Event: Examiner League

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Opponent Rating Result
Andrew Batley 1529 0 - 1
Eric Walker 0 1 - 0
Mark Rojinsky 1464 0 - 1
Bryn W Charlesworth 1529 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

931 = (4522 + 400 * (1 - 3)) / 4)

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