Event: Hillingdon Div 1

Opponent Rating Result
George Horan 1926 1 - 0
Ian W Salisbury 1855 1 - 0
John M Quinn 2183 1 - 0
Colum Jezierski 2005 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2392 = (7969 + 400 * (4 - 0)) / 4)

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