Event: South Cheshire Shield

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Opponent Rating Result
David S Johnson 1587 1 - 0
Ken Elinor 1000 1 - 0
Tim Twentyman 1688 1 - 0
Evan Clark 1704 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1895 = (5979 + 400 * (4 - 0)) / 4)

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