Event: Hammersmith Sledgehammer Cup

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Opponent Rating Result
Jon Mather 1567 0 - 1
Jake Stones 1834 0 - 1
Paul van Kan 0 ½ - ½
Alejandro Albiol 1266 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1067 = (4667 + 400 * (1 - 2)) / 4)

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