Event: Richard Furness League

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Opponent	Rating	Result
Ethan Norris	2075	0 - 1
Peter Morgan	1376	1 - 0
Jonathan Miller	1608	0 - 1

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

1553 = (5059 + 400 * (1 - 2)) / 3)