Fancy playing Sudoku with pixels? Quixel is all about nonograms, which are little logic picture puzzles.
Nonograms look a bit like crossword or Sudoku grids, but instead of containing words or numbers each square contains a pixel. If you reveal all the pixels, you reveal the image they make.
It sounds simple but trust us, it’s really challenging. To reveal the pixels you need to guess where they are, and to do that you have to get your thinking cap on.
Each column and row has a number, and that number tells you how many unbroken runs of pixels there are in that line – so for example if there’s a 5, that means there’s a line of five pixels in that row or column; if there’s a 2, the line is only made of two pixels. ‘2 2’ means there are two pixels, then a gap, then two more.
What you have to do is convert those clues into pixels. At first that’s easy, but once Quixel has lulled you into a false sense of security, the puzzles start to get much harder.
The game manages to walk the fine line between challenge and frustration: it’s tough enough to give you a real sense of achievement, but never so tough you’ll rage-quit.