Event: January Rapidplay

Opponent Rating Result
Alan Welsh 1785 1 - 0
Jose Grueso 1698 1 - 0
Dennis Patterson 1390 1 - 0
James Turner 1924 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1899 = (6797 + 400 * (3 - 1)) / 4)

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