From the end of 1960s to the mid-1970s, Hugh MacGrillen was one of Ireland's leading chess players.
In 1964 he won the Ulster Chess Championship.
After 1974, Hugh MacGrillen stopped participating in serious chess tournaments.
[1] Hugh MacGrillen played for Ireland in the Chess Olympiad:[2] Hugh MacGrillen played for Ireland in the World Student Team Chess Championships:[3]
This biographical article relating to an Irish chess figure is a stub.