Event: Division 1

Opponent Rating Result
Alex B Combie 1785 0 - 1
John T Swain 2009 ½ - ½
John R Huthwaite 1731 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1842 = (5525 + 400 * (1 - 1)) / 3)

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