Event: Division 1 - Open

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Opponent	Rating	Result
Doug Morton	1872	1 - 0
Mark V Abbott	1897	0 - 1
Freddie Sugden	1671	1 - 0

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

1947 = (5440 + 400 * (2 - 1)) / 3)