Event: Atkinson Cup

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Opponent Rating Result
Stephen Greep 1698 1 - 0
Andrew D Bettley 1855 1 - 0
David J Gibson 1533 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2095 = (5086 + 400 * (3 - 0)) / 3)

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