Event: Open

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Opponent Rating Result
Derek Backhouse 1758 1 - 0
Mike J Hollier 1735 1 - 0
Derek Backhouse 1758 1 - 0
Mike J Hollier 1735 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2147 = (6986 + 400 * (4 - 0)) / 4)

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