Event: All Play All

Opponent Rating Result
Barry Perchard 1469 0 - 1
Jonathan Boxall 0 0 - 1
Brian Stephenson 1443 0 - 1
Peter W Leask 1153 0 - 1
Patrick Dillon 1642 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

741 = (5707 + 400 * (0 - 5)) / 5)

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