Event: B&DCL Div 3

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Opponent	Rating	Result
Jean Louis Marchand	1750	1 - 0
Paul A Jackson	1698	0 - 1
T Alan Wykes	1570	0 - 1
John R Bowley	1596	1 - 0
Malcolm Day	1640	0 - 1
Zander Booth	1727	½ - ½
Robert M Willington	1606	½ - ½
Mike Rutter	1673	0 - 1

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

1558 = (13260 + 400 * (2 - 4)) / 8)