Event: Division 2

Opponent Rating Result
Glyn D Valentine 145 ½ - ½
Michael A Lee 135 ½ - ½
David I Hulme 135 0 - 1
Michael A Lee 135 0 - 1
Anthony RW Brough 138 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-102 = (688 + 400 * (0 - 3)) / 5)

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