Event: Div1

Opponent Rating Result
Simon R Edwards 178 0 - 1
Daniel JS Sullivan 188 0 - 1
Jonah B Willow 218 0 - 1
Ray J Forey 177 ½ - ½
Simon N Gilmore 188 0 - 1
Derek A Jarvis 178 0 - 1
D Martin Howard 175 ½ - ½
John Bamford 0 ½ - ½
David Williams 159 0 - 1
Shane Bhayat 162 ½ - ½
Peter JE Ackley 189 0 - 1
Ranjit Nath 155 0 - 1
Michael D Johnson 169 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-113 = (2136 + 400 * (0 - 9)) / 13)

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