Hitori ("leave me alone") are spatial logic puzzles in which the objective is to eliminate (click) cells in the grid so that when you are through, no row or column contains the same number twice. "So I just fill in every cell", you think, "What's the problem?" Well, there are a couple of devilish restrictions. (1) Filled-in (clicked) cells may NOT be horizontally or vertically adjacent to one another (but diagonally adjacent is okay), and (2) At the end, all unfilled (unclicked) cells must remain completely connected horizontally and/or vertically (or, in other words, you may not have any "islands" of unfilled cells that are walled off from the rest of the puzzle via diagonally-connected filled-in cells.) Oddly enough, these are the full and complete rules of hitori, though I would advise that you check out an online guide for tips and tricks before you start playing. When you understand why the "5" at Row 8 Column 7 MUST be filled in (because of what's at R1/C7 and R2/C7), you're probably good to go. Every proper hitori puzzle has a unique solution. ****** As I mentioned, this is STRICTLY an experiment. Hitori puzzles are not well suited to Sporcle because ideally you should have a way to mark a cell as "safe", or definitely not to be filled in. This is impossible under current Sporcle clickable-quiz limitations; one of the points of making this puzzle is to demonstrate to TPTB that such a feature would have value. (Fortunately this puzzle, from the Wikipedia article on hitori, is pretty easy.) Ignore the random apostrophes and squiggles that start each cell, because they are there only to ensure uniqueness among the answers (and to add enough space that the grid rows wrap where they're supposed to) -- ONLY the numbers are relevant to the solution. There is only one solution. Good luck.