Event: Division 4

Opponent Rating Result
Michael Moura 1785 0 - 1
Malcolm H Cooper 1821 ½ - ½
Edward Hargreaves 1668 1 - 0
Michael Moura 1785 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1665 = (7059 + 400 * (1 - 2)) / 4)

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