Event: Division 1

Opponent Rating Result
John T Swain 2009 ½ - ½
Alex B Combie 1785 0 - 1
John R Huthwaite 1731 1 - 0
R Andrew Hebert 1878 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1751 = (7403 + 400 * (1 - 2)) / 4)

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