How many situations are there for a second order Rubik s cube, and why is a second order Rubik s cub

The official English name of the second-order Rubik's Cube is Pocket Rubik'S cube or mini cube, literally translated in Chinese is called "pocket cube". It has two squares on each side, and the official version has a side length of 40 mm, and the other shaft-type second-order Rubik's Cube developed by Dongxian is 50 mm. The total number of changes in the second-order Rubik's Cube is 3,674,160 or approx.

The second-order Rubik's Cube (Pocket Cube), also known as the Pocket Cube, Mini Rubik's Cube, Small Rubik's Cube, and Ice Cube Cube, is a cube structure of 2 2 2. There are only 8 corner blocks in itself, and there are no other structural blocks. The structure is similar to that of the third-order Rubik's Cube, and it can be restored by the formula of restoring the third-order Rubik's Cube.

A second-order Rubik's Cube is no more difficult than a third-order Rubik's Cube. Those who feel that the second order is more difficult than the third order either don't know the Rubik's Cube, or they just start to learn the illusion.

For people who don't know the Rubik's Cube, the factor that will find the second order more difficult is that he thinks that the third order difficulty is 10, and the actual difficulty of the third order is 10, which is in line with the impression. And when he picked up the second order, he intuitively thought that the second order difficulty was 1, but in fact, the actual difficulty of the second order might be 5. So he felt that the second order was so difficult, maybe in his impression, the second order was more difficult than the third order.

Main colorways:

1. Japanese color matching.

The Japanese color scheme is the color scheme when Professor Rubik first developed the Rubik's Cube, which are white, red, orange, yellow, green, and blue, of which white and blue are opposite, red and orange are opposite, and yellow and green are opposite, and the blue, orange, and yellow colors are arranged counterclockwise. After the Rubik's Cube was spread around the world, the Rubik Company listened to the opinions of color researchers and changed the color scheme, but Japan kept the original color scheme.

2. Official color matching.

Rubic listened to the opinions of color researchers, and arranged the colors on both sides of the opposite side into the same color system, that is, white and yellow, red and orange, blue and green, and the blue, orange, and yellow colors were arranged clockwise. That is, the international standard color matching of yellow on the top and white on the bottom, blue on the front and green on the back, orange on the left and red on the right.

3. V-Cube Company.

The V-Cube color scheme is similar to that of Rubik, except that white is replaced by black, i.e., black and yellow, red and orange, and blue and green, and blue, orange, and yellow are arranged clockwise.

Second-order Rubik's Cube formula: one to the left (r'frf')(ru2r')u(ru2r');One backwards r'fr'f2(ru'r')f2r2;One to the right R2'f2(rur')f2rf'r;Diagonally for r u' r' u' f2 u' r u r' u f2 r u r' f2 r f' u r' f2 r f'r (optional). Two backwards (r2u'r2')u2'f2u'r2;Two forward-facing R2U'b2u2'(r2u'r2')。

The essential formula for the second-order Rubik's Cube:

1. Cllcase

1. One to the left (r'frf')(ru2r')u(ru2r');

2. One backward r'fr'f2(ru'r')f2r2;

3. One is facing right R2'f2(rur')f2rf'r;

4. Diagonally for r u' r' u' f2 u' r u r' u f2 r u r' f2 r f' u r' f2 r f'r (optional).

2. eg1case

1. Two backwards (R2U'r2')u2'f2u'r2;

2. Two forward-facing R2U'b2u2'(r2u'r2')。

The second-order Rubik's Cube has only 8 corner blocks, which can be restored using part of the principle of the "third-order Rubik's Cube layer first method".

Phase 1: Restore the top layer.

Stage 2: Flip the bottom corner blocks to align the bottom colors.

The third stage: adjust the position of the bottom corner block and the restoration is completed.

The second-order Rubik's Cube, also known as the pocket Rubik's Cube, mini Rubik's Cube, small Rubik's Cube, and Ice Cube Cube, is a cube structure of 2 2 2. There are only 8 corner blocks in itself, and there are no other structural blocks. The structure is similar to that of the third-order Rubik's Cube, and it can be restored using the formula of the third-order Rubik's Cube.

Play the color of the first layer consistently, and make the color of the side of the first layer the same as the color of the side of the Rubik's Cube 4.

The second level of formulas: upward straight - right straight - upward reverse - right reverse - upward reverse - forward reverse - upward straight - forward straight.

The third level of the formula (starting cross): right reverse - upward reverse - forward reverse - upward straight - forward straight - right straight.

The third layer of the formula (four-corner block): right shun - upward shun - right reverse - upper shun - upper 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 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! :Clockwise: Ninety degrees clockwiseReverse: Ninety degrees counterclockwise.

Second-order Rubik's Cube: The more common type of Rubik's Cube.

There are two scenarios.

One is that the corner block to be homed is below the one to be homed, just press ri di r d

The third-order corner block formula, the third-order top-level formula. Will it be third-order? Don't make the cross, just put the corner block.

When the third order as long as you know the third order.

When the third-order Rubik's Cube comes to play, it is enough.

No need to change edges, no need to erect crosses.

Second-order Rubik's Cube restoration tutorial.

The essential formula for the second-order Rubik's Cube:

1. Cllcase

1. One left-facing (R frf) (ru2r)u(ru2r)2, one backward-facing r fr f2(ru r)f2r23, one right-facing r2 f2(rur)f2rf r4, diagonally to r u' r' u' f2 u' r u r' u f2r u r' f2 r f' u r' f2 r f'R (optional) 2. eg1case

1. Two backward (r2u r2) u2 f2u r22 and two forward r2u b2u2 (r2u r2).Extended MaterialsThe second-order Rubik's Cube has 8 corner blocks with 8!24=1680 kinds of position arrangement, each arrangement has 1107 color directions (color direction is conserved in twisting, and most of the theoretical color directions of 3 to the 8th power are not possible), that is, the second-order Rubik's Cube is scrambled and has a total of (8!3^7)/24=7!

3 6 = 3674160 states.

The farthest recovery distance of the second-order Rubik's Cube (i.e., the state that most requires the most steps of recovery) is 11 full rotations, or 14 normal rotations, which can be calculated by a computer using an exhaustive algorithm.

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.

Since the second-order Rubik's Cube does not have a central block as a reference, it is assumed that it has a central block, and a corner block with white is randomly found, and the white side is placed downward, at this time, it is assumed that the direction of the white side is white, and the color of the white side is yellow.

Second-order Rubik's Cube Tutorial: White layer, learning the Rubik's Cube has never been easier.

<>1.The second-order Rubik's Cube doesn't have a central block, so we can just find a noodle ridge with white corners to make trouble.

2.We use the third-order Rubik's Cube to find neighbors to restore the two corner blocks, and after that, check whether the restored corner blocks are of the same color below.

3.In the same way, restore a corner block to the canopy. Once you've finished the top surface, the next step is to find the finished surface and face yourself.

Once you find it, face yourself with the face of the completed Nosun, and then follow the mantra in the picture to complete the six sides. If you can't find the finished face, just find a non-white and yellow face in the picture.

4.And so on, put the remaining corners together and check if the white corners are of the same color underneath. After the mantra is successful, you will find that the second-order Rubik's Cube has been restored.

The gameplay of the second-order calendar cube is divided into three steps, namely:

1) Restore the bottom corners;

2) Restore the color of the top surface;

3) Adjust the top corner blocks.

1) Restore the bottom corners;

2. In this step, we need to restore the 4 corner blocks of the bottom rock core, which is very simple, just need to remember a rough digging algorithm, assuming that with white as the base, the white block will only have 5 positions, and these positions are either symmetrical or easy to become the front position.

3. Let's take an example, as shown in the figure above, the adjustment of the first situation can be completed in only three steps.

4. For the second case, it is completely symmetrical with the first case, and the algorithm is also symmetrical.