Jigsaw puzzle

The grid is designed so as to make this a genuine challenge: there are six words each of four to nine letters, and nothing longer – normally it’s the long lights that are the key to a jigsaw puzzle.

There is also the restriction with alphabeticals that the online interactive program for solving puzzles cannot cope with them, because the software is written on the basis that every numbered clue corresponds to the matching numbered slot in the grid. As this cannot be the case with a jigsaw puzzle, when it is faced by one the system has a nervous breakdown.