Event: Division 1

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Opponent	Rating	Result
Simon Wilks	2195	1 - 0
John J Cox	2330	0 - 1
Toni Johansson	2063	0 - 1

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

2063 = (6588 + 400 * (1 - 2)) / 3)