Event: Division 2

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Opponent Rating Result
William F Tracey 1565 1 - 0
Daniel Donaghy 0 0 - 1
Peter Orme 0 0 - 1
Ben Hermanns 1249 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

504 = (2814 + 400 * (1 - 3)) / 4)

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