Event: Examiner League

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Opponent Rating Result
Bryn W Charlesworth 1538 0 - 1
Philip Bates 0 ½ - ½
John G Taylor 1482 1 - 0
Ben Robinson 1365 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1196 = (4385 + 400 * (2 - 1)) / 4)

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