The third-order Rubik's Cube, also known as the Rubic Cube, is a popular intellectual toy. It is very important for beginners to learn a simple yet effective restoration method. This article will introduce in detail a third-order Rubik's Cube reduction method known as the "layer-first method" to help you easily master the Rubik's Cube restoration skills.
1. Understand the structure of the Rubik's Cube
Before we begin the restoration, we need to understand the structure of the third-order Rubik's Cube. The third-order Rubik's Cube consists of 26 small squares, including 6 center blocks, 12 edge blocks, and 8 corner blocks. Among them, the center block is fixed, the edge block can be moved in two directions, and the corner block can be moved in three directions.
2. Restore the underlying cross
Choose a color you like as the base color, then find the 4 center blocks of that color.
Place these 4 center blocks on the bottom layer to form a cross shape. This step can be done by rotating the upper layer of the Rubik's Cube.
3. Restore the bottom corners
Observe the color of the bottom corner block and find one that has both the bottom and upper colors.
Move this corner block to the top layer so that it aligns with the corresponding color of the top layer.
Use "r u r'Or" l' u'L" (R represents 90 degrees clockwise rotation on the right, U represents 90 degrees clockwise rotation on the top, and L represents 90 degrees clockwise rotation on the left) to restore the corner blocks to the bottom layer.
Repeat the above steps until all the underlying corner blocks have been restored.
Fourth, restore the middle layer of the edge
Observe the color of the middle layer of the edge and find a edge that has both the middle color and the upper color.
Move the edge to the top layer so that it aligns with the corresponding color of the top layer.
Use "r u r' u'Or" l' u'l u", restoring the edges to the middle layer.
Repeat the above steps until all the mid-layer edges have been restored.
Fifth, restore the top layer of the cross
Align the color of the top corner block with the top color to form a top cross.
If the top corner is already aligned with the top color, simply adjust the position of the top edge.
6. Restore the top corner block
The restoration method of the top corner block is similar to that of the bottom corner block. First, look at the color of the top layer corner block and find a corner block that has both the top and middle colors.
Move this corner block to the top layer so that it aligns with the corresponding color of the top layer.
Use "r u r' u' r u2 r'Or" l' u' l u l'u2 l", which restores the corner blocks to the top layer.
Repeat the above steps until all the top corner blocks have been restored.
7. Restore the top edges
The final step is to restore the top edges. First, look at the color of the top layer of the edge and find a edge that has both the top and middle colors.
Move the edge to the top layer so that it aligns with the corresponding color of the top layer.
Use "r u r'u" (clockwise) or "l' u'l u" (counterclockwise) to restore the edges to the top layer.
Repeat the above steps until all the top edges have been restored.
Through the above seven steps, you have successfully mastered the method of restoring the third-order Rubik's cube by the layer-first method. This method is simple and easy to learn, making it suitable for beginners to get started. As you become more proficient in the Rubik's Cube, you can also try other, more advanced restoration methods, such as the CFOP method. Have fun in the world of Rubik's Cube! February** Dynamic Incentive Program