Event: Durham City Club Tournament

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Opponent Rating Result
Mahmoud Shahbazi 2041 ½ - ½
George Gazis 1947 0 - 1
Ken P Neat 2169 0 - 1
Fedir Dyshliuk 1815 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1693 = (7972 + 400 * (0 - 3)) / 4)

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