Event: Division 3

Opponent Rating Result
George Mitchell 1491 ½ - ½
Edward Wolstenholme 1200 0 - 1
Patrick Eaton 1444 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1245 = (4135 + 400 * (0 - 1)) / 3)

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