Event: League

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Opponent Rating Result
Jason Dew 126 1 - 0
Joanne Hutchinson 147 1 - 0
Rod S Wardlaw 137 0 - 1
Bernard Pratten 144 ½ - ½
Jason Dew 126 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

216 = (680 + 400 * (2 - 1)) / 5)

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