Event: Ivan Gromov Online Schools Chess League

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Opponent Rating Result
David Liu 0 0 - 1
Y Ben Chang 1259 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

630 = (1259 + 400 * (1 - 1)) / 2)

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Opponent Rating Result
Isaac Lam 1474 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1074 = (1474 + 400 * (0 - 1)) / 1)