John Erthmann

DEN · 76 yrs · K=20 · Peak 1798 (May 2024)

Best performance: 1893 at Kolding Skakklubs vinter-EMT 2024 - 2 Round 1-3(Best of 2024)

World #=90426 live1917#88,509 publishedDenmark #=1617

OCT26 Rating

1763

Live Rating

1765.0

Change

+2.0

Games Played

How live ratings are calculated

Rating History · Classical

Loading chart…

Official classical rating by month

List	Rating	Change
Oct 2026	1763	0
Sep 2026	1763	0
Aug 2026	1763	0
Jul 2026	1763	0
Jun 2026	1763	0
May 2026	1763	0
Apr 2026	1763	0
Mar 2026	1763	0
Feb 2026	1763	0
Jan 2026	1763	+2
Dec 2025	1761	-8
Nov 2025	1769	0

Classical games since the October list

	Tournament	Score	Change	TPR	After
	Kolding Skakklubs interne klubmesterskabOct 5 – Jan 25, 2027TPR 1832	½/1	+2.0	1832	1765.0

Event timeline · Classical

50 of 55 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.

Kolding Skakklubs interne klubmesterskab+2.0
Oct 2026 – Jan 2027Round robinfederation source
Score ½/1Opp avg 1832Start 1763
Sydjysk HK Team 2025-26 December—(1)
Dec 2025Teamfederation source
Score ½/1Opp avg 1824Start 1761
Sydjysk HK Team 2025-26 November—(1)
Nov 2025Teamfederation source
Score 0/1Opp avg 1845Start 1769
Kolding Skakklubs vinter-EMT 2025 - 2 Round 4-5—(2)
Feb – Mar 2025Round robinfederation source
Score 1½/2Opp avg 1781Start 1777
Sydjysk HK Team 2024-2025 Mar—(2)
Mar 2025Teamfederation source
Score ½/2Opp avg 1717Start 1772
Kolding Skakklubs vinter-EMT 2025 - 2 Round 1-31833
Feb 2025Round robinfederation source
Best of 2025Score 2/3Opp avg 1708Start 1777
Sydjysk HK Team 2024-2025 Jan-Feb1675
Jan – Feb 2025Teamfederation source
#2 in 2025Score 1/3Opp avg 1800Start 1783
Kolding Skakklubs klubturnering 2024-25 Round 7—(1)
Dec 2024 – Jan 2025Swissfederation source
Score 0/1Opp avg 1950Start 1775
Kolding Skakklubs klubturnering 2024-25 Round 4-6—(1)
Nov – Dec 2024Swissfederation source
Score 1½/2Opp avg 1782Start 1786
Sydjysk HK Team 2024-2025 December—(1)
Dec 2024Teamfederation source
Score 1/1Opp avg 1698Start 1775
Sydjysk HK Team 2024-2025 November—(1)
Nov 2024Teamfederation source
Score 0/1Opp avg 1747Start 1786
Kolding Skakklubs klubturnering 2024-25 Round 1-31644
Oct – Nov 2024Swissfederation source
#2 in 2024Score 1/3Opp avg 1769Start 1798
Kolding Skakklubs vinter-EMT 2024 - 2 Round 4-5—(2)
Apr 2024Round robinfederation source
Score 1/2Opp avg 1849Start 1795
Kolding Skakklubs vinter-EMT 2024 - 2 Round 1-31893
Mar 2024Round robinfederation source
Best of 2024Score 2/3Opp avg 1768Start 1789
Sydjysk-HK Team 2023-24 Jan-Feb—(1)
Jan – Feb 2024Teamfederation source
Score 0/1Opp avg 1582Start 1661
Sydjysk-HK Team 2023-24 December—(1)
Nov – Dec 2023Teamfederation source
Score ½/1Opp avg 1908Start 1641
Sydjysk-HK Team 2023-24 November—(2)
Oct – Nov 2023Teamfederation source
Score 1/2Opp avg 1958Start 1641
Sydjysk HK Team March—(2)
Feb – Mar 2023Teamfederation source
Score 1/2Opp avg 1789Start 1629
Kolding Skakklub Vinter-EMT 2023 - 1 Round 4-51700
Feb – Mar 2023Round robinfederation source
Best of 2023Score 1/3Opp avg 1825Start 1629
Sydjysk HK Team February—(1)
Jan – Feb 2023Teamfederation source
Score 1/1Opp avg 1317Start 1629
Kolding Skakklub Vinter-EMT 2023 - 1 Round 1-3—(1)
Jan 2023Round robinfederation source
Score 1/2Opp avg 1873Start 1629
Sydjysk HK Team December—(1)
Dec 2022Teamfederation source
Score 1/1Opp avg 1379Start 1625
Sydjysk HK Team November—(2)
Oct – Nov 2022Teamfederation source
Score 0/2Opp avg 1720Start 1641
Sydjysk Team April—(1)
Feb – Mar 2022Teamfederation source
Score 1/1Opp avg 1572Start 1645
Sydjysk Team Marts—(1)
Jan – Feb 2022Teamfederation source
Score 0/1Opp avg 1538Start 1645

Recent opponents · Classical

Simon Kruse

Rated near John Erthmann · Classical

World

#=90426Jose Alejandro Silva Barajas1765.0
#=90426Mario Alberto Vega Sanchez1765.0
#=90426John Erthmann1765.0
#=90426Birgitte Brunsgaard Jacobsen1765.0
#=90426Steffen Petersen1765.0

Denmark

#1615Mathias Bogo1765.4
#1616Christoffer Vinther1765.2
#=1617John Erthmann1765.0
#=1617Birgitte Brunsgaard Jacobsen1765.0
#=1617Steffen Petersen1765.0

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