Event: Division 1 - Open

Opponent Rating Result
Mark Furnevall 1906 0 - 1
Piotr Ruszelak 1784 1 - 0
Brooklyn Stephens 1734 ½ - ½
Ben R Wilkinson 1725 1 - 0
Catherine Black 1711 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1772 = (8860 + 400 * (2 - 2)) / 5)

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