Event: 4-Board Division 2

Opponent Rating Result
Andrew D Bettley 153 0 - 1
Stephen Greep 137 0 - 1
Bryan Hesler 142 1 - 0
David Stothard 143 0 - 1
Graham Lee 117 0 - 1
Peter Morgan 49 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-10 = (741 + 400 * (2 - 4)) / 6)

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