Event: Richard Furness League

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Opponent Rating Result
Peter Morgan 1409 1 - 0
Anthony Oldham 1489 ½ - ½
Stephen Deakin 1445 1 - 0
Mark Jones 1369 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1628 = (5712 + 400 * (2 - 0)) / 4)

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