Event: B&DCL Div 3

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Opponent	Rating	Result
Alan J Tyler	1601	0 - 1
Tony Ackerman	1512	1 - 0
Andrew Manson	1683	1 - 0
Stefan Matthews	1600	1 - 0
Malcolm Day	1640	0 - 1
John R Bowley	1596	½ - ½
Lindsay P Aris	1700	0 - 1
Robert Davenport	1632	0 - 1

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

1571 = (12964 + 400 * (3 - 4)) / 8)