The top level restoration formula of the Rubik s Cube? What are the top level reduction formulas of

First, third-order Rubik's Cube.

The simplest formula for the top 7 cases to restore:

First, the top layer makes a cross of the same color: r' u2 r u r' u r<>

The second is to homing the corner blocks of the same color: r' u'r u'r' u2 r<>

The third is to homing the middle edges: r u2 r' u' r ur' u' r u' r'

Fourth, to return the top edges: R2 d' r u2 r' d r u2 r<>

Fifth, to bring the top edge into place: xur'u'lur u'r<>

Sixth, to bring the corner blocks of the top layer into place: r u'u'(r'2 u')(r2 u')r'2 u' u'r

Seventh, make the top layer of the corresponding corner block homecoming: (l u' l')y(r u r u' r)

Note: Turning the Rubik's Cube twice counterclockwise is the same as turning it twice clockwise.

Where: 1+: indicates 90° rotation;

2.or: indicates a reversal of 90°;

Indicates rotation of 180°;

4.2 after parentheses: indicates repeating the content in parentheses;

Indicates a left side turn;

Indicates a right-sided turn;

Indicates a backward turn;

It means turning towards this side of oneself;

Indicates the top-level turn;

Indicates the underlying turn.

The top-level restoration formula can be divided into four types: top-level cross, top-level comprehensive, top-level four corners and final formula, with a total of five formulasThe formula is as follows:

1. Top-level cross formula:

Explanation: After the lower and middle layers are restored, the top layer is in the shape of a cross, using this formula).

Right, top, front, top, front, right

Cross Support: Front, Right, Upper, Right, Upper, Forward

Second, the top-level comprehensive formula:

Explanation: After the lower and middle layers are restored, the top layer has a single color, or there are three corners with different colors).

Right, up, right, up, right, up, up2, right

3. The formula of the four corners of the top layer:

Explanation: After the lower and middle layers are restored, only the four corners of the top are not cleared and restored, using this formula).

Right, Top 2, Right, Up, Right, Up2 Left, Up, Right, Up, Left

Fourth, the final formula:

Explanation: The color of the top is a single color, only the color of the side of the top cross four squares has not been restored, use this formula).

Front 2, Upper, Left, Right, Front 2, Right, Left, Upper, First 2

Third-order Rubik's CubeExplanation of the symbols in the formula:

1. : The face of the front direction of the front of the table is clockwise.

Spin 90.

2. : The minus sign represents the anticlockwise rotation of the face in front of the symbol in the formula of the third-order Rubik's cube by 90.

The number 2 represents a rotation of 180 for the referring face, and since it is rotated by 180, there is no need to additionally indicate whether it is clockwise or counterclockwise.

Example: 1. "Right +" means that the right side is rotated 90 clockwise

2. "Left 2" means that the left side is rotated 180 (both forward and reverse).

The general formula for the last layer of the Rubik's Cube is right inverse, upward straight, right inverse, upward inverse, right inverse, upward inverse, right inverse, upward straight, right straight, right straight, right straight 180. When the Rubik's cube is restored, it is generally restored according to the seven-step reduction method, and the steps of the seven-step reduction method are the top cross, the bottom edge returning, the bottom corner returning, the edge block returning, the top edge position, and the top corner surface position.

HistoryTry it early. In March 1970, Larry Nichols invented the "Puzzle with Pieces Rotatable in Groups" and applied for a Canadian patent, which is a 2 2 2 Rubik's cube, but each block is attracted to each other by magnets. In 1972, he obtained a U.S. patent for Birubic.

The Professor's third-order Rubik's Cube.

Two years earlier. Originate.

Rubik Airno is Hungary.

Professor of Architecture and Sculpture, in order to help students learn about the cube of space.

so he made the prototype of the first Rubik's cube with his own hands, inspired by the Danube.

in the gravel.

Rubik's cube top-level reduction formula. Top cross (color) bottom left, top left, front right, top right, front left, top left.

Top Corner Block (Color) Left Hand: Top Left, Top Right, Bottom Left, Top Right, Top Left, Top 180, Bottom Left.

Right hand: upper right, upper left, lower right, upper left, upper right, upper 180, lower right.

Top corner block (position) Left hand: Left 180, Front 180, Lower Left, Back Left, Top Left, Front 180, Lower Left, Back Right, Lower Left.

Right hand: Right 180, Front 180, Lower Right, Back Right, Top Right, Front 180, Lower Right, Back Left, Lower Right.

Top layer edge (position) Left hand: top left, top right (followed by the second layer left hand formula), bottom left.

Rubik's Cube restores the formulaThe formula for the situation is: (Ascend, Right, Ascend, Right, Ascend, Ascend, Ascend, Ascend, Ascend, Ascend,

The formula for the situation is: (upward reversal, forward reversal, upward order, forward order, top order, right order, right direction, right direction).

Forward Straight, Right Straight, Up Straight, Right Reverse, Upper Reverse, Forward Reverse.

Right Shun, Ascend, Right Reversed, Ascended, Ascended, Reversed.

Ascending, right, up, left, up, right, up, left.

Right reverse, downward reverse, right converse, downward transverse) can be repeated multiple times.

The top formula of the Rubik's Cube is: bottom left, top left, front right, top right, front left, top left. Top cross lower left, upper left, front right, upper right, front left, top left.

The top corner block is left-handed, upper left, upper right, lower left, upper right, upper left, upper 180, lower left. Right hand: upper right, upper left, lower right, upper left, upper right, upper 180, lower right. Top corner block left hand, left 180, front 180, bottom left, back left, top left, front 180, bottom left, back right, bottom left.

About the origin of the Rubik's CubeRubik Erno, a Hungarian professor of architecture and sculpture, made the first prototype of the Rubik's Cube inspired by the sand of the Danube to help his students understand the composition and structure of the cube of space.

In 1974, Professor Rubik invented the first Rubik's cube and in 1975 he was granted the Hungarian patent number HU170062, but did not apply for an international patent. The first Rubik's Cube was sold in toy stores in Budapest in 1977. Unlike Nichols' Rubik's Cube, Professor Rubik's parts are snapped together like tenons, not easily separated by external forces, and can be made of any material.

As long as the four corners are restored by a Zheng or angle, you can use the formula, put the reduced angle in the lower left corner (the angle where the left side meets the front), and use the formula l'ru'lur'u'l'ul, which are the three corners that have not been reduced, jump counterclockwise and put the reduced corner in the lower right corner (the angle where the right side meets the front).

With the formula l'ru'lur'Clever search u'l'ul, is the three unrestored corners jump counterclockwise, if two corners have been restored, the remaining two corners will be restored to the two corners.

Put on the left, with the formula L'ru'lur'u'l'ul, and then the whole Rubik's Cube turns counterclockwise.

Rubik's Cube Notes.

1. To crack the Rubik's Cube, you must first understand its structure, the Rubik's Cube has a total of 6 colors and 6 sides, and each side is divided into ** blocks (6 blocks in the middle), corner blocks (8 blocks in 4 corners) and side blocks (12 blocks in the middle of 4 sides). There is only 1 face in the ** block, they are a fixed structure, so ** is a red block, then the other red should be concentrated on this face.

2. R (on behalf of the right side clockwise, the needle turns 90 degrees), R'(90 degrees counterclockwise on the right), R2 (90 degrees clockwise on the right).