 <p>You can have 6 unique games between 4 teams. There are 7 possible pairing hence 42 unique games.</p> <p>Each player pairs up with every other player only once and play against each one of them 6 times exactly.</p> <p>List:</p> <pre><code>Pairs 01: (1,2),(3,4),(5,6),(7,8) PairRound 1: GameRound 01: (1,2) - (3,4) | (5,6) - (7,8) GameRound 02: (1,2) - (7,8) | (3,4) - (5,6) GameRound 03: (1,2) - (5,6) | (3,4) - (7,8) Pairs 02: (1,3),(2,4),(5,7),(6,8) PairRound 2: GameRound 04: (1,3) - (2,4) | (5,7) - (6,8) GameRound 05: (1,3) - (6,8) | (2,4) - (5,7) GameRound 06: (1,3) - (5,7) | (2,4) - (6,8) Pairs 03: (1,4),(2,3),(5,8),(6,7) PairRound 3: GameRound 07: (1,4) - (2,3) | (6,7) - (5,8) GameRound 08: (1,4) - (5,8) | (2,3) - (6,7) GameRound 09: (1,4) - (6,7) | (2,3) - (5,8) Pairs 04: (1,5),(2,6),(3,7),(4,8) PairRound 4: GameRound 10: (1,5) - (2,6) | (3,7) - (4,8) GameRound 11: (1,5) - (4,8) | (2,6) - (3,7) GameRound 12: (1,5) - (3,7) | (2,6) - (4,8) Pairs 05: (1,6),(2,5),(3,8),(4,7) PairRound 5: GameRound 13: (1,6) - (2,5) | (3,8) - (4,7) GameRound 14: (1,6) - (4,7) | (2,5) - (3,8) GameRound 15: (1,6) - (3,8) | (2,5) - (4,7) Pairs 06: (1,7),(2,8),(3,5),(4,6) PairRound 6: GameRound 16: (1,7) - (2,8) | (3,5) - (4,6) GameRound 17: (1,7) - (4,6) | (2,8) - (3,5) GameRound 18: (1,7) - (3,5) | (2,8) - (4,6) Pairs 07: (1,8),(2,7),(3,6),(4,5) PairRound 8: GameRound 19: (1,8) - (2,7) | (3,6) - (4,5) GameRound 20: (1,8) - (4,5) | (2,7) - (3,6) GameRound 21: (1,8) - (3,6) | (2,7) - (4,5) </code></pre>