Event: BCL Division 2

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Opponent	Rating	Result
Ramsey Dairi	1856	0 - 1
Lucian Cox	1674	1 - 0
Andrew Bowler	1887	0 - 1
Dave Wells	1683	½ - ½
Marek Gladysz	1818	½ - ½

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

1704 = (8918 + 400 * (1 - 2)) / 5)