 The ICU promotes chess in Ireland and maintains the chess rating for players registered with the ICU, which are published monthly.It runs competitions such as the Irish Chess Championship and selects teams to participate in international competitions for Ireland.In 2005, in a dispute over fees, the Ulster Chess Union (UCU), which administers and develops chess in Northern Ireland, decided to end its affiliation with the Irish Chess Union, although the UCU accepted the ICU's continued organisation of the All-Ireland Championships.