Soma cube cube problem. There are 240 distinct solutions of the Soma cube puzzle, excluding rotations and reflections: these are easily generated by a simple recursive backtracking search computer program similar to that used for the eight queens puzzle. Current world record for the fastest time to solve a soma cube is 2.93 seconds and was set by Krishnam Raju Gadiraju, India. The seven Soma pieces are six polycubes of order four, and one of order three: Piet Hein authorized a finely crafted rosewood version of the Soma cube manufactured by Theodor Skjøde Knudsen's company Skjøde Skjern (of Denmark). Beginning in about
Gear Cube gears externally in order for the mechanics to be seen. At first sight, it looks quite formidable, nevertheless it is actually simpler to solve than the original Rubik's Cube. There are two objectives when solving the cube. The first goal is taking the mixed up puzzle back to its original cubic state. The second goal is to actually solve the puzzle by arranging each side back to their own beginning colors. The Gear Cube has a design like no other because the puzzle is made almost completely out of gears. The cube has 12 edge pieces, four on every layer,