Event: Rated Friendlies

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Opponent Rating Result
Chris M Cox 1594 ½ - ½
Chris M Cox 1595 1 - 0
Alex D Pready 1784 ½ - ½
Craig Cowley 0 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1343 = (4973 + 400 * (1 - 0)) / 4)

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