Event: Division 2

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Opponent Rating Result
David McKee 1567 1 - 0
Joshua Gibbs 1510 ½ - ½
David snr Stanfield 1652 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1843 = (4729 + 400 * (2 - 0)) / 3)

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