Event: Watkinsons League

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Opponent Rating Result
Leo A Keely 1928 0 - 1
Alex Burke 1975 0 - 1
Michael I Connor 1746 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1750 = (5649 + 400 * (1 - 2)) / 3)

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