Event: D&DCL Div 1

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Opponent	Rating	Result
Esteve Mateu Guiu	195	0 - 1
Ian S Kingston	174	½ - ½
Andrew Robins	139	½ - ½
Kenneth GE Morrison	174	½ - ½
D Martin Howard	177	0 - 1
Simon R Edwards	173	½ - ½
Anthony J Green	169	½ - ½
Andrew Robins	139	1 - 0
Andrew Stevens	154	0 - 1
Steven J Burke	166	½ - ½
D Martin Howard	177	0 - 1

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

58 = (1837 + 400 * (1 - 4)) / 11)