Event: Division 4

Opponent Rating Result
Joe Hirst 127 0 - 1
Hambel M Willow 133 1 - 0
David S Johnson 113 0 - 1
Kenneth J McNulty 129 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

26 = (502 + 400 * (1 - 2)) / 4)

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