Event: Summer League Division 4

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Opponent Rating Result
Matthew Aitken 0 0 - 1
Peter T Sharpe 1705 0 - 1
Paul Wheatley 1813 0 - 1
James Alex Brown 0 0 - 1
Alex Thorp 1485 1 - 0
Michael W Simmons 1159 1 - 0
John HT Eddershaw 1370 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

905 = (7532 + 400 * (2 - 5)) / 7)

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