This puzzle was invented by Fred Irvine of New Zealand.
Did Fred name the puzzle after himself or is FRED an acronym for Fourteen Relatively Easy Designs ?
The object of the puzzle is to first build the light and dark cubes.
Then take one "L" shaped piece from the light cube and swapping it with one "T" shaped piece from the dark cube make the next two cubes. Then swap another "L" piece with a "T" piece and make the cubes again... and so on until all "L"s have been swapped for "T"s.
Did Fred say fourteen relatively easy designs?
The light cube is made from Queensland Silver Ash. The dark cube is made from Queensland Walnut. They are presented in a Rosewood slide lid box.
As the name suggests it is NOT a Wine Rack but rather an adaptation of the two dimensional interlocked squares in the puzzle LOCKED LINKS which Edwin M. Wyatt showed in his book Puzzles in Wood (1956).Mr Puzzle has created three dimensional interlocked cubes in contrasting colours for a spectacular appearance.
The light timber is Queensland Silver Ash and the dark timber is Queensland Walnut.