Event: D&DCL Div 2

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Opponent	Rating	Result
Andre Cockburn	1589	1 - 0
Paul Kelman	1597	1 - 0
Stuart Marshall	1726	½ - ½

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

1904 = (4912 + 400 * (2 - 0)) / 3)