Event: Derby & District Division 3

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Opponent Rating Result
Dean M Hartley 1852 0 - 1
Stuart Marshall 1709 ½ - ½
David Hall 1728 1 - 0
Graham J Pace 1513 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1801 = (6802 + 400 * (2 - 1)) / 4)

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