Event: LADDER

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Opponent Rating Result
Mark Cox 1086 1 - 0
David Wallis 1607 1 - 0
Mark Cox 1071 1 - 0
David Bradley 1368 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1683 = (5132 + 400 * (4 - 0)) / 4)

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