Event: Spring OTB Division 3

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Opponent	Rating	Result
Robin IR Wilding	1812	0 - 1
Conor Hicks	1508	1 - 0
Ben Williamson	1350	1 - 0

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

1690 = (4670 + 400 * (2 - 1)) / 3)