Event: Bob Burns 2019

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Opponent Rating Result
Mike A Walker 165 0 - 1
Simon Jones 72 1 - 0
Fazal Rabbi 144 ½ - ½
Paul G Day 153 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

34 = (534 + 400 * (1 - 2)) / 4)

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