Event: Northwich Ladder

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Opponent	Rating	Result
Ingmar So	1170	0 - 1
Jake Sullivan	1643	1 - 0
Noah Reeves	1340	0 - 1

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

1251 = (4153 + 400 * (1 - 2)) / 3)