Event: Examiner League

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Opponent Rating Result
David Robinson 1853 1 - 0
Mohammed Rohman 1561 ½ - ½
David Firth 1433 1 - 0
Granville Boot 1787 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1859 = (6634 + 400 * (2 - 0)) / 4)

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