Event: Rainham Championship Div 2

Opponent Rating Result
Gary R Clifford 1489 1 - 0
Robert Springett 1640 ½ - ½
Chris D Brown 1457 1 - 0
Terry Ogden 1350 1 - 0
Tyrone R Jefferies 1567 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1821 = (7503 + 400 * (4 - 0)) / 5)

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