Event: 1st Potluck Invitational

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Opponent	Rating	Result
Karina Kowalczyk	1507	1 - 0
Marija Samuchova	1900	1 - 0

performance = (sum(opponents ratings) + 400(wins-losses)) / games

2104 = (3407 + 400 * (2 - 0)) / 2)