Event: Examiner League

Opponent Rating Result
Granville Boot 1809 0 - 1
David Booth 1768 0 - 1
Andrew Batley 1534 0 - 1
Hamidreza Faham 1599 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1478 = (6710 + 400 * (1 - 3)) / 4)

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