Event: Examiner League

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Opponent Rating Result
Amin Hossain 1537 0 - 1
Mark Bramall 1250 1 - 0
Andrew Batley 1482 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1290 = (4269 + 400 * (1 - 2)) / 3)

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