Cryptograms, wordsearch, fill-a-pix, nonograms, and the like. Sone types (like cryptograms) are simple generate using a program. Others, though, are pretty damn tricky… it’s a puzzle in and of itself figuring out how to make the puzzle. Currently working on some Logic Grid puzzles… the program I’m writing to make them is a real pain-in-the-ass. But, unlike most here, programming is a hobby so I throughly enjoy wasting time in the challenge.