Event: ECF club

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Opponent Rating Result
Vishruth Prabhuram 0 0 - 1
Raymond Karthikeyan 0 0 - 1
Dev Patel 0 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-267 = (0 + 400 * (0 - 2)) / 3)

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