Event: Cambs Division 1

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Opponent	Rating	Result
Neal Fisher	1712	½ - ½
Peter Baddeley	1533	0 - 1
Neil Greenwood	1788	½ - ½
Edward Knox	1683	1 - 0
Jimmy Blair	1413	1 - 0
Jim Jennings	0	1 - 0
Richard HK Mann	1848	1 - 0

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

1597 = (9977 + 400 * (4 - 1)) / 7)