Event: OTB RuleOf6-15Sep-A

Opponent Rating Result
David Smith 136 0 - 1
Philip Staniland 157 0 - 1
Mark RA Murrell 168 0 - 1
Peter A Nickals 138 0 - 1
Terry D Whitton 170 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-86 = (769 + 400 * (1 - 4)) / 5)

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