Event: Open

Opponent Rating Result
Phil Bull 1889 0 - 1
Mircea-Marius Mesesan 1990 0 - 1
Phil Bull 1889 1 - 0
Golam S Ali 1942 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1728 = (7710 + 400 * (1 - 3)) / 4)

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