Event: South Cheshire Shield

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Opponent Rating Result
Amy Lovatt 144 1 - 0
Andrew T Leadbetter 117 1 - 0
Adam Fields 90 1 - 0
Michael D Williams 90 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

510 = (441 + 400 * (4 - 0)) / 4)

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