Event: Cambs Division 2

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Opponent	Rating	Result
John D Wright	1559	0 - 1
John D Wright	1559	0 - 1
Chris J Russell	1598	0 - 1
Jim Jennings	1389	1 - 0
Tom O'Keefe	1302	1 - 0
Jimmy Blair	1510	0 - 1
Peter C Wells	1475	½ - ½
Peter C Wells	1475	0 - 1

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

1333 = (11867 + 400 * (2 - 5)) / 8)