Event: Richard Furness(500) League

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Opponent	Rating	Result
Charles Metcalfe	1653	0 - 1
Luke Thomson	1650	1 - 0
Ilya Dubov	1700	0 - 1

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

1534 = (5003 + 400 * (1 - 2)) / 3)