Event: Division 2

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Opponent Rating Result
Richard Garrett 2023 0 - 1
Colin J Davis 2015 0 - 1
Matthew DJ Wilson 1929 1 - 0
Alastair JD Marston 1690 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1714 = (7657 + 400 * (1 - 3)) / 4)

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