Event: D&DCL Div 1

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Opponent Rating Result
Simon N Gilmore 2110 0 - 1
Vaughan WG Smith 1631 1 - 0
Alistair Jones 1757 0 - 1
D Martin Howard 2002 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1775 = (7500 + 400 * (1 - 2)) / 4)

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