Event: Summer League Section 1

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Opponent Rating Result
David J Hambly 1813 1 - 0
Mark I Collinson 2073 1 - 0
Stephen Crow 1840 0 - 1
Edward S Oxley 1761 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2072 = (7487 + 400 * (3 - 1)) / 4)

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