Event: Division 3

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Opponent Rating Result
John R Huthwaite 1743 1 - 0
Grenville Wollerton 1737 ½ - ½
Mike Herbert 1719 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1866 = (5199 + 400 * (1 - 0)) / 3)

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