Event: John Newsome Cup: 1200 to 1500

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Opponent	Rating	Result
Sam Hough	1123	0 - 1
Jonathan Hancock	0	0 - 1
Rory Neil	1247	0 - 1

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

390 = (2370 + 400 * (0 - 3)) / 3)