Event: Division A

Opponent Rating Result
Andrew Crowther 1689 1 - 0
Hambel M Willow 1784 0 - 1
Tony Byrne 1487 1 - 0
Graham J Ashcroft 1866 0 - 1
Robert Grounds 1319 1 - 0
Robert Grounds 1319 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1711 = (9464 + 400 * (4 - 2)) / 6)

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