How to play 3X3 Rubik s Cube? What are the rules?

The letters represent the six sides of the Rubik's cube: right, r, left, l, up, u, down, d, front, f, and b

90 degrees clockwise is represented by the letter [ ].

90 degrees counterclockwise with [.]'] letters represent.

180 degrees clockwise is represented by the letter [2].

180 degrees counterclockwise with ['2] The letters represent the Rubik's Cube formula step introduction Introductory formula (layer first method):

Step 1: The bottom edge is returned to position (also known as the bottom cross, the process of correct restoration of the bottom four edges).

Step 2: Bottom corner homing (restore the four corner blocks of the first layer of the Rubik's Cube):

Equation 2-1: (r u r'）

Equation 2-2: (f.)'u'f）

Step 3: Middle Ridge Homecoming (the step to restore the four edges in the middle layer of the Rubik's Cube):

Equation 3-1: (u' f' u f ）（u r u' r'）

Equation 3-2 :(u r u' r'）（u' f' u f）

Step 4: Top edge position (also known as the top layer shelf cross, the top color of the top four edges is the same as the color of the top center block):

Equation 4: f (r u r' u'）f'

Step 5: Top Corner Face Position (the step in which the top surface color of the four top corners of the Rubik's Cube is adjusted to the top surface):

Equation 5-1:r' u2 r u r' u r

Equation 5-2: u' r u'u' r' u' r u' r'

Step 6: Apex corner homing (the other two sides of the four vertex corners of the face position are the same color as the center block of the corresponding face):

Equation 6: r b' r f2 r' b r f2 r2

Step 7: Vertice homing (the color of the other side of the four vertex ridges that have been placed is the same color as the color of the center block of the other four faces):

Equation 7: (r u' r）（u r u r）（u' r' u'r2) o, no copying!

I wish you a speedy success!

It's not very clear. Detail.

Regularity is the step. Layer by layer. Steps: Bottom cross, four corners; the second layer of four edges; Top cross, four corners, angular homing. Of course, to learn the Rubik's Cube, you need to learn the formula of the Rubik's Cube. Go.

Check it out. There is an introductory one, which is easy to learn.

The 3x3 Rubik's Cube universal solution is as follows:

Restore the bottom center block: This step is easy to implement, any color for the bottom surface. Observe the corners first, for example, find the corners that contain the red faces (there are three), determine which face the red is on (the red faces of the three corners can be formed), and place the red faces of the three corners on this plane.

Rotate one of these three corner blocks, rotate the corner blocks so that its red side aligns with the red face of the corresponding red center block, and rotate the first and second layers to the plane where the step is located at the same time. The same method is used for the second corner block, the third corner block.

Restore the flute: Restore the bottom layer (restore the three flutes on the bottom layer) Step 1: Suppose the red side is used as the bottom layer, and the Rubik's Cube is held in both hands (the left and right hands each hold a corner, the red side is parallel to the horizontal plane, and the corner block without the red side is placed on the top.

In this case, we call the face we are facing as the front).

Step 2: Observe the three flutes on the second layer at this time, look for the flutes with the red side, determine the other color of this flute, and then turn the top to reach the surface where this color is located. As shown in the figure below, take blue as an example, turn the top, the red and blue flutes turn to the blue side, and the blue side of this flute may be in the x or y position of the above figure (the red side of this flute is facing away from us).

Step 3: At this time, the flute is returned, that is, the edge block at x or y is swapped with the flute block where z is located.

Suppose x and z are swapped, and the rotation ** is: r'tr assumes that y and z are swapped, and the rotation ** is: lt'l 。Repeat sequence 2 and sequence 3 to complete the bottom flute restoration.

There are some precautions during this period: No. 1: During operation, the color of the bottom surface should be kept unchanged; No. 2: The bottom layer of the corrugated block may have the situation that the color is flipped, that is, the position of the corrugated block is correct, but the color is wrong, and the colors on both sides should be flipped.

The solution is to replace the flute with one of the above formulas, and then repeat the sequences 2 and 3 to place it correctly; Step 3: Finally rotate the top to its correct position (i.e. the top two layers meet the requirements of step 1 to restore the center block. )

3x3x3 Rubik's Cube Shorthand Formula:

1. Restore one side.

2. The bottom layer and the center block of the four sides are restored, and the complete surface of the first step is restored as the bottom, and the trapezoidal shape formed by the bottom layer and the center block of the four sides is restored, and the side of the first step is still intact while the second step is completed.

3. The middle and left squares are subtracted, left subtracted, added, left, added, added, added, subtracted, subtracted, subtracted 2, and the middle and right squares.

4. Add before, add right, add up, subtract right, subtract up, subtract before.

5. Right plus, plus up, right subtract, plus up, right plus, plus 180 degrees, right minus.

6. Add up, add right, subtract up, subtract left, add up, subtract right, subtract up, add left.

7. Right subtraction, bottom subtraction, right addition, bottom addition, right subtraction, left subtraction, right addition, bottom addition.

The Rubik's Cube starts. Rubik 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 (then known as the Magic Cube) and in 1975 received 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.

In September 1979, Ideal Toys brought the Rubik's Cube to the world, and in 1980 it was unveiled at international toy fairs in London, Paris and the United States.

After the exhibition, Ideal Toys changed the name of the cube to RUBIK'S Cube, in May 1980, the first batch of Rubik's cubes were exported in Hungary.

The formula and description of the third-order Rubik's Cube reduction are as follows:

1. Take a side to draw a cross, and ensure that the four side center color blocks corresponding to the cross are consistent with the cross; Align the four corners and do a handstand to make it an inverted T-shape; (No formula is required for this step).

2. Two formulas: t1 is used to move the side block directly above the front side to the right of the front side, and t2 is used to move the side block on the right side to the right side due left.

t1: front + up + front + up + front + front + front up front

t1:f+u+f+u+f+u-f-u-f-

t2: top right top right top right top right + right + up + right +

t2:r-u-r-u-r-u+r+u+r+

3. Draw a cross on the item layer, using a formula:

t3: Right Up Front Up + Front + Right +

t3:r-u-f-u+f+r+

4. Spell the top surface of the third layer, using two formulas:

t4：r-u-r+u-r-(u-)2r+

t5:f+u+f-u+f+(u+)2f-

Use t4 or t5 when there are three variegated corner blocks on the top layer. When the corner blocks of the third layer (the same color as the top layer) are arranged counterclockwise, T4 is used when arranging them clockwise, and T5 is used when they are arranged clockwise, and the corner blocks in the upper left corner of the top layer are the correct color blocks before use.

5. Spell the four corner blocks of the third layer to make them consistent with the four sides, and use a formula:

t6：l+f-l+b2l-f+l+b2l2

6. In the last step, adjust the position of the top layer side block to make it return to position, we use the three-cycle method, that is, the left, front, and right side, and the top layer side block of the three sides moves clockwise or counterclockwise, while the back (B side) does not move. Formula:

t7: (counterclockwise) r+u-r+u+r+u+r+u-r-u-r-r2

t8: (clockwise) r2u+r+u+r-u-r-u-r-u+r-

Restoration ideas: The first step: make a cross of the same color at the top.

Step 2: Align the corner blocks of the same color.

Step 3: Align the middle edges.

Step 4: Return the top edges to their positions.

Step 5: Align the top edges.

Step 6: Align the corner blocks on the top floor.

Step 7: Return the top layer to the corresponding corner block.

Rotate 90°; or: reversal 90°; 2: Rotate 180°; 2 after parentheses: Repeat the content in parentheses.

l=left; r=right; b=back; f=front; u=above; d=Bottom.

The 3x3 Rubik's Cube formula is:Six-sided palette formula: u'df'blr'u'd。

Four-color palindromic formula: b2lrbl2bfdu'bfr2f'lr。

Symmetrical checkerboard formula: l2r2f2b2u2d2.

Six-sided color e formula: f2r2f2u'r'b2flr'ul'rubu2f2d'u'。

Six-sided cross formula: B2F'l2r2d2b2f2l2r2u2f'。

Four-sided cross formula: df2r2f2d'ur2f2r2u'。

Description:

Uppercase means one layer, lowercase means two layers, a single letter means 90° clockwise, a letter plus one apostrophe means 90° counterclockwise, and the number two after the subtitle means two 90°, which is based on the direction of rotation facing the face.

3x3 Rubik's Cube seven-step formula formula: bottom edge homing, bottom corner homing, middle edge homing, top edge position, top corner face position, top corner homing, top edge homing. Rubik's Cube Formula Description:

R-right right, L-left left, U-up above, D-Down below, F-front front, B-back back.

The third layer of formula (starting from the cross): right reverse - upward reverse - forward reverse - upward shun - forward shun - right shun The third layer formula (four corner blocks): right shun - upward shun - right reverse - upward shun - upward shun 180° - right shun - right inverse.

The third level of the formula (also four corners): right straight - upward - right reverse - upward reverse - right reverse - forward - right straight 18° - upward reverse - right reverse - upper reverse - right straight - right reverse - forward reversal.

The third level of formula (also center): right shun - upward reverse - right shun - upper shun - right shun - upper shun - right shun - lower reverse - right reverse - upper reverse - right 180°, of which the fifth step has appeared "two after four left" such a formula.

Summary. Hello, the formula formula of the three-by-three Rubik's cube is as follows:

1. Make a white cross. Clause.

Second, the first layer of formulas: right, up, right, up, right, right, up, up, right. Clause.

3. The second layer of formulas: right order, upward order, right order, right order, right direction. Clause.

Fourth, the second layer of the formula is reversed: right inverse, upward inverse, right inverse, upward inverse, right inverse, upward order, right order, right order, right order. Clause.

Fifth, the third level of formula: right, up, right, up, right, right, up, up, right.

How to spell a three-x-three Rubik's cube.

Hello, the formula formula of the three-by-three Rubik's cube is as follows:

1. Make a white cross. Clause.

Second, the first layer of formulas: right shun, upper shun, right such as the first inverse of the code, upper shun, right shun, upper die bridge shun, upper shun, right inverse. Clause.

3. The second layer of formulas: right order, upper order, right order, upper order, right reversal, upper reversal, right reverse slag number, upper reversal, right reversal. Clause.

Fourth, the second layer of the formula is reversed: right inverse, upward inverse, right inverse, upward inverse, right inverse, upward order, right order, right order, right order. Clause.

Fifth, the third level of formula: right, up, right, up, right, right, up, up, right.

The principle of the change number of the third-order Rubik's cube is as follows: 1. 8 corner blocks: the position can be swapped (8!

It is also possible to flip the direction of the cherry blossom (38), but it is not possible to flip a corner block alone (1 3), so there is 8!37 variations. 2. 12 edges:

Positions can be swapped (12!) can also flip the direction (212), but it is not possible to exchange a pair of edges (1 2) alone, nor can it flip a single edge (1 2), so there is 12!212 2 2 ) variations.

3. 6 central blocks: fixed and immovable.

1.Preparation of the Rubik's Cube: Mess up the triangle cube and reduce it to three triangles with different colors on the faces.

2.Step 1: Restore and homing the edges. The edge is a small piece of the Rubik's cube with different colors on the two sides, and the corresponding edge is restored to the correct position by rotating the Rubik's cube.

3.Step 2: Restore and homing corner blocks. Corner tuckle tremor refers to three small pieces of the Rubik's Cube with different colors on the surface, and the corresponding corner blocks are restored to the correct position by rotating the Rubik's Cube.

4.Step 3: Crack the complexion.

The three face colors are respectively white, red, blue and green in the middle color, by turning a colored edge to a certain position, and then rotating the same color edge to the bottom, and then through a series of shifting and rotation steps, the colored edge is returned to its original position. Sky Clan.

5.Step 4: Restore the last side. Revert the last unrestored face to restore the entire Rubik's Cube to its original state.

6.Note: The sequence of operations, fingering, and timing are very important and need to be mastered through repeated practice.