How to restore the 3rd order Rubik s Cube, how to restore the 3rd order Rubik s Cube?

It's been a long time since I've spelled a Rubik's Cube, and today someone suddenly asked, so let's talk about it. (My best time is 1 minute 15 seconds).

The first layer: The first layer is self-taught, and it is very simple. Let's not talk about it.

The first layer and the first side are put together synchronously.

Second layer: Place the full side side down. Then align the middle of the second layer with the first layer to form a small inverted T-shape. Realign the middle of the third layer.

If the front is blue, the left is green, and the right is yellow. At this time.

The middle of the second and third layers is blue. The third layer is green above.

Use the left-shift formula: up-left-up+left+up+front+up-front-(up, down, left, right, front and back.) + refers to 90 degrees clockwise, - is the opposite, 2 fingers to 180 degrees).

If the front is blue, the left is green, and the right is yellow. At this time.

The middle of the second and third layers is blue. The third layer is yellow on top.

Use the right-shift formula: Up+Right+Up-Right-Up-Front-Up+Front+

When the second layer appears, the right side of the front is yellow. The second layer on the right and the left are blue with shortcut formulas.

Quick formula: Right + Up 2 Right - Up + Right + Up 2 Right - Up + Front - Up - Front + +

And so on, put the second layer together.

Third layer: After the second layer is put together. There will be 4 situations on the top surface (we will spell the word "ten" on the top surface next):

1.There is only one top color in the middle. Use the cross formula over and over again. Appearance 2

2.The top surface forms a top color. Turn the top face to turn the line into a vertical line. Use the cross formula again. Appearance 3

3.The top surface forms a right angle. One side up, the other side down. Use the cross formula again. Appearance 4

4.A "ten" word (needless to say in this case).

Cross formula: right-up-front-up+front+right+

Then the color. (The third layer is the same color as the side).

Color matching formula: right-up-right + up-right-top 2 right + top 2 Effect: The color of the top layer on the left remains unchanged. The remaining three sides of the middle color rotate counterclockwise.

until the color is the same in the middle of the four sides.

After the top cross is put together. Here are three formulas to spell out the top surface:

1.Left + Right - Up - Right + Up + Left - Up - Right - Up + Right + Effect: The top right corner of the top surface does not move. The lower right corner flips to the top of the upper left corner, the upper left corner flips back to the bottom left corner, and the lower left corner pans to the lower right corner.

2.Front + Right - Front + Left 2 Front - Right + Front + Left 2 Front 2 Effect: The top right corner of the top surface does not move. The rest of the triangles are translated counterclockwise for one round.

3.Left + Right + Up 2 Left - Right - Back + Front + Up 2 Back - Front - Effect: It's hard to say, just use it once after the six sides are good (this is also a shortcut formula).

The third-order Rubik's cube needs to rely on the mantra to restore:

Clause. 1. Make a white cross;

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

Clause. 3. The second formula: right, up, right, up, right, right, up, right

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

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

2. After putting together, the color corresponding to each section of the cross must be consistent with the color of the middle of the other faces, which is the key.

Question: I've finished the white face.

4. The three colors of each side of the second layer must be the same.

5. Spell the top cross, and the color corresponding to each section of the cross is the same as the second layer of each face.

6. Assemble one corner of the top layer, and the color of the finished corner is the same as the color of the three sides. The Rubik's Cube was restored successfully.

Asking questions doesn't spell ......

Thank you for asking questions.

Turn the white surface into the word "ten", then restore the four edges and corners, restore the white surface, and form an inverted T shape with the center of the middle layer, turn the white to the bottom surface, according to the formula: uru'r'u'f'uf or u'f'ufuru'r'Align the second layer of edge blocks;

Then press the formula frur'u'r'The top layer is made of yellow crosses, and then the formula lul is used'ulu2l'or r'u'ru'r'u2r makes the yellow corner block adjust around the cross, and finally uses the formula f2'ulr'f2rl'uf2 just adjust the color blocks on the edge to the corresponding positions.

Note that when moving the yellow corner around the cross in the penultimate step, if it is out of touch with the color block on the side, you can use the formula ru2r'u'ru2l'ur'u'l Position the yellow block. If it doesn't work once, you need to repeat it a few more times.

The third layer of the formula (from the cross): right reverse - upward reverse - forward reverse - upper shun - upper shun - the third layer of formula (four corners): right shun - upward shun - right reverse - upward shun - upward shun 180° - right shun - right reverse - right shun.

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

The third level formula (also centered): right straight - upward reverse - right straight - up straight - right straight - upper shun - right straight - lower reverse - right reverse - upper reverse - right 180°

Concentrate! :Smooth: Ninety degrees clockwise.

Inverse: Ninety degrees counterclockwise.

There are many ways to reduce the third-order Rubik's cube, and the most suitable method for beginners is called the "layer-first method", which is also the method with the least formula. In addition, there are angle first method, edge first method, bridge method, CFOP, CFOP, CFOOP, etc., which can be used for the restoration of the third-order Rubik's Cube.

The first step of the layer-first method is to first restore the round lead of the edges on the top layer, turn out the cross shape of the top square, and then restore the edges of the top layer, and the color blocks of the entire top layer are all restored. The next step is to restore the color block of the middle layer, don't worry about disrupting the color block of the top layer in this process, after turning the middle layer color block, the top layer color block will naturally recover.

The fourth step is to restore the edges of the bottom layer, turn out the cross pattern on the bottom layer, and then reverse the corner blocks of the bottom layer to turn all the color blocks of the bottom layer over. At this time, although all the color blocks on the bottom side have been returned to their positions, the color of the circle around the bottom color block has not been completely restored, and then appropriate adjustments are made to restore the position of the bottom corner blocks to complete the restoration of the entire third-order Rubik's Cube.

Generally, the racing gameplay is based on the CFOP method, which is restored in order from bottom to top, first the bottom layer, then the middle layer, and finally the top layer. This method appears more often and is more complicated to play.

The steps of the third-order Rubik's Cube tutorial 1 7 are as follows:

1. Know the Rubik's Cube: The third-order Rubik's Cube has six sides and six different colors of Yan Min's luggage, and each side has a central block, which will determine the color of this side after restoration. The center block is next to the four corners, and the position of the four corners of the Rubik's cube is four corners.

2. A layer of cross: first choose a color (the color of the center block) and restore the four edges on this side. After restoration, the other side of the four edges should correspond to its center block, and the specific method:

Find a correct color, upper left, lower left, lower left (right hand) (this method is only applicable to one color correct, or two opposite faces with the correct color, if there are two adjacent faces with the correct color, you need to adjust to only one color is correct, if it doesn't work once, do it several times).

3. Restore a layer: Flush the cross down, find the corner block containing the color in the Rubik's Cube and observe the other two colors, find and rotate to the corresponding center block, formula: n times up the left and the bottom right (right hand) until the restoration layer (if the edge is in the bottom layer of the belt, then do it again, go up, left, down, right, and then find the corresponding center block).

4. Restore the second layer: find the edge that does not contain the color of the center block of the top layer (such as: does not contain red), then rotate the top layer until it turns to the center block of the corresponding color, and then observe the color of the edge of the top layer, find the center block corresponding to the color, if it is on the right, then do the right-hand formula (upper left and lower right), and then do the left-handed formula again (upper right and lower left); If you are on the left, make the left-handed formula first, then the right-hand formula.

If all the edges in the top layer contain the color of the center block, you need to find the wrong color from the second layer and do a left and right hand formula.

5. Restore the three-layer cross: formula: open the door, open the door, lower left, lower right, lower left and close the door.

Placement: (only look at the edges) if the three layers only have a correct color of the central block, then place it arbitrarily; If the correct color is at right angles, it will be in the direction of nine o'clock; If it is in the shape of a "one", it will swing horizontally, and only do it once on the top, left, bottom, and right. Then restore three layers of large crosses, and see one layer for the restoration method.

6. Three-layer full face: formula: lower left (right hand) lower right (left hand) upper left (right hand) upper right (left hand) placement position:

Place it in the top left with one more correct color, and put it in front of the top left corner of the cube with two more correct colors. If you can't do it once, do it several times.

7. Restore the Rubik's Cube: open the door (left hand), lower left (right hand), lower right (left hand), upper left (right hand), upper right (left hand), and close the door (left hand) position; If the four corners of the top layer are all wrong, they can be placed at will. If there is a correct one, put it in the bottom right corner.

Again, it needs to be done many times.

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 of the right side.

T1: Front + Up + Front + Front + 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 Top Front + 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 ruler 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 -u-r2

t8: (clockwise) r2u+r+u+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=the above coincidence; d=Bottom.