Event: Division B

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Opponent Rating Result
John Cox 1521 ½ - ½
Jonathon Parton 1450 0 - 1
Matthew Singer 1450 1 - 0
John Regan 1510 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1483 = (5931 + 400 * (1 - 1)) / 4)

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