Event: D&DCL Div 2

Opponent Rating Result
Dudley Thorpe 1330 ½ - ½
Dudley Thorpe 1330 1 - 0
Tomasz D Adamski 1720 0 - 1
Leslie J Fancourt 1563 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1486 = (5943 + 400 * (1 - 1)) / 4)

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