Event: Rainham Championship Div 2

Opponent Rating Result
Tyrone R Jefferies 1578 ½ - ½
Gary R Clifford 1528 0 - 1
Joshua Gillespie 1450 1 - 0
Edward Marker 1447 0 - 1
Terry Ogden 1477 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1416 = (7480 + 400 * (1 - 2)) / 5)

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