Princip of the Thing

by George Barany and Brent Hartzell

This "mid-week level" puzzle (17x17) was released on the centennial of a major event in the history of this planet (pictorial hint to the right). After completing the puzzle (spoiler), learn more about this puzzle's subject by clicking here (wikipedia) and here (New York Times front page 2014), here (New York Times front page 1914), and here ("what if?"). Also, you might enjoy listening to this. This puzzle also appeared in the September 2014 issue of Natural Selections, as accessed here.

Click here to view or download the puzzle in PDF format; here to download it as a puz file; here to download it as an ipuz file [requires the free Puzzazz app to solve]; here to solve the puzzle interactively (thanks to Jim Horne); here for the solution. We thank Marcia Brott, Martin Herbach, Arlene Romoff, and Ellen Ross for test solving and insightful comments.

If you want to tell others about this particular page, refer them to
http://tinyurl.com/princippuz

More puzzles here (all), here (political), and here (tributes).

E-mail barany@umn.edu to be added to a bcc distribution list.