Event: Division 1 - Open

Opponent Rating Result
Chris M Collins 1938 1 - 0
Trefor F Thynne 1933 ½ - ½
Steven J Levy 2074 0 - 1
Chris M Collins 1938 0 - 1
Steven J Levy 2074 0 - 1
Trefor F Thynne 1933 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1848 = (11890 + 400 * (1 - 3)) / 6)

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