Event: Rapidplay

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Opponent Rating Result
Charlie Giles 0 0 - 1
Keith Homeyard 0 0 - 1
David Bradley 0 ½ - ½
David Wallis 0 0 - 1
David Wallis 0 0 - 1
David Bradley 0 1 - 0
Mark Cox 0 1 - 0
David Wallis 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-150 = (0 + 400 * (2 - 5)) / 8)

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