Event: SCCU County Championship: u1850

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Opponent	Rating	Result
Jonathan Kay	1842	0 - 1
Stephen W Berkley	1779	½ - ½
Tony B Packham	1817	1 - 0

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

1813 = (5438 + 400 * (1 - 1)) / 3)