Event: Division 2

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Opponent Rating Result
Richard Collis 1517 1 - 0
Michael W Minshall 1486 1 - 0
Thomas Ash 1686 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1696 = (4689 + 400 * (2 - 1)) / 3)

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