Event: U1650 Cup

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Opponent Rating Result
Piotr Dolewka 1510 0 - 1
Mark Webb 1400 ½ - ½
Ken Lunn 1503 1 - 0
Marek Ciorga 1615 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1407 = (6028 + 400 * (1 - 2)) / 4)

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