Event: September Quickplay

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Opponent Rating Result
Manuel Lopez 1373 0 - 1
Malcolm Goldspink 1260 1 - 0
Iain Mellis 1645 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1293 = (4278 + 400 * (1 - 2)) / 3)

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