Event: Division 2

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Opponent Rating Result
David Lacey 1688 ½ - ½
Benjamin Lappin 1883 ½ - ½
Colin Cheek 1644 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1872 = (5215 + 400 * (1 - 0)) / 3)

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