A virtually unlimited supply of randomly-generated logic puzzles, in a variety of sizes and difficulties: Nonograms. Slither Link. Nurikabe. Bridges. Light Up.
posted by Upton O'Good on Nov 28, 2007 - 18 comments

Nonograms (also known as "Griddlers" or "Paint By Numbers") were invented by Non Ishida in 1987. Originally trying to design pictures that could be created by turning the lights on or off in the windows of skyscrapers, Ishida soon realized that the same principle could used as the basis for a new genre of logic puzzle. Since then, enigmatologists around the world have wasted hours solving them online and completing entire books of these elegant brainteasers.
posted by Shadowkeeper on Sep 26, 2002 - 16 comments