Event: U1650R summer league

Opponent Rating Result
Huw D Jacob 1389 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

989 = (1389 + 400 * (0 - 1)) / 1)

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Opponent Rating Result
Ivan Hutcheson 1421 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1021 = (1421 + 400 * (0 - 1)) / 1)