Event: Division 2

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Opponent Rating Result
Tom Last 0 0 - 1
William Waldron 966 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

483 = (966 + 400 * (1 - 1)) / 2)

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Opponent Rating Result
Matt Howells 1428 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1028 = (1428 + 400 * (0 - 1)) / 1)