Event: Open

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Opponent	Rating	Result
Fred S Dickson	135	0 - 1
Praveen Joy	135	½ - ½
Robert Marks	144	1 - 0
Jon Turner	153	1 - 0
Fred S Dickson	135	0 - 1
Praveen Joy	135	1 - 0
Robert Marks	144	0 - 1
Jon Turner	153	1 - 0

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

192 = (1134 + 400 * (4 - 3)) / 8)