Event: Eastman Cup

Opponent Rating Result
Rory MR O'Kelly 2010 ½ - ½
Adam Fysh-Foskett 2333 ½ - ½
Robin Sarfas 1795 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2179 = (6138 + 400 * (1 - 0)) / 3)

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