Event: LADDER

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Opponent Rating Result
Nicholas H Skinner 0 0 - 1
Marcus Whiting 0 1 - 0
Jon Young 0 0 - 1
David Bradley 0 ½ - ½
Peter Larwood 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-160 = (0 + 400 * (1 - 3)) / 5)

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