Event: 6 Board League

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Opponent Rating Result
Richard Porter 1889 ½ - ½
Richard Porter 1899 1 - 0
Robert A Dean 1867 1 - 0
Dave Patrick 1868 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2081 = (7523 + 400 * (2 - 0)) / 4)

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