One Fish Another Fish
Designed by S. Gabarchuk, made by D. Namdarian, 2011, sleeve made by J. A. Storer.
(laser cut plastic, 4.8" x 5.9" inches)
As shown on the puzzle sleeve above,
start with a pattern with a ball on the left and slide the pieces to form a symmetric pattern with a ball on the right.
All the pieces have a square bottom layer that can pass under the curve rims at the corners.
The three blank blue pieces can move anywhere,
but the other pieces have a red or yellow shape on the top layer that prevents them from moving into some corners.
Without the curved corner rims,
the puzzle could be solved in 34 moves,
but as is,
36 moves are needed: