Event: Rapid Play League

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Opponent Rating Result
John Hall 1879 ½ - ½
John Hall 1879 ½ - ½
Jack Booker 1838 1 - 0
Jack Booker 1838 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2059 = (7434 + 400 * (2 - 0)) / 4)

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