Event: Derbyshire Individual

Opponent Rating Result
Shah Hussain 127 ½ - ½
Norman W Parkin 105 1 - 0
Alex Webster 163 0 - 1
Ray J Forey 169 0 - 1
David Williams 162 0 - 1
David JF Woodhouse 126 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-58 = (852 + 400 * (1 - 4)) / 6)

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