The Leinster Chess Championship is an annual chess competition in Ireland, which was first played in 1912. It is run by the Leinster Chess Union and the winner is declared Leinster Champion. In recent years the competition has been in conjunction with another tournament, the City of Dublin (1999), the Irish Open (2001, 2003) and since 2012 as part of the Malahide Millennium Chess tournament.[1]