Event: Rainham Championship Div 2

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Opponent Rating Result
Tyrone R Jefferies 1541 ½ - ½
Robert Springett 1650 0 - 1
Tyrone R Jefferies 1574 ½ - ½
Gary R Clifford 1578 1 - 0
Gary R Clifford 1578 1 - 0
Robert Springett 1655 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1596 = (9576 + 400 * (2 - 2)) / 6)

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