Event: OTB RuleOf6-15Sep-A

Opponent Rating Result
Inder-Veer Singh 137 1 - 0
Terry D Whitton 170 ½ - ½
Philip Staniland 157 0 - 1
Mark RA Murrell 168 0 - 1
Peter A Nickals 138 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-6 = (770 + 400 * (1 - 3)) / 5)

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