Event: Rockhammer Cup

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Opponent Rating Result
Gaston Franco 1890 0 - 1
Gaston Franco 1890 ½ - ½
Archie Flavell 1663 ½ - ½
Archie Flavell 1663 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1777 = (7106 + 400 * (1 - 1)) / 4)

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