Designed and mad by Stewart Coffin, 2013
(maple and paduk on a plywood bottom, 3.7 x 3.7 x 3/4", signed on the bottom;
one of 4 puzzles purchased during a visit with the designer in 2014)

Shown on page 155 of the Coffin AP-ART book. This puzzle is already a challenge due to the number of pieces and that they are two sided. Also, when it is given to someone with the pieces out of the box, there is a natural tendency to put them in so that they fit tight into the corners, in which case one inevitably ends up with having two pieces left that will not fit into the final corner. It is only after noticing that although the pieces are precisely cut, space is left between the packing and sides of the frame, and so something seems wrong (in fact, that space is equal to the space in the corners when the puzzle is correctly solved).