Rubix Cube,Magic Cube blog

These are the Algorithms I use to permuate (put the cubies of the last layer in the correct place) the last layer.

Again there are a lot of different alg’s for these cases. This are the ones that I personaly like. On some of them I’m the only one who does the case like explained (like edge 3 cykle). On others the alg is used by almost every speedcuber (like the corner 3 cykels).

F2L is making the first 2 layers by inserting 4 corner-edge pairs. What you do in this step is connect a corner and edge and then insert them in the first layer with the cross. So after 4 of those ce-pairs you have finished the first two layers. You’ll see that most cases end with 2 different kinds of insertion: by R U R’ or with R U’ R’. I use these formula’s after finishing the cross on the white or yellow side. Mirrors are not included. Not all cases are optimal. There are shortcuts for some cases.

It is important when you want to learn Fridrich to understand the moves. I wouldn’t suggest on learning these cases!

If you have seen these cases and understand them you can make your own alg’s and you’ll probably with on the same alg’s as I have. If you doubt your alg is effective you can always look here of course, altough my algs are not for a short number of moves but for speed. For some cases it is hard to make your own alg. I got some of my from other places aswell. Some of them I have modified for my own hands.

I suggest that you can do a lot of cases from different angels. My experience is that you’ll recognise the cases quicker. Also, here comes the most important rule: Look for the next pair while solving one. By doing this you can solve more fluently which is at least as important as speed. Don’t perform the alg and then start looking for the next one. Herefore it is important to be able to perform these cases blindfold so you don’t have to think about the moves you are doing, else you can’t look ahead.

For the beginning it is not important to look ahead etc. always first learn the method and then learn how to do it fast.

Here you can find my directions to solve the cube using Fridrich method (CFOP (Cross F2l OLL PLL)). Also you can find other tutortials. There will be more of them in the future.

If you are new to Fridrich method I recommend you first read the intro to Fridrich method. Else the chance is great you think the following is alien talk or something in chinese. (no affence of course … )

Intro to Fridrich Method

Cross

The first step to solving the cube using Fridrich method is making a cross, a +.

F2L

After the cross you solve the First 2 Layers. A big step.

OLL

Almost there… Make the whole last layer 1 color.

PLL

The last step. Put all cubies in there place.

The Rubik’s Revenge (also known as the Master Cube) is the 4×4×4 version of Rubik’s Cube. Invented by Péter Sebestény, the Rubik’s Revenge was nearly called the Sebestény Cube until a somewhat last-minute decision changed the puzzle’s name to attract fans of the original Rubik’s Cube.[citation needed] Unlike the original puzzle (and the 5×5×5 cube), it has no fixed facets: the centre facets (four per face) are free to move to different positions.

Methods for solving the 3×3×3 cube work for the edges and corners of the 4×4×4 cube, as long as one has correctly identified the relative positions of the colours – since the centre facets can no longer be used for identification.

Mechanics

Rubik’s Revenge in scrambled stateThe puzzle consists of the fifty-six unique miniature cubes (“cubies”) on the surface. However, the center four cubes of each face are merely single square facades hooked into the inner mechanism of the cube. This is the largest change to the 3×3×3 cube, because the centre pieces can move in relation to each other, unlike the fixed centres on the original.

The Cube can be taken apart without much difficulty, typically by turning one side through a 30° angle and prying an edge cubelet upward until it dislodges. It is a simple process to solve a Cube by taking it apart and reassembling it in a solved state; however, this is not the challenge.

The original mechanism designed by Sebestény uses a grooved ball to hold the center pieces in place. The edge pieces are held in place by the centers and the corners are held in place by the edges, much like the original cube. There are three mutually perpindicular grooves for the center pieces to slide through.

Each groove is wide enough for two rows of center pieces, but one side of each groove is shaped to prevent the center pieces from sliding through it, preventing the ball from becoming misaligned with the outside of the cube. Turning one of the center layers moves either just that layer or the ball as well.[1]

An Eastsheen cube is on the left, and an official Rubik’s Revenge is on the right.The Eastsheen version of the cube, which is slightly smaller at 6 cm to an edge, has a completely different mechanism.

Its mechanism is very similar to Eastsheen’s version of the Professor’s cube, instead of the ball-core mechanism. The center rows on each side are completely hidden within the cube.

This design is more durable than the original and also allows for screws to be used to tighten or loosen the cube. The spindle is specially shaped to prevent it from becoming misaligned with the exterior of the cube.[2]

A disassembled Rubik’s Revenge, showing all the pieces and center ball.There are twenty-four edge pieces which show two coloured sides each, and eight corner pieces which show three colours.

Each piece (or pair of edge pieces) shows a unique colour combination, but not all combinations are present (for example, there is no edge piece with both red and orange sides, if red and orange are on opposite sides of the solved Cube).

The location of these cubes relative to one another can be altered by twisting an outer fourth of the Cube 90°, 180° or 270°, but the location of the coloured sides relative to one another in the completed state of the puzzle cannot be altered: it is fixed by the relative positions of the centre squares and the distribution of colour combinations on edge and corner pieces.

A disassembled Eastsheen 4×4×4.For most recent Cubes, the colours of the stickers are red opposite orange, yellow opposite white, and green opposite blue. However, there also exist Cubes with alternative colour arrangements (yellow opposite green, blue opposite white and red opposite orange).

Permutations

Rubik’s Revenge with a tilted sideThere are 8 corner cubelets, 24 edge cubelets and 24 centre cubelets.

Any permutation of the corner cubelets is possible, including odd permutations. Seven of the corner cubelets can be independently rotated, and the eighth cubelet’s orientation depends on the other seven, giving 8!×37 combinations.

There are 24 center cubelets, which can be arranged in 24! different ways. Assuming that the four center cubelets of each colour are indistinguishable, the number of permutations is reduced to 24!/(4!6) arrangements. The reducing factor comes from the fact that there are 4! ways to arrange the four pieces of a given colour.

This is raised to the sixth power because there are six colours. An odd permutation of the corner cubelets implies an odd permutation of the centre cubelets, and vice versa; however, even and odd permutations are indistinguishable because of identically coloured centre cubelets.[3]There are several ways to make the center pieces distinguishable, which would make an odd center permutation visible.

The 24 edge cubelets cannot be flipped, because the internal shape of the pieces is asymmetrical. The two edge cubelets in each matching pair are distinguishable, since the colours on a cubelet are reversed relative to the other.

Any permutation of the edge cubelets is possible, including odd permutations, giving 24! arrangements, independently of the corner or centre cubelets.

Assuming the cube does not have a fixed orientation in space, and that the permutations resulting from rotating the cube without twisting it are considered identical, the number of permutations is reduced by a factor of 24.

This is derived from the fact that all 24 possible positions and orientations of the first corner are equivalent because of the lack of face centers. This factor does not appear when calculating the permutations of N×N×N cubes where N is odd, since those puzzles have fixed centers which identify the cube’s spatial orientation.

This gives a total number of permutations of

The full number is 7 401 196 841 564 901 869 874 093 974 498 574 336 000 000 000 possible permutations[4] (about 7,401 septillion or 7.4 septilliard on the long scale or 7.4 quattuordecillion on the short scale).

Some versions of Rubik’s Revenge have one of the center pieces marked with a logo, distinguishing it from the other three of the same colour. This increases the number of distinguishable permutations by a factor of four to 2.96×1046, although any of the four possible positions for this piece could be regarded as correct.

Get cubed with the RUBIK’S REVENGE 4×4 cube-shaped puzzle! The best-selling strategy puzzle in history continues to challenge old and young alike with 43 quintillion combinations!

A fourth row has been added to each side of the cube, but it can still be solved in incredibly few moves. It’s unique turning action and simple color concept make the Cube the world’s number one puzzle – and gives you hours of challenging fun! Can you solve the Cube?

Cube comes with hints booklet.

Magic cube is a classical toy popular for many years, who have a lot of fans loving it very much. 

赛场视频

再上传个中岛五阶教学视频实例:555outline:

Hello, Everyone,

Welcome to our magic cube blog!

55Cube