Thomas Maser

USA · 84 yrs · K=20 · Peak 2171 (By Jan 2005)

Best performance: 2147 at GM Marcel Sisniega Marathon(Best of 2017)

OCT26 Rating

1813

Live Rating

1813.0

Change

0.0

Games Played

How live ratings are calculated

Rating History · Classical

Loading chart…

Official classical rating by month

List	Rating	Change
Nov 2026	1813	0
Oct 2026	1813	0
Sep 2026	1813	0
Aug 2026	1813	0
Jul 2026	1813	0
Jun 2026	1813	0
May 2026	1813	0
Apr 2026	1813	0
Mar 2026	1813	0
Feb 2026	1813	0
Jan 2026	1813	0
Dec 2025	1813	0

Classical games since the October list

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

	Last played	Score	TPR
	GM George Koltanowski Memorial 2024Feb 16, 2024 – Mar 22, 2024TPR 1635	1½/4	1635

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

Event timeline · Classical

50 of 66 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.

GM George Koltanowski Memorial 20241635
Feb – Mar 2024Swissfederation source
Best of 2024Score 1½/4Opp avg 1635Start 1697
2022 Calchess Senior State Championship—(1)
Jun 2022Swissfederation source
Score 0/1Opp avg 1716Start 1707
2021 Berkeley Chess Club Championship1262
Oct – Dec 2021Swissfederation source
#5 in 2021Score 1/5Opp avg 1455Start 1760
2021 GM Walter Browne Marathon1677
Sep – Oct 2021Swissfederation source
#4 in 2021Score 3/5Opp avg 1605Start 1752
2021 IM John Grefe Marathon1823
Aug – Sep 2021Swissfederation source
Best of 2021Score 3/5Opp avg 1728Start 1752
2021 GM Koltanowski Marathon1759
Jun – Jul 2021Swissfederation source
#3 in 2021Score 3/5Opp avg 1759Start 1756
2021 Calchess Senior State Championship—(1)
Jul 2021Swissfederation source
Score ½/1Opp avg 1988Start 1758
2021 Felix German Memorial Tuesday Night Marathon—(1)
Jun 2021Swissfederation source
Score 0/1Opp avg 1703Start 1756
Return of the King 20211781
May – Jun 2021Swissfederation source
#2 in 2021Score 2½/4Opp avg 1686Start 1756
GM Koltanowski Marathon 2020738
Feb – Mar 2020Swissfederation source
Score 0/3Opp avg 1538Start 1796
Max Wilkerson Memorial 2020 Tuesday Night Marathon - AB—(2)
Jan – Feb 2020Swissfederation source
Score ½/2Opp avg 1663Start 1796
IM John Grefe Marathon 20202111
Jan – Feb 2020Swissfederation source
Best of 2020Score 3/4Opp avg 1918Start 1796
Berkeley Club Championship 20191722
Oct – Dec 2019Swissfederation source
#9 in 2019Score 3½/7Opp avg 1722Start 1868
Fall 2019 Tuesday Night Marathon1671
Oct – Dec 2019Swissfederation source
#10 in 2019Score 1/6Opp avg 1911Start 1868
2019 Walter Shipman Marathon1766
Aug – Oct 2019Swissfederation source
#8 in 2019Score 4/6Opp avg 1641Start 1861
2019 Steve Brandwein Memorial Tuesday Night Marathon - U20001785
Aug – Oct 2019Swissfederation source
#6 in 2019Score 5/9Opp avg 1690Start 1861
2019 Neil Falconer Marathon1948
Jul – Aug 2019Swissfederation source
#2 in 2019Score 3/5Opp avg 1876Start 1880
Summer 2019 Tuesday Night Marathon1783
May – Jul 2019Swissfederation source
#7 in 2019Score 2/7Opp avg 1941Start 1872
2019 GM Walter Browne Marathon1852
May – Jun 2019Swissfederation source
#5 in 2019Score 4/5Opp avg 1659Start 1872
Spring 2019 Tuesday Night Marathon - U20001863
Mar – May 2019Swissfederation source
#4 in 2019Score 4/7Opp avg 1806Start 1843
2019 GM Koltanowski Memorial—(2)
Mar – Apr 2019Swissfederation source
Score 2½/3Opp avg 1625Start 1843
Berkeley Senior Championship1969
Mar 2019Swissfederation source
Best of 2019Score 3/4Opp avg 1776Start 1843
2019 IM John Grefe Marathon1910
Jan – Mar 2019Swissfederation source
#3 in 2019Score 4/6Opp avg 1785Start 1814
Winter 2019 Tuesday Night Marathon2506
Jan – Feb 2019Swissfederation source
Score 5/5Opp avg 1706Start 1814
Fall 2018 Tuesday Night Marathon1809
Oct – Dec 2018Swissfederation source
#4 in 2018Score 5/7Opp avg 1737Start 1829

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