Chiel Koster

NED · 28 yrs · K=20 · Peak 2226 (Oct 2026)

Best performance: 2460 at Dutch Team Competition 2025-2026 Klasse 2C(Best of 2026)

World #=6936 live9#6,927 publishedNetherlands #=233

OCT26 Rating

2226

Live Rating

2226.0

Change

0.0

Games Played

Rating History · Classical

Loading chart…

Classical games since the October list

No rated standard games this rating periodsince the OCT26 list (Oct 1, 2026)

	Last played	Score	TPR
	Dutch Team Competition 2026-2027 Klasse 1BSep 19 – Apr 17, 2027	1/1	—

The live rating moves only when new rated games are played. Until then it matches the published rating.

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 1B—(1)
Sep 2026 – Apr 2027Teamfederation source
Score 1/1Opp avg 2392Start 2211
Dutch Team Competition 2025-2026 Klasse 2C2460
Sep 2025 – Apr 2026Teamfederation source
Best of 2026Score 5½/7Opp avg 2230Start 2163
17th BPB Limburg Open 2025 Group A2256
Jun 2025Swissfederation source
Best of 2025Score 4/7Opp avg 2206Start 2141
15e WLC Weekendtoernooi: Groep A2217
May 2025Swissfederation source
#2 in 2025Score 3½/5Opp avg 2068Start 2123
Dutch Team Competition 2024-2025 - Klasse 3 Round 9—(1)
May 2025Teamfederation source
Score 1/1Opp avg 1939Start 2123
Dutch Team Competition 2024-2025 - Klasse 3 Round 8—(1)
Apr 2025Teamfederation source
Score 1/1Opp avg 1992Start 2116
Dutch Team Competition 2024-2025 - Klasse 3 Round 7—(1)
Mar 2025Teamfederation source
Score 1/1Opp avg 1838Start 2113
Dutch Team Competition 2024-2025 - Klasse 3 Round 6—(1)
Feb 2025Teamfederation source
Score ½/1Opp avg 2210Start 2110
Dutch Team Competition 2024-2025 - Klasse 3 Round 5—(1)
Dec 2024Teamfederation source
Score 1/1Opp avg 2085Start 2100
Dutch Team Competition 2024-2025 - Klasse 3 Round 4—(1)
Nov 2024Teamfederation source
Score ½/1Opp avg 2170Start 2093
Dutch Team Competition 2024-2025 - Klasse 3 Round 3—(1)
Oct – Nov 2024Teamfederation source
Score 1/1Opp avg 1838Start 2093
Dutch Team Competition 2024-2025 - Klasse 3 Round 1—(1)
Sep 2024Teamfederation source
Score 1/1Opp avg 2017Start 2085
Dutch Open Championship 20242180
Jul – Aug 2024Swissfederation source
Best of 2024Score 4½/9Opp avg 2180Start 2058
14e WLC Weekendtoernooi: Groep A2128
May – Jun 2024Swissfederation source
#2 in 2024Score 3½/6Opp avg 2071Start 2046
Dutch Team Competition 2023-2024 - Klasse 2 Round 9—(1)
Apr 2024Teamfederation source
Score 1/1Opp avg 2171Start 2032
Dutch Team Competition 2023-2024 - Klasse 2 Round 7—(1)
Mar 2024Teamfederation source
Score 0/1Opp avg 2257Start 2036
Dutch Team Competition 2023-2024 - Klasse 2 Round 6—(1)
Feb 2024Teamfederation source
Score 1/1Opp avg 2029Start 2026
Dutch Team Competition 2023-2024 - Klasse 2 Round 3—(1)
Nov 2023Teamfederation source
Score 0/1Opp avg 2202Start 2032
Dutch Team Competition 2023-2024 - Klasse 2 Round 2—(1)
Oct 2023Teamfederation source
Score 0/1Opp avg 2165Start 2039
Dutch Team Competition 2023-2024 - Klasse 2 Round 1—(1)
Sep 2023Teamfederation source
Score 0/1Opp avg 2145Start 2046
Dutch Open Championship 20232025
Jul – Aug 2023Swissfederation source
Best of 2023Score 2½/8Opp avg 2166Start 2052

Rated near Chiel Koster · Classical

World

#6935Gemelli,Romain2226.4
#=6936FMJermo Kooijmans2226.0
#=6936CMChiel Koster2226.0
#=6936FMMarija Kuznecova2226.0
#=6936Philipp Schmitz2226.0

Netherlands

#=231Raymond De Rooij2227.0
#=233FMJermo Kooijmans2226.0
#=233CMChiel Koster2226.0
#235CMThomas Mollema2225.0
#236CMRemco Sprangers2224.8

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