Event: SCCA Division 3 19/20

Opponent Rating Result
Roger N Smith 86 0 - 1
Alan Story 74 ½ - ½
Raf Calumpiano 63 1 - 0
Roger N Smith 86 ½ - ½
Geoff Lilley 41 0 - 1
Craig Bradshaw 74 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-63 = (424 + 400 * (1 - 3)) / 6)

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