Event: C Division

Opponent Rating Result
David Pizzi 1456 0 - 1
Alexandros Kalyviotis 1643 ½ - ½
Robert Donner 1672 1 - 0
Tom Brough 1480 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1663 = (6251 + 400 * (2 - 1)) / 4)

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