Event: Examiner League

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Opponent Rating Result
Hamidreza Faham 1585 1 - 0
Colin Dixon 0 1 - 0
John G Taylor 1494 1 - 0
Andrew Batley 1543 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1556 = (4622 + 400 * (4 - 0)) / 4)

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