Event: League Division 2

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Opponent	Rating	Result
Lee Crawford	1853	1 - 0
John Grasham	1631	0 - 1
Matthew Langdon	1424	1 - 0

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

1769 = (4908 + 400 * (2 - 1)) / 3)