Event: Derby & District Division 3

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Opponent Rating Result
Michael O'Brien 1352 0 - 1
Malcolm Newsam 0 0 - 1
Mohinderpal Samra 1385 1 - 0
George Moorcroft 1302 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

810 = (4039 + 400 * (1 - 3)) / 4)

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