Event: SCCA Division 1 19/20

Opponent Rating Result
Angus Irving 136 0 - 1
Jim Buis 155 ½ - ½
H Roger Holt 145 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

12 = (436 + 400 * (0 - 1)) / 3)

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