Event: Division 2

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Opponent Rating Result
David I Tipper 1779 1 - 0
Jerry Humphreys 2034 1 - 0
Andrew N Chapman 1841 1 - 0
Richard Batey 1941 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2299 = (7595 + 400 * (4 - 0)) / 4)

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