Event: Hillingdon Div X

Opponent Rating Result
Mabel Forster-Tenny 909 1 - 0
Siddharth Sethi 1447 0 - 1
Jai Aggarwal 1199 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1052 = (3555 + 400 * (1 - 2)) / 3)

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