Event: Open-Rapid-play

Opponent Rating Result
Patrick CM Duncan 2170 0 - 1
Henrik Stepanyan 2314 1 - 0
Patrick CM Duncan 2170 1 - 0
Henrik Stepanyan 2314 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2242 = (8968 + 400 * (2 - 2)) / 4)

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