Event: Division 3

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Opponent	Rating	Result
Zack Norris	1880	0 - 1
Simon Gathern	1629	½ - ½
River Barley	0	1 - 0

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

1170 = (3509 + 400 * (1 - 1)) / 3)