Event: Hillingdon Div 2

Opponent Rating Result
Xavier Cowan 1902 0 - 1
Ramin Tawab 1942 0 - 1
James Lyons 1597 0 - 1
David A Stott 1391 1 - 0
Llloyd Millwood 1324 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1551 = (8156 + 400 * (2 - 3)) / 5)

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