Event: Rapidplay

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Opponent Rating Result
Paul A O'Neill 175 0 - 1
Paul DJ Hampton 189 0 - 1
Paul DJ Hampton 189 0 - 1
Paul A O'Neill 175 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-18 = (728 + 400 * (1 - 3)) / 4)

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