Event: Division 1

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Opponent Rating Result
David Wells 150 0 - 1
Ewen Miller 127 ½ - ½
Paul W Anderson 145 0 - 1
Jonathan R Ayres 139 1 - 0
Simon Dixon 136 1 - 0
Eric A Key 150 0 - 1
M John Cawston 155 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

86 = (1002 + 400 * (2 - 3)) / 7)

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