BoxOff Gems Edition

BoxOff is a solo game of finding rectangles with two opposing corners defined by two same-colored gems. Once such a rectangle is identified, and if there are no other gems within the rectangle or on its edges, these two gems can be removed. Sounds easy? Think again. Since the invention of BoxOff in 2013, the game has been featured in Games Magazine, Games World of Puzzles, Abstract Games Magazine, and presented at an artificial intelligence conference. Reviewers have called it "more of a game than a puzzle" and "destined to be a classic."

This tabletop gem version features a flexible rubber-backed game- board, and 64 colored stones (16 each of 4 colors). Made in the USA for players age 12+. Average game time is 20 minutes.