Event: B&DCL Div 2

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Opponent	Rating	Result
Diaz Alejandro Alvardo	228	0 - 1
Michael Jackson	155	½ - ½
Martin J Clancy	164	1 - 0
Martin J Clancy	164	½ - ½
Michael Jackson	155	1 - 0
Diaz Alejandro Alvardo	228	0 - 1
Phil Sorensen	137	½ - ½
Reenen J Du Toit	166	1 - 0

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

225 = (1397 + 400 * (3 - 2)) / 8)