Event: Mini League

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Opponent Rating Result
Lackson Mzizi 1900 0 - 1
John Grasham 1711 0 - 1
Paul Howden 1789 0 - 1
Clive W Davies 1860 0 - 1
Matt Jones 1726 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1557 = (8986 + 400 * (1 - 4)) / 5)

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