Event: Division 2

Opponent Rating Result
Anthony R Meakin 1585 0 - 1
Peter M Collins 1735 ½ - ½
Joseph Wilcox 1510 0 - 1
Eddie Badger 1443 1 - 0
David Hulme 1840 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1543 = (8113 + 400 * (1 - 2)) / 5)

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