Event: Hillingdon Div 1

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Opponent Rating Result
David C Okike 2273 ½ - ½
Antanas Zapolskis 2252 0 - 1
Sab Jhooti 1891 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1872 = (6416 + 400 * (0 - 2)) / 3)

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