Masyu, also known as Pearls, is an NP-complete logic puzzle created by the makers of Sudoku. Brandon McPhail provides a few free puzzles to get your feet wet on his web site (Java applet). Once you've mastered those, UCLICK Games offers a free daily puzzle (Flash) with the past month of archives available too. [more inside]
posted by The Winsome Parker Lewis on Jan 18, 2012 - 28 comments

"I am Colonel Tom C. McKenney, You must know how to reach Bobby Garwood. I directed an official mission to assassinate him behind enemy lines, because I believed what they told me. Would you tell him that I will crawl on my hands and knees to beg his forgiveness?"
posted by drakepool on May 30, 2005 - 22 comments