Switch Back

Made by Binary Arts, 1994.
(plastic, 6.5 inches by 7.1 inches by 1 inch thick)

Slide rows left and right by one unit (by pushing on the ends of the rows under the left and right edges of the puzzle), tipping and rolling marbles so as to position them to match one of the 52 patterns suggested in the booklet that comes with the puzzle; four of these patterns are shown on the top and bottom edges of the puzzle.