Event: Division 2

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Opponent Rating Result
Alan PH Norman 1731 1 - 0
Oliver Ferris 1667 0 - 1
Richard H Newman 1715 ½ - ½
Chris Braithwaite 1678 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1798 = (6791 + 400 * (2 - 1)) / 4)

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