Event: MH Brown Summer League Section 1

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Opponent	Rating	Result
Mark I Collinson	1961	0 - 1
Stephen Crow	1876	0 - 1
Phil Bawden	1743	1 - 0

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

1727 = (5580 + 400 * (1 - 2)) / 3)