Event: B&DCL Div 2

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Opponent	Rating	Result
Lindsay P Aris	1782	1 - 0
Tim Jones	1824	½ - ½
Dennis Stokes-Carter	1856	0 - 1
Lindsay P Aris	1782	0 - 1
John Belinger	1639	½ - ½
Robert Halse	1800	1 - 0
John E Harris	1578	1 - 0

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

1809 = (12261 + 400 * (3 - 2)) / 7)