Nonogram — also called Picross or Griddlers — is a picture logic puzzle. Each row and column has a set of numbers that describe the lengths of the consecutive filled-in blocks in that line. Using only logic, you work out which squares must be filled and which must be blank until the whole grid is solved. It is a superb workout for logical reasoning and patience.
No — marks are just a memory aid for squares you have deduced are blank. Only the filled squares decide the puzzle.
Yes, the daily board comes from the same seed. Hit “Play again” for unlimited fresh practice boards.
By how quickly you solve the grid — faster solves score higher.