Picross Nonograms

Nonograms appeared at the end of the 20th century and became popular all over the world. They are also known as Japanese crosswords, Japanese puzzles, Griddlers, Paint by Numbers, Picross, hanjie etc. Japanese crossword is a very popular puzzle game. In the Nonograms, unlike conventional crosswords and arrowwords, a picture instead of words is conceal by means of numbers.