Event: Hammersmith Rockhammer Cup

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Opponent Rating Result
Andreas Antoniades 1580 0 - 1
Anastasija Royce 1503 0 - 1
Robert Ferguson 1249 1 - 0
Robert Ferguson 1249 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1195 = (5581 + 400 * (1 - 3)) / 4)

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