ノノグラム

nonograms katana. sharpen your mind! you can play in a browser on pc and mac, or download the app on google play and apple app store. nonograms, also known as hanjie, griddlers, picross, japanese crosswords, japanese puzzles, pic-a-pix, paint by numbers and 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.