Event: Derby & District Division 3

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Opponent Rating Result
Michael D Boreham 1523 0 - 1
Alan Kennedy 1662 0 - 1
Richard M Farmery 0 1 - 0
Andy Bacon 1404 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1147 = (4589 + 400 * (2 - 2)) / 4)

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