Event: Division 2

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Opponent Rating Result
James Fox 1825 0 - 1
Leon HJ Fincham 1844 1 - 0
Howard J Waterman 1906 ½ - ½
Biel Obiols 1618 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1698 = (7193 + 400 * (1 - 2)) / 4)

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