Event: Eton Rapidplay 2019

Opponent Rating Result
Ben Barton 111 0 - 1
Benjamin Pickwick 102 0 - 1
Robert Van der Vgrer 0 0 - 1
Harry Proffitt 0 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

-147 = (213 + 400 * (1 - 3)) / 4)

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