Event: IM Brown

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Opponent	Rating	Result
David Halpin	1178	1 - 0
Alec Ward	1728	0 - 1
Ben Moran	1489	½ - ½

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

1465 = (4395 + 400 * (1 - 1)) / 3)