Event: Rapidplay

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Opponent Rating Result
Keith Homeyard 0 0 - 1
Chris Jones 0 0 - 1
Chris Jones 0 0 - 1
Keith Homeyard 0 0 - 1
Chris Jones 0 0 - 1
David Wallis 0 0 - 1
Keith Homeyard 0 0 - 1
Charlie Giles 0 0 - 1
Russell G Granat 0 0 - 1
Keith Homeyard 0 0 - 1
Paul W O'Brien 0 0 - 1
David Wallis 0 0 - 1
David Wallis 0 0 - 1
Chris Jones 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-400 = (0 + 400 * (0 - 14)) / 14)

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