Event: SCCU County Championship: u2050

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Opponent	Rating	Result
David E Clear	1958	½ - ½
B Peter A Andrews	2017	0 - 1
D Ian Calvert	2026	½ - ½

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

1867 = (6001 + 400 * (0 - 1)) / 3)