Event: Division 2

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Opponent	Rating	Result
Andrew Perella	1714	0 - 1
Stuart Skelsey	1820	0 - 1
Darren McCarthy	1691	1 - 0

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

1608 = (5225 + 400 * (1 - 2)) / 3)