Event: SCCU County Championship: u1850

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Opponent	Rating	Result
Andrew Boughen	1823	0 - 1
James Fox	1778	1 - 0
Ian K Cross	1795	½ - ½

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

1799 = (5396 + 400 * (1 - 1)) / 3)