Seven of the corners can be independently rotated, and the orientation of the eighth depends on the other seven, giving 3 7 (or 2,187) combinations. There are 98 pieces on the exterior of the cube: 8 corners, 36 edges, and 54 centers (48 movable, 6 fixed).Īny permutation of the corners is possible, including odd permutations, giving 8! possible arrangements. Both the Eastsheen 5×5×5 and the V-Cube 5 are designed with different mechanisms in an attempt to remedy the fragility of the original design. Applying excessive force to the cube when twisting it may result in broken pieces. Because of the fragile design the Professor Cube is not suitable for speedcubing. The original Professor Cube is inherently more delicate than the 3×3×3 Rubik's Cube because of the much greater number of moving parts. This cannot occur on the Eastsheen or V-Cube puzzles.
Unlike the original 5×5×5 design, the V-Cube 5 mechanism was designed with speedcubing in mind.Īn original cube with a misaligned center. This allows smooth and fast rotation and creating arguably the fastest and most durable version of the puzzle. The middle edges and center pieces adjacent to them make up the supporting frame and these have extensions which hold rest of the pieces together. The corners reach to the center of the puzzle (like the original mechanism) and the center pieces hold the central edges in place (like the Eastsheen mechanism). The V-Cube 5 mechanism, designed by Panagiotis Verdes, has elements in common with both. The non-central edges hold the corners in place, and the internal sections of the corner pieces do not reach the center of the cube. The fixed centers hold the centers next to the central edges in place, which in turn hold the outer edges. The Eastsheen version of the puzzle uses a different mechanism. This feature is unique to the original design. The fixed centers have two sections (one visible, one hidden) which can turn independently. All non-central pieces have extensions that fit into slots on the outer pieces of the 3×3×3, which keeps them from falling out of the cube while making a turn. The original Professor Cube design by Udo Krell works by using an expanded 3×3×3 cube as a mantle with the center edge pieces and corners sticking out from the spherical center of identical mechanism to the 3×3×3 cube. This version has colored tiles rather than stickers. You are essentially making the cube look like Figure 15, then using Move 8, then re-orienting the front pieces.Early versions of the 5×5×5 cube sold at Barnes & Noble were marketed under the name "Professor's Cube" but currently, Barnes and Noble sells cubes that are simply called "5×5." offers a limited edition version of the 5×5×5 cube called the Professor Cube. Rotate the front (red side) two turns (F2), perform Move 8, then rotate the front two more turns (F2). In words, rotate the middle vertical slice (between the blue and white sides) one quarter turn clockwise (away from you), the top side 1/4 turn clockwise, the vertical slice 1/4 turn up, the top 1/4 turn clockwise, the vertical slice 1/4 turn up, the top two quarter turns (half-way around), the vertical slice 1/4 turn counter-clockwise (back toward you), the top 1/4 turn clockwise, etc.
Next, place the remaining two center-edge pieces in the top positions and, if misoriented, perform Move 8. If two center-edge pieces are correct and the two that are wrong are diagonal to each other then perform step 7b and proceed to step 7a.įirst orient the cube so that the two misoriented center-edge pieces are on the top side of the cube as shown in Figure 15 and perform Move 8. Rubik himself (since he formulated it), will flip the two center-edge pieces on the top side of the cube shown in Figure 15. The following "Rube Move", named after Mr. Step 7: Orient the four center-edge pieces
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