Event: Division 1 Rapidplay Cup

Opponent Rating Result
Laurie Pott 1809 0 - 1
Laurie Pott 1809 ½ - ½
Ed Kirkham 1708 0 - 1
Ed Kirkham 1708 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1659 = (7034 + 400 * (1 - 2)) / 4)

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