Event: Division 2

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Opponent Rating Result
Terry D Whitton 1892 0 - 1
Simon C Moth 1792 0 - 1
Neville H Twitchell 1965 0 - 1
Mustapha Rahaman 1667 1 - 0
Neville H Twitchell 1965 0 - 1
Farhan Abedin 1553 0 - 1
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1539 = (10834 + 400 * (1 - 5)) / 6)

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