Event: North London League

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Opponent Rating Result
Jacob Rose 0 0 - 1
Eliya Istari 1293 0 - 1
Avril Chloe Hsu 1458 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

517 = (2751 + 400 * (0 - 3)) / 3)

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