Event: Division 2

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Opponent Rating Result
Martin Beardsley 1710 1 - 0
Dave Patterson 1739 1 - 0
Alan Welsh 1770 0 - 1
Andrew Robinson 1784 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1751 = (7003 + 400 * (2 - 2)) / 4)

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