Event: SCCA Division 2 19/20

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Opponent Rating Result
David Robertson 99 1 - 0
Dave Johnson 0 1 - 0
Judith Heffer 147 0 - 1
David P Green 116 0 - 1
Laurie Pott 144 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

21 = (506 + 400 * (2 - 3)) / 5)

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