Event: Grand Prix

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Opponent Rating Result
Tim Valentine 1485 0 - 1
Stephen T Welch 0 0 - 1
Karina Kowalczyk 1424 ½ - ½
Bathuman Madavan 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

427 = (2909 + 400 * (0 - 3)) / 4)

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