Event: D&DCL Div 2

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Opponent	Rating	Result
Martin Cobham	1780	0 - 1
Stephen Lamont	1681	0 - 1
Kieran Redhead	1640	½ - ½

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

1434 = (5101 + 400 * (0 - 2)) / 3)