Event: South Cheshire Shield

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Opponent Rating Result
Amy Lovatt 90 0 - 1
Richard P Cantliff 125 0 - 1
Amy Lovatt 144 0 - 1
Andrew Mowat 117 1 - 0
John R Day 129 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-39 = (605 + 400 * (1 - 3)) / 5)

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