Event: NSDCA Division 2

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Opponent	Rating	Result
Roger VH Butters	1665	½ - ½
Michael A Lee	1687	½ - ½
Alberto Gissi	1653	0 - 1
Sean Tavener	1760	1 - 0
Lee Spackman	1531	1 - 0
Roger W Walker	1588	1 - 0
Jay Swann	0	1 - 0
Glen Clouds	1626	1 - 0

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

1639 = (11510 + 400 * (5 - 1)) / 8)