Event: Eton Rapidplay 2019

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Opponent Rating Result
Sean Hunter 134 0 - 1
Helen Archer-Lock 123 1 - 0
Haotian Wu 178 0 - 1
Nandinee Thatte 114 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

37 = (549 + 400 * (1 - 2)) / 4)

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