 2026-2027 Klasse 7COct 3 – Apr 3, 2027TPR 1545	½/1	-3.2	1545	1600.8

Event timeline · Classical

21 events

Events before the current rating period show the performance, not a rating change.

Live events show the rating change; earlier events show the performance rating.

Dutch Team Competition 2026-2027 Klasse 7C-3.2
Oct 2026 – Apr 2027Teamfederation source
Score ½/1Opp avg 1545Start 1604
Summer Prague Open 2026 - B1614
Aug 2026Swisschess-results.com
#2 in 2026Score 2/9Opp avg 1614Start 1606
Dutch Open 2026 - Reserve C1601
Jul 2026Swissfederation source
#3 in 2026Score 3/8Opp avg 1651Start 1611
18th BPB Limburg Open 2026 - group D—(2)
May 2026Swisschess-results.com
Score 3½/7Opp avg 1450Start 1585
Dutch Team Competition 2025-2026 Klasse 4B1119
Sep 2025 – Apr 2026Teamfederation source
Score 0/4Opp avg 1919Start 1605
grenke Chess Open 2026 C-Open—(0)
Apr 2026Swissfederation source
Score 4/9Start 1585
Jeugd Weekendtoernooi Twente1723
Feb – Mar 2026Swisschess-results.com
Best of 2026Score 2½/5Opp avg 1628Start 1583
85e Noteboomtoernooi—(1)
Feb 2026Swissfederation source
Score 2½/5Opp avg 1670Start 1583
Tata Steel Chess 2026 - Weekendvierkampen—(1)
Jan 2026Round robinfederation source
Score 1/3Opp avg 1662Start 1563
41. Internationales Boeblinger Open B—(1)
Dec 2025Swissfederation source
Score 0/2Opp avg 1859Start 1567
Schach Tirol Open 2025 Group C—(2)
Aug 2025Swissfederation source
Score 5/8Opp avg 1538Start 1625
Dutch Open 2025 - Reserve C1569
Jul 2025Swissfederation source
Best of 2025Score 4½/9Opp avg 1569Start 1625
Dutch Team Competition 2024-2025 - Klasse 5 Round 7—(1)
Apr 2025Teamfederation source
Score 0/1Opp avg 1730Start 1640
Dutch Team Competition 2024-2025 - Klasse 5 Round 5—(0)
Feb 2025Teamfederation source
Score 1/1Start 1641
Tata Steel Chess 2025 - Weekendvierkampen—(1)
Jan 2025Round robinfederation source
Score 2/3Opp avg 1678Start 1618
Dutch Team Competition 2024-2025 - Klasse 5 Round 4—(0)
Dec 2024Teamfederation source
Score ½/1Start 1618
Dutch Team Competition 2024-2025 - Klasse 5 Round 3—(1)
Nov 2024Teamfederation source
Score ½/1Opp avg 1751Start 1610
Dutch Team Competition 2024-2025 - Klasse 5 Round 1—(1)
Oct 2024Teamfederation source
Score ½/1Opp avg 1777Start 1601
16th BPB Limburg Open 2024 Group C21544
May 2024Swissfederation source
Best of 2024Score 2½/7Opp avg 1646
Chessfestival Groningen 2023 Vierkampen—(0)
Dec 2023Swissfederation source
Score 1½/3
Dutch Team Competition 2023-2024 - Klasse 5 Round 3—(0)
Nov 2023Teamfederation source
Score 1/1

Recent opponents · Classical

Remko Mooij

Rated near Siem Westerhof · Classical

World

#=148695W M M Amodya Jayatilaka1601.0
#=148695M A Thakshala Rathnanjali1601.0
#=149070Siem Westerhof1600.8
#=149070Giuseppe Pinazza1600.8
#=149070Vojtech Lukes1600.8

Netherlands

#4535Diederik Kruijssen1602.0
#4536Aadith Eswar1601.0
#4537Siem Westerhof1600.8
#=4538Nizar Alayoubi1600.0
#=4538Dhruv Lobo1600.0

Live ratings projected from the OCT26 published list · Not affiliated with FIDE