Event: Major

Opponent Rating Result
George Cooper 1753 1 - 0
Ninghongshen Xu 462 1 - 0
Arnob Dutta 462 1 - 0
Robert D Hull 1693 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1393 = (4370 + 400 * (3 - 0)) / 4)

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