Event: LADDER

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Opponent Rating Result
Paul W O'Brien 0 0 - 1
Mark Cox 0 1 - 0
Philip Crompton 0 1 - 0
Marcus Whiting 0 0 - 1
Keith Guinness 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-80 = (0 + 400 * (2 - 3)) / 5)

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