Event: Derby & District Division 1

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Opponent Rating Result
Michael J Alderson 1973 0 - 1
Neil Graham 1760 ½ - ½
David JF Woodhouse 1615 ½ - ½
D Martin Howard 1965 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1628 = (7313 + 400 * (0 - 2)) / 4)

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