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Event: WMA Spring League Division 1

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Opponent Rating Result
Peter E Chaplin 1912 0 - 1
Matthew Coldwell 1681 1 - 0
Peter E Chaplin 1912 0 - 1
Matthew Coldwell 1681 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1597 = (7186 + 400 * (1 - 3)) / 4)

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