Event: League Division 3

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Opponent Rating Result
Andy Baker 1321 1 - 0
Stephen Burton 1340 0 - 1
David Callaghan 1113 0 - 1
Tomas Hamilton 1494 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1117 = (5268 + 400 * (1 - 3)) / 4)

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