Event: Southport Summer Competition 2024

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Opponent	Rating	Result
Nathan Duffy	1454	1 - 0
John J Grady	1634	1 - 0
Iain Smith	1582	1 - 0
James Foy	1764	½ - ½
Geoffrey W Sage	1880	0 - 1
Chris Kaye	1681	1 - 0
Harry Baybutt-Thompson	1565	1 - 0

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

1880 = (11560 + 400 * (5 - 1)) / 7)