Event: Mini League

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Opponent Rating Result
Kenneth L Marsden 1391 0 - 1
David Halpin 1173 0 - 1
Lawrence Caldicott 1263 0 - 1
Nigel Stansbie 1450 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

919 = (5277 + 400 * (0 - 4)) / 4)

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