Event: Division 2

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Opponent Rating Result
D Philip Morgan 1734 ½ - ½
Alan R Griffiths 1878 1 - 0
Tim R Poole 1783 1 - 0
Mike Herbert 1673 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1967 = (7068 + 400 * (2 - 0)) / 4)

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