Event: Challengers

Opponent Rating Result
Sangeetha Gowda 0 1 - 0
Alex Halstead 0 ½ - ½
Yury Krylov 1594 1 - 0
Martin Ginestie 1792 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

947 = (3386 + 400 * (2 - 1)) / 4)

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