Event: Hillingdon Div 1

Opponent Rating Result
Jason Obihara 1782 0 - 1
David J White 1861 0 - 1
John Tobisch 1914 0 - 1
JJ Padam 1712 0 - 1
Ahmad Norzai 1755 0 - 1
Nigel Colter 1764 0 - 1
Daniel Knight 1723 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1387 = (12511 + 400 * (0 - 7)) / 7)

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