Event: Division 2

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Opponent Rating Result
Nathan Weersing 1536 0 - 1
Amy John 1584 1 - 0
David Cattermole 1644 ½ - ½
Mike Angel 1414 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1645 = (6178 + 400 * (2 - 1)) / 4)

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