Event: U1650 Cup

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Opponent Rating Result
Daniel Such 1597 ½ - ½
David Robertson 1396 ½ - ½
Piotr Dolewka 1591 1 - 0
Oliver Ferris 1625 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1552 = (6209 + 400 * (1 - 1)) / 4)

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