This is the start of a new feature on our website, for older players who are qualified to play in Senior tournaments.
Some of these (especially German Senior tournaments) are run on the 60+ age group rule, but FIDE events are organised in two age categories, based on your age at 31 December in the year concerned. If you were born in 1966 you will have to wait a few more months...
This photograph, showing Tim Harding in the foreground, was taken at the 2015 World Senior Championships at Acqui Terme, Italy, where the 2017 championships will be played in November.
Entries for that event close on 30 September. The qualification date is 31 December 1967 (for the 50+ Open and Women's tournaments) and 31 December 1952 for the 65+ championships.
For tournaments in 2018 the qualifying dates for the two FIDE age groups are one year later.
In England, there is also the annual Beacon Seniors (65+ and 50+) in Exmouth, Devon, from 6-10 November (5 rounds). Details can be downloaded here (PDF format). The qualifying date for age groups is 5 November 2017.