Event: Examiner League

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Opponent Rating Result
Hamidreza Faham 1623 0 - 1
Leo A Keely 1928 ½ - ½
Dave Colledge 1726 1 - 0
John George 1793 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1668 = (7070 + 400 * (1 - 2)) / 4)

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