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The Irish Football Association Challenge Cup, commonly referred to as the Irish Cup (currently known as the Sadler's Peaky Blinder Irish Cup for sponsorship purposes) is the primary football knock-out cup competition in Northern Ireland. Inaugurated in 1881, it is the fourth-oldest national cup competition in the world. Prior to the break-away from the Irish Football Association by clubs from what would become the Irish Free State in 1921, the Irish Cup was the national cup competition for the whole of Ireland.