Event: Division 3

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Opponent Rating Result
John R Huthwaite 1743 0 - 1
Robert H Willoughby 1634 ½ - ½
Philip Erentz 1563 1 - 0
Malcolm Jackson 1448 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1697 = (6388 + 400 * (2 - 1)) / 4)

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