Event: South Cheshire Shield

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Opponent Rating Result
Brian Wagstaff 100 0 - 1
Nigel Gardner 90 0 - 1
Richard Hind 90 ½ - ½
Amy Lovatt 90 0 - 1
Simon Layhe 117 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-143 = (487 + 400 * (0 - 3)) / 5)

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