Konstantin Achkov's idea is not at all as far-fetched as it might sound at first. After all, almost every large piece of furniture from Ikea needs to be assembled. But while Ikea tries to provide you with all the pieces and some more, so that you end up wondering if you might have forgotten something, the Bolgar idea goes in the diametrically opposite direction. He found inspiration for wooden furniture in assembling puzzles, precisely because of the special joint...
