Event: Derby & District Cup QP

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Opponent Rating Result
David J Pickering 0 1 - 0
Derek A Jarvis 0 0 - 1
Martin Pettinger 0 0 - 1
Richard P Temple 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

0 = (0 + 400 * (2 - 2)) / 4)

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