Event: Division 1 - Open

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Opponent	Rating	Result
Mark Furnevall	1909	0 - 1
Jack Wills	1676	0 - 1
Trefor F Thynne	1896	0 - 1

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

1427 = (5481 + 400 * (0 - 3)) / 3)