Event: South Cheshire Shield

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Opponent Rating Result
Jon EW Blackburn 1698 0 - 1
Harry Gardiner 1886 0 - 1
Julian P Cook 1347 0 - 1
David J Stuart 1586 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1429 = (6517 + 400 * (1 - 3)) / 4)

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