I haven't done a jigsaw for years as I know they can be rather addictive. But I found this one when I was clearing my parents' house and thought I'd do it before taking it to a charity shop.
The box says that it's the world's toughest jigsaw and it's certainly the most difficult I've ever done. Some of the words I'd never heard of so I couldn't match them with their definitions; others the text isn't a definition but more of a description "this is the most common letter in the English language..." I've had parts put together and then had to take them apart again. I've had corner pieces in the middle!
I ended up having to check a couple of definitions to get me back on track. It's taken about three weeks to finish. I'll be able to get my craft table back now!