Event: Derby & District Plate QP

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Opponent Rating Result
Dean Davis 0 1 - 0
J Martin Gibson 0 1 - 0
Peter Rose 0 0 - 1
Brian Crofts 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

200 = (0 + 400 * (3 - 1)) / 4)

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