Event: Hillingdon Div 3

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Opponent Rating Result
James Lyons 1694 0 - 1
James Lyons 1694 0 - 1
Gabriele Martellotta 1379 ½ - ½
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1322 = (4767 + 400 * (0 - 2)) / 3)

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