Event: SCL Div 2

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Opponent	Rating	Result
Michael J White	1627	½ - ½
Martin L Newbury	1916	½ - ½
Graham Stuart	1761	0 - 1
Jack Wicken	1790	½ - ½
S Cartridge	1759	½ - ½
Daniel Pugh	1573	0 - 1
Dave J Elliott	1687	1 - 0

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

1673 = (12113 + 400 * (1 - 2)) / 7)