Event: South Cheshire Shield

Opponent Rating Result
Amy Lovatt 144 ½ - ½
Joe Hirst 93 0 - 1
John HM Smith 90 ½ - ½
Andrew Barker 110 ½ - ½
Neville Layhe 137 0 - 1
Joe Hirst 93 1 - 0
Amy Lovatt 115 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-3 = (782 + 400 * (1 - 3)) / 7)

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