Event: Examiner League

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Opponent Rating Result
Peter Czerwinski 1474 1 - 0
Graham White 1315 1 - 0
Kevin Bairstow 0 0 - 1
Peter G Moss 1597 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1297 = (4386 + 400 * (3 - 1)) / 4)

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