How long does it take for the Rubik s Cube to be restored using the 7 step restoration method?

2 minutes 33 words.

The technique is a little proficient, and the formula muscle memory reaches the level of handy, and then improves the level of observation, which thinks more and summarizes.

Wait for you to get 2 points, pay attention to the fingering, practice fingering, and understand the formula? rur'u'Repeat six times.

The top layer is flicked with your index finger, not with the palm of your hand.

On the basis of formula proficiency, you can free your eyes to observe the next step while you are working on the formula.

Wait for you to get a point, I recommend you to learn CFOP, if you don't understand it, of course, the advanced solution of the Rubik's Cube is not only this, and domestic masters are more common.

But one point further, first of all, your Rubik's Cube must have a good smoothness **On the Rubik's Cube, you can buy a copy of the national armor is only RMB

The limit of the seven-step reduction method is 20 seconds, and the CFOP domestic record is sub 9 seconds.

Take the 2nd order Rubik's Cube as an example:

1. First restore the bottom corners: this step is to restore the 4 corners of the bottom layer.

2. Use algorithm 1 to the right for white, turn to the right first, r u r2 r u r2.

3. Use algorithm 2 for white forward, turn the front first, f2 u2 f u f2 u2 f.

4. Repeat 4 corner blocks, and you can do a good job of the bottom layer.

5. Then restore the top color: this step is to restore the color of the top surface of the 4 corner blocks.

6. Situation 6 is to use formula 2-2 first, in other cases use formula 2-1 first, and in other cases, use the formula 2-1 first.

7. Then restore the top layer of the corner block: if there is a situation similar to Qiaoda's wisdom, rotate the corner block of the same color to the position facing you.

8. Use this algorithm again: r b2 r f2 r2 b r f2 r2 r2, and you can complete the restoration.

The seven-step reduction method of the third-order Rubik's cube is diagonal.

1. It is necessary to restore the four corner blocks, and the following three situations will generally be encountered, which will be solved according to the method on the way.

3. To restore the second layer, there will be two situations, one left and one right.

4. To build a top cross, you only need to remember a formula here: f r u r' u'f'。You can build a top cross.

5. It is to restore the top layer, a total of seven situations.

6. Adjust the order of the edges and blocks of the top corner blocks, and these four situations will be encountered.

7. In special circumstances, if you do not encounter these four situations, you need to forcibly adjust the positive and false sales and transportation Rubik's Cube to the above four situations according to the steps in the lifting and burning diagram.

Rubik's Cube Formula Formula 7 Step Formula:

The formula for the first case is: (up, right, up, right, right, up

2. Right Shun, Shang Shun, Right Reverse, Shang Shun, Right Shun, Shang Shun, Shang Shun, Right Reverse.

3. Ascending, righting, reverse, reverse, reverse, reverse, reverse, up

4. Right reverse, downward reverse, right shun, lower shun.

Repeat multiple times.

The last step of the Rubik's cube formula: adjust the position of the top side block to make it return to its position, using the three-cycle method, that is, the left, front, and right, the top 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-、r2。

t8: (clockwise) r2, u+r+, u+r-, u-r-, u-r-, u+r-.

Rubik's Cube Formula: R: Turn on the right side.

m: Separate turn in the middle.

L: Turn left.

u: Top-level turn.

d: Bottom turn.

F: Turn to your side.

Add ' after the letter to represent counterclockwise turning, lowercase letters to represent double-layer turning, and add 2 after letters to represent two turns of 180 degrees (e.g., u2=u+u). Note: Turning the Rubik's Cube twice counterclockwise is the same as turning it twice clockwise.

Rubik's Cube Restore Steps:Restore the bottom cross, flip the Rubik's cube, take the bottom layer as the top layer, find the desired edge, turn to the required position, and the rotation of the bottom layer in the process of spelling the cross has no effect. Restore the bottom corner block, when restoring the corner block, first find the required corner block at the bottom, if you don't go to the top layer to find it.

Restore the middle edge and flip the entire cube face down. Restore the top layer cross, restore the top layer edge, make the top layer corner block move to the correct position, and ensure that the color position is correct.

The top layer corner block is in place, restore the top layer corner block, the last step is very simple, but it is also easy to make mistakes, the next two layers will be messy in the process, don't worry, four steps and a cycle must be completed.

1. The first step of the Rubik's Cube restoration:

The bottom edge is in place, choose the white side as the bottom surface, and set a cross on the bottom layer of the Rubik's Cube. The reduction edge is to spell out a cross on each surface, and the cross is not according to the surface, but according to the layer. Return the first layer first, that is, spell out a cross on the first side.

This is very simple, but the cross must be spelled correctly, that is, the color of the four edges of the cross must be consistent with the color of the center block of the front and back, left and right.

2. The second step of the Rubik's Cube restoration: the bottom corner is to restore the four corners of the first layer of the Rubik's Cube.

3. The third step of the Rubik's cube restoration: the second layer of edges is the step of restoring the four edges in the middle layer of the Rubik's cube.

4. The fourth step of the Rubik's Cube restoration: the top edge position, when doing this step, it depends on what the situation of the Rubik's Cube in your hand is, such as the "point": after doing this action step, it is a "small turn", then you must adjust the top layer to the correct direction and then do this step, and so on, until the top layer of yellow is restored to a cross The fourth step of the Rubik's Cube is completed.

5. The fifth step of the Rubik's Cube restoration: the top corner of the surface position, that is, the top surface color of the four top corners of the Rubik's Cube is adjusted to the top surface.

6. The sixth step of the Rubik's Cube restoration: the top edge is home, so that the color of the other side of the four top edges of the Rubik's Cube is the same color as the color of the other four sides where it is located. Step 6 of the order of the four corners of the top layer of the Rubik's Cube is completed.

7. The seventh step of the Rubik's Cube restoration: the top corner is to make the other two sides of the four top corners of the Rubik's Cube that have been placed in the same color as the color of the corresponding face.

4-step advanced gameplay, but I don't.

Explanation and demonstration of the steps of the third-order Rubik's Cube restoration.

It takes 23 steps, and the world record is 28 steps to return to the wilderness and sell the original with the least number of steps: the most difficult old wheel gameplay, in this kind of gameplay or competition, you can't turn the Rubik's Cube, you can only use your eyes to observe the state of the Rubik's Cube, and then think of the least number of steps to solve the Rubik's Cube. Although no one has yet been able to prove what the maximum state of the Rubik's Cube is (i.e., the state that needs to be restored with the most steps), it is generally believed that after 50 steps of irregular scrambling, the Rubik's Cube can reach its maximum state at the third level, and it takes 23 steps to restore it in this case.

The current record for the world song is 28 steps to restore.

1.First, the side with the white block in the middle (the one with the rubiks logo) is facing the top, and then make a white cross at the top, that is, the blocks of other colors are in the corresponding position (small complex, see the diagram, pay attention to the mantra marked above, do it correctly).

2 Then it's time to put the white corner blocks back in place (the cheats are very complicated, or it's easier to understand by looking at the picture).

3 Then let the middle edge block be homed. Turn the white side downward, find the red and green edge blocks, if the red and green edge blocks are on the top layer, then rotate the top layer in a clockwise direction until the side blocks are the same as the one on the Song Elimination diagram, and then turn the Rubik's Cube according to the formula to return the side blocks to their positions. If the red and green edge blocks are in the middle layer, but the position or color is wrong, first make the red and green edge blocks in the front right position, and then rotate them again in the order of one of the next trillion faces.

4 Then adjust the top (which should be yellow) side block upwards to make a yellow cross. If the yellow cross does not appear on the top layer after 1 rotation of the formula, you can repeat the rotation until the yellow cross appears.

5 Then adjust the yellow corner blocks around the cross, which is a bit difficult, just look at the formula.

6 Usually at this time, the yellow block and the color of the side will be misaligned, according to the mantra (I haven't read it yet) to position the yellow block at the four corners.

7. Finally, adjust the color blocks on the edge to the corresponding position of the wild guess. Succeed with flying colors!! Get excited.