How to restore a triangular cube

How to restore the triangle Rubik's cube is introduced as follows:

1, the bottom edge is in place.

Also known as bottom frame crossing, the process of correctly repairing four bottom edges.

2. Bottom reduction

The relative position of the prism with white as the bottom surface is wrong, so the following rotation is needed: f ur' u' f' (the correct direction rotates 90 degrees clockwise), and the corresponding error is 180 degrees by using a formula.

3. Intermediate layer reduction

Restoring the middle layer means that the remaining top edge blocks are in the correct position, and the remaining top corner blocks and middle layer edges are in the wrong position. The following rotation is required: the two corner blocks in the middle of the top edge block should turn to the direction of 12. Formula: U R U' R' U' F' U F If the two corner blocks in the middle of the top edge block are to be turned to 6 o'clock. Formula: u 'l 'u l u f u 'f.

If the two corners in the middle of the first three corners are not at 12 and 6 o'clock. Formula: M U M U M U M U M U M U M u m

4. Top crossing

The relative position of the square on the edge of the white cross is correct, just rotate it as follows: F R U R' U' F'.

5, top surface reduction

Restore the top corner block and leave the top corner block in the wrong position. Formula: R U R' U R U2 R'.

6, the top intermediate process

Restore the edge block in the middle of the top layer, leaving the relative position of the edge block at the top layer wrong. Formula: m2 u m u2m' u m u2m' u m' u m' u m' u m' u m' u2m'

7. Top reduction

The top floor is completely restored, and the relative position of the corner block at the top floor is still wrong. Formula: R2 u r u R2 u' r' (u') R2.

Brief introduction of triangular cube

1, inventor

2 Uwe Mèffert is a famous German inventor and inventor of Rubik's Cube. He invented the Pyramid Cube at 1970. Maifeite was born in 1939, and was educated in Heidelberg, Germany, Geelong, Australia and Berne, Switzerland. Professor McFett accidentally invented the Pyramid Rubik's Cube while studying the pyramid energy model.

4. Definition

Triangle Rubik's Cube (also known as "Pyramid Rubik's Cube") is a tetrahedral Rubik's Cube. The first Rubik's Cube in the world was invented by German scientist Professor Maifeite in 1970. It is shaped like a regular tetrahedron. It has four faces, each of which is a triangle. In the process of reduction, it doesn't have a central block like the third-order Rubik's cube, so the reduction method is much simpler than the third-order Rubik's cube.