Jan Willem Koelmans

NED · 66 yrs · K=20 · Peak 2050 (Nov 2009)

Best performance: 2000 at Amsterdam Chess Festival 2026 - Group B(Best of 2026)

World #=61971 live353#61,618 publishedNetherlands #=2607

OCT26 Rating

1850

Live Rating

1850.0

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
	Summer Prague Open 2026 - BAug 7 – Aug 15TPR 1900	6½/9	1900

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

Event timeline · Classical

27 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.

Summer Prague Open 2026 - B1900
Aug 2026Swisschess-results.com
#2 in 2026Score 6½/9Opp avg 1734Start 1832
Amsterdam Chess Festival 2026 - Group B2000
Jul 2026Swissfederation source
Best of 2026Score 5/8Opp avg 1905Start 1787
HSG Open 2026 Group B1688
Jun 2026Swisschess-results.com
#6 in 2026Score 1½/6Opp avg 1837Start 1800
18th BPB Limburg Open 2026 - group C1808
May 2026Swisschess-results.com
#4 in 2026Score 4½/7Opp avg 1706Start 1800
DD Den Haag Open Kampioenschap 20261773
Feb – Mar 2026Swissfederation source
#5 in 2026Score 3½/6Opp avg 1898Start 1789
85e Noteboomtoernooi - Vierkampen—(2)
Feb 2026Swissfederation source
Score 2/3Opp avg 1812Start 1789
Tata Steel Chess 2026 - Tienkampen1832
Jan – Feb 2026Round robinfederation source
#3 in 2026Score 5/9Opp avg 1789Start 1783
2026 Chess.com Botwinnik Open - Vierkampen—(2)
Jan 2026Round robinfederation source
Score 2/3Opp avg 1778Start 1783
Chessfestival Groningen 2025 Open B1765
Dec 2025Swissfederation source
#4 in 2025Score 2½/8Opp avg 1906Start 1783
Amsterdam Chess Open 2025 Group C1698
Oct 2025Swissfederation source
#7 in 2025Score 2/5Opp avg 1698Start 1791
Lichtenberger Sommer 20251735
Aug 2025Swissfederation source
#5 in 2025Score 3½/9Opp avg 1815Start 1813
UniClass Amsterdam Science Park Chess Tournament 2025 - B1839
Jul 2025Swissfederation source
#3 in 2025Score 4/8Opp avg 1789Start 1806
HSG Open 2025 - Group B1910
Jun 2025Swissfederation source
Best of 2025Score 2½/4Opp avg 1815Start 1809
17th BPB Limburg Open 2025 Group C1728
Jun 2025Swissfederation source
#6 in 2025Score 3½/7Opp avg 1728Start 1809
DD Den Haag Open Kampioenschap 20251609
Feb – Mar 2025Swissfederation source
#8 in 2025Score 3/7Opp avg 1849Start 1827
Tata Steel Chess 2025 - Tienkampen1880
Jan – Feb 2025Round robinfederation source
#2 in 2025Score 5/8Opp avg 1823Start 1832
Chessfestival Groningen 2024 Compact1798
Dec 2024Swissfederation source
#3 in 2024Score 2/5Opp avg 1870Start 1832
Amsterdam Chess Open 2024 Group B1851
Nov 2024Swissfederation source
Best of 2024Score 2/5Opp avg 1923Start 1829
RSB Open 2024 Group B—(1)
Aug 2024Swissfederation source
Score 3/5Opp avg 1880Start 1838
OLOMOUC CHESS SUMMER 2024 - C1799
Aug 2024Swissfederation source
#2 in 2024Score 4½/9Opp avg 1842Start 1838
Amsterdam Science Park Chess Tournament 2024 - B1778
Jul 2024Swissfederation source
#5 in 2024Score 4½/9Opp avg 1778Start 1857
16th BPB Limburg Open 2024 Group B1796
May 2024Swissfederation source
#4 in 2024Score 3/7Opp avg 1921Start 1869
DD Den Haag Open Schaakkampioenschap 20241736
Feb – Mar 2024Swissfederation source
#6 in 2024Score 3½/5Opp avg 1641Start 1786
Tata Steel Chess 204 - Nine-round event1725
Jan 2024Round robinfederation source
#7 in 2024Score 3½/9Opp avg 1805Start 1793
Chessfestival Groningen 2023 Compact BCD1879
Dec 2023Swissfederation source
Best of 2023Score 2½/4Opp avg 1784Start 1793

Rated near Jan Willem Koelmans · Classical

World

#=61965Georgios Doumas1850.2
#=61965Patrick Rodriguez Gajlunas1850.2
#=61971Jan Willem Koelmans1850.0
#=61971Ronald Blok1850.0
#=61971Aly Khaled Mareiy1850.0

Netherlands

#=2604Julian Frijlink1850.6
#2606Pranav Prasobh Nair1850.4
#=2607Jan Willem Koelmans1850.0
#=2607Ronald Blok1850.0
#=2607Aad Van Gent1850.0

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