Event: Division 2

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Opponent Rating Result
Bertie Leatham 0 1 - 0
P, Philip Roe 1428 0 - 1
Lisa Jelley 1338 0 - 1
Jack Pye 0 0 - 1
Roger R Pearson 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

313 = (2766 + 400 * (1 - 4)) / 5)

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