Event: League Division 3

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Opponent Rating Result
Robert Dennington 1640 ½ - ½
RA (Bob) Maltby 1640 ½ - ½
Nathaniel Mackenzie 1322 1 - 0
James A Sidley 1554 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1639 = (6156 + 400 * (1 - 0)) / 4)

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