Event: Online League Season 2, Division 2

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Opponent	Rating	Result
Andrew Birtwhistle	0	0 - 1
Dave Cook	1510	1 - 0
Stephen K Lee	1668	1 - 0
Sammy Benzaira	117	½ - ½
Robert G Taylor	1960	0 - 1
Geoff Frost	0	0 - 1
Marek Krajci	0	0 - 1

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

636 = (5255 + 400 * (2 - 4)) / 7)