Event: Div 2 - Weston Trophy

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Opponent Rating Result
Peter Cooper 1629 0 - 1
Ken Hunter 1765 0 - 1
John R Mercy 1800 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1331 = (5194 + 400 * (0 - 3)) / 3)

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