Event: Hillingdon Div 2

Opponent Rating Result
Mark Connor 1412 ½ - ½
Ifemuyiwa Olayinka 1539 0 - 1
Alastair G Johnstone 1580 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1244 = (4531 + 400 * (0 - 2)) / 3)

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