Event: U1850

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Opponent	Rating	Result
Phil Ramsey	1753	½ - ½
Ian W Mackay	1714	1 - 0
Michael I Connor	1787	1 - 0

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

2018 = (5254 + 400 * (2 - 0)) / 3)