The Championship Finals were the finals of a parrises squares championship.
The Starfleet Academy team faced the Minsk team in the parrises squares Championship Finals of 2324. It came as a big surprise when Starfleet Academy won, as the Minsk team was favored. Starfleet cadets threw a celebratory party that wreaked havoc on the academy grounds and took Boothby three weeks to repair. (TNG: "The First Duty")
M'Kota R'Cho was the only Klingon national that played parrises squares professionally, when he participated in the controversial Championship Finals of 2342. (VOY: "Year of Hell")