Event: Div 2 - Weston Trophy

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Opponent Rating Result
Alan S McIntosh 1840 0 - 1
Tim Humphries 1850 1 - 0
Ivan Dunnachie 1857 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1716 = (5547 + 400 * (1 - 2)) / 3)

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