Event: The Friendly League

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Opponent Rating Result
Clive Edwards 0 ½ - ½
Kevin Miller 0 0 - 1
Andrew Hargreaves 1792 0 - 1
Yousaf Ahmed 0 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

148 = (1792 + 400 * (0 - 3)) / 4)

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