Event: SCL Div 1

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Opponent	Rating	Result
Roland Bezuidenhout	2355	½ - ½
Frazer Graham	0	0 - 1
Roland Bezuidenhout	0	0 - 1
Peter W Anderson	0	1 - 0
Spyridon Danopoulos	0	½ - ½
Peter W Anderson	2112	½ - ½
Raivan Huneewooth	0	½ - ½

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

581 = (4467 + 400 * (1 - 2)) / 7)