Event: Division 2

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Opponent	Rating	Result
Max Nyberg	1931	0 - 1
Steven JL Rix	1980	0 - 1
Robert C Stern	1958	1 - 0

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

1823 = (5869 + 400 * (1 - 2)) / 3)