Event: Durham City Club Championship

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Opponent Rating Result
Philip Brooks 0 1 - 0
Fedir Dyshliuk 0 1 - 0
Ken P Neat 0 1 - 0
Steve H Jefferies 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

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

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