Event: Division 2

Opponent Rating Result
Peter A Gemmell 2076 0 - 1
Sam Harrison 1684 ½ - ½
Jerry Bowman 1656 ½ - ½
Armando Galletti 1700 1 - 0
Simon Riley 1708 ½ - ½
James Irwin 1817 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1774 = (10641 + 400 * (1 - 1)) / 6)

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