Designed by Serhiy Grabarchuk, made by J. A. Storer 2007.
(4" x 4" x 3/4" wood tray, 7 wood pieces, and black plexiglass keeper)
Move all the pieces clockwise one unit:
Baxter's Page lets you play this puzzle on-line to try to find the 31 move minimal length solution.
Baxter's Page, from: http://www.johnrausch.com/SlidingBlockPuzzles/serhiy.htm