Event: Division 2

Opponent Rating Result
Andrew N Salmon 1829 0 - 1
James Harrison 1581 1 - 0
Muhammad Faheem 1620 0 - 1
Grace Wilde 1618 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1462 = (6648 + 400 * (1 - 3)) / 4)

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