Event: SCCU County Championship: u1650

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Opponent	Rating	Result
Sean Horan	1537	1 - 0
James F McKenna	1593	0 - 1
David J Gilbert	1556	0 - 1
Ray Chu	1503	½ - ½

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

1447 = (6189 + 400 * (1 - 2)) / 4)