All a bit of a fiddle

[Danloor]

Hello,
I've trouble with this expression. Can you help me?
From a poker book:
"As we have seen, this calculations are easy enough to make using our basic spreadsheet (so that you don’t need to keep monotonously repeating the same calculations). However, it is all a bit of a fiddle and it is difficult to get accurate results except in the case..."

Thanks

 

[ewie]

It's noun definition 3 in our dictionary, Danloor: 'an unnecessarily intricate or awkward task'