The mellow soap poured into a long square form can be cut in perfectly similar pieces. The press has a frame made of iron profile on which I welded right in the middle of the two sides one-one longitudinal roll-bear bushings. Two handles help the manual pressing procedure. The cutting-strings are stainless-steel wire, with a huge breakingstrength, that can be pulled to the needed tightness by fine threaded screws.
So this puzzle it's a really big challange. The autor of the puzzle is Livio Zucca italian matematician. He said: if you do'nt have a hell of luck, you need 3 lifetime to solve it. Theoreticly there is just one solution.