Event: Division 1 - Open

Opponent Rating Result
Steven J Levy 2074 0 - 1
Steven J Levy 2074 0 - 1
George A Darling 1912 0 - 1
Piotr Ruszelak 1784 0 - 1
Paul Brooks 1855 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1620 = (9699 + 400 * (0 - 4)) / 5)

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