Event: Durham League Division B

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Opponent Rating Result
Felix Watts 1401 1 - 0
Sam Ball 1429 1 - 0
Kenneth Boxall 1597 1 - 0
Vaughan Davison 1622 1 - 0
James Urwin 1388 1 - 0
Paul D McGuigan 0 1 - 0
Barry Edgar 1587 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

1689 = (9024 + 400 * (7 - 0)) / 7)

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