Event: D&DCL Div 3

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Opponent	Rating	Result
George Moorcroft	1249	0 - 1
Tony O'Donovan	0	0 - 1
Benjamin Lester	0	0 - 1
Tony O'Donovan	0	½ - ½
Lee Garratt	0	1 - 0
Alex Abdullahi	1468	0 - 1
Pietro Giusto	1719	0 - 1
Alex Abdullahi	1468	0 - 1

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

488 = (5904 + 400 * (1 - 6)) / 8)