Event: Richard Furness(500) League

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Opponent Rating Result
Charles Metcalfe 1653 ½ - ½
Anthony O'Donnell 1000 1 - 0
Alfie Dillon 1300 1 - 0
Alex Robinson 1600 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1488 = (5553 + 400 * (2 - 1)) / 4)

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