Event: SCL Div 3

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Opponent	Rating	Result
Simon Lawrence	1563	0 - 1
Eric M Jones	1760	1 - 0
John B Symons	1704	½ - ½

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

1676 = (5027 + 400 * (1 - 1)) / 3)