Event: Derby & District Division 2

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Opponent Rating Result
David J Pickering 1723 ½ - ½
G Burdell 1811 0 - 1
Kevin J Gallagher 1649 0 - 1
Michael WA Hoare 1664 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1612 = (6847 + 400 * (1 - 2)) / 4)

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