Nonograms also known as Hanjie Paint by Numbers Picross Griddlers
and Pic-a-Pix and by various other names are picture logic puzzles
in which cells in a grid must be colored or left blank according to
numbers at the side of the grid to reveal a hidden picture. In this
puzzle type the numbers are a form of discrete tomography that
measures how many unbroken lines of filled-in squares there are in
any given row or column. For example a clue of "4 8 3" would mean
there are sets of four eight and three filled squares in that order
with at least one blank square between successive sets.
These puzzles are often black and white—describing a binary image—but they can also be colored. If colored the number clues are also colored to indicate the color of the squares. Two differently colored numbers may or may not have a space in between them. For example a black four followed by a red two could mean four black boxes some empty spaces and two red boxes or it could simply mean four black boxes followed immediately by two red ones. Nonograms have no theoretical limits on size and are not restricted to square layouts.
Nonograms were named after Non Ishida one of the two inventors of the puzzle.
These puzzles are often black and white—describing a binary image—but they can also be colored. If colored the number clues are also colored to indicate the color of the squares. Two differently colored numbers may or may not have a space in between them. For example a black four followed by a red two could mean four black boxes some empty spaces and two red boxes or it could simply mean four black boxes followed immediately by two red ones. Nonograms have no theoretical limits on size and are not restricted to square layouts.
Nonograms were named after Non Ishida one of the two inventors of the puzzle.
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