Event: Division 2

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Opponent Rating Result
Daniel Donaghy 0 0 - 1
Oliver Martin 0 1 - 0
Michael R Elgin 1488 ½ - ½
Steve Merchant 1545 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

858 = (3033 + 400 * (2 - 1)) / 4)

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