Complex sentence: He was also Irish Chess Champion from 1886 to 1889 at Oxford he was a member of the Oxford University Chess Club, competing in a number of varsity matches against Cambridge, in the 1880s.
Split into simpler sentences: He was also Irish Chess Champion from 1886 to 1889. At Oxford he was a member of the Oxford University Chess Club, competing in a number of varsity matches against Cambridge in the 1880s.