Definition of torture?

Over 100 pieces of plain black jigsaw pieces?

Eagle jigsaw torture
Eagle jigsaw torture
I could at least see whether the pieces were "horizontal" or "vertical" and for some of them which why up they went.  And last night when the lights were on, I could make out the tiniest variation in shade.  

I did actually finish it last night - it wasn't as bad as I thought it would be...