Event: League Division 3

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Opponent Rating Result
David Summerland 1487 1 - 0
David Halpin 1201 1 - 0
Jim R Postill 1410 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1766 = (4098 + 400 * (3 - 0)) / 3)

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