Nonograms are deceptively simple logic puzzles: You use digits to create a pattern of filled-in squares in the empty grid provided. Each number on the lines outside the grid represents a block of squares to be blacked out in that row or column (see 1 Across). Once all the correct squares are filled in, a picture emerges. This nonogram adds crossword-inspired clues to make things even more interesting. The answers are numbers that you write into the spaces provided, which then help you find the date-appropriate image.
Download a printable version of the puzzle here.
source: nytimes.com