19 Aug '12 01:43>
I have a 9-piece puzzle which (now, at last) takes me an hour to do - and most people I offer it to can't get it out at all. It's a plain colour, and the shapes are curved without any knobs. No clues from colour or piece shape. Once it's assembled there's a silhouette of a whale INSIDE an irregular coloured border.
How small can a puzzle be if it's to be virtually unsolvable, i.e. if trial and error is the only possible method?
How small can a puzzle be if it's to be virtually unsolvable, i.e. if trial and error is the only possible method?