Event: Summer Rapidplay

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Opponent Rating Result
Joe Vera-Sanso 0 1 - 0
Neil Sotheby 1180 1 - 0
Sagar Patil 1556 0 - 1
Phil Wales 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

684 = (2736 + 400 * (2 - 2)) / 4)

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