Event: Division 1 - Open

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Opponent	Rating	Result
Jack Wills	1676	0 - 1
Charles V Howard	1834	0 - 1
Toby Hocking	1687	1 - 0

performance = (sum(opponents ratings) + 400(wins-losses)) / games

1599 = (5197 + 400 * (1 - 2)) / 3)