The seven-step reduction method of the third-order Rubik's cube is usually referred to:"Layer-first method", which is a restoration method that is suitable for beginners to learn. Here are the brief steps and mantras for the seven-step reduction method:
White Cross: Start by making a white cross on the top layer.
Formula: Find the white center and rotate the top layer until the white edge matches the center.
Restore the top white corner block: Place the white corner block on the top surface in the correct position.
Formula: Find the corner block with white color, rotate the top layer until the corner block aligns with the top surface, and then rotate the top layer 180 degrees.
Middle Edges: Restore the four edges of the middle layer.
Formula: Find the middle edge, rotate the middle layer to align it with the top color, and then rotate the top layer.
Bottom Cross: Complete a cross on the bottom side.
Formula: Look for the color of the underside and rotate the underside until a cross is formed.
Restore Bottom Corner Block Position: Place the bottom corner block in the correct position.
Formula: Observe the color of the bottom corner block and rotate the bottom surface until the corner block color matches the center.
Adjust the orientation of the bottom corner blocks: Rotate the bottom corner blocks so that the front color of all corner blocks matches the color of the center block of the face on which they are located.
Formula: Rotate the bottom surface, observe the color of the corner blocks, and rotate until all the corner blocks match the color.
Finally, adjust the orientation of the edges: Through a series of formulas, adjust the direction of the edges until the entire Rubik's cube is restored.
Formula: Memorize the formula and rotate them in turn until all edges are in the right direction.
These steps and formulas are the basic framework for the seven-step reduction method of the third-order Rubik's Cube. In practice, it is also necessary to memorize some specific formulas and techniques to improve the speed and efficiency of restoration. Rubik's Cube reduction is a hands-on and brain-based process that requires patience and practice. As you become more proficient, you'll learn more advanced restoration techniques and methods.