Event: Division 3 West

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Opponent	Rating	Result
Mareks Ogars	0	½ - ½
Rupert Sells	0	1 - 0
Vanessa Delbo	1568	1 - 0

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

789 = (1568 + 400 * (2 - 0)) / 3)