Zongzi Rubik's Cube will use formulas as long as it finds its cross. Zongzi Rubik's Cube can be solved by third-order solution. As long as you find out where the cross of Zongzi Rubik's Cube is, you can turn it. This picture is the upper and lower trapezoid I found. The left and right trapezoid plus the center (two small triangles) is his cross trapezoid, which is equivalent to a third-order prism. Four-color zongzi reduction method:

The first step is the bottom crossing.

Key points: ① The method is the same as the third-order Rubik's cube, regardless of the direction of trapezoidal blocks (also called edge blocks and edge blocks).

(2) At the same time, pay attention to the large angle block, and its direction also needs to be correct.

Step 2: Restore the second layer (F2L)

Key points: (1) Observe the position of the center block on the second floor, and determine the positions on all sides regardless of the direction.

(2) according to the third-order method to place the trapezoidal block, regardless of the direction.

Step 3: Return to the top corner block.

① counterclockwise triangle transformation: x' (r u x' (r u r) d2 (r u r) d2r2.

② clockwise triangle change: x' R2 D2 (R' U' R) D2 (R' U R')

(3) Diagonal change (changing the left rear edge block at the same time): f (r u' r u') (r u' r u') (r u' r u') (r f r f')

④ Change of adjacent angles (change of left and right side blocks at the same time): (r u r r r u') (r f) (r 2 u r u r f).

Step 4: Turn the top corner color.

Key point: Place the vertex angle to be changed into color at the lower right of the U-plane. This step can also be carried out after the fifth or sixth step.

① The formula for rotating the vertex angle clockwise by 90 degrees is (r r' d' r d) × 2 u' (r' d' r d) × 4 u

② The formula of 90-degree counterclockwise rotation is (R' D' R D)×2 U (R' D' R D)×4 U'

③ Make the two large corners of the U-plane turn 90 degrees counterclockwise at the same time (actually, the four corners turn 90 degrees at the same time);

(R&D) ×2 U (R&D )×2 U (R&D) × 2U (R&D )× 2U2

(4) Make the two large corners of the U-plane rotate 90 degrees clockwise at the same time (actually, the four corners rotate 90 degrees clockwise at the same time);

(R ' D ' R D)×2 U '(R ' D ' R D)×2 U '(R ' D ' R D)×2 U2

Step 5: Return to the trapezoidal block (position recovery, regardless of direction).

① ① The counterclockwise triangle transformation formula of ①①PLL: (r u' r) (r u) r u' r) (r u' r) (r u r) R U' R)(U R U R)(U' R' U'R2 R2).

(2) ② The formula of clockwise triangle transformation of PLL is (R2u) (R U U') (R U') (R U R').

③ Cross-edge conversion formula of ③PLL top surface M2 U M2 U2)( M2 U M2)

Step 6: Turn right in the direction of trapezoidal block.

Important: (1) All formulas should be used, and special attention should be paid to the operation of x y x y'.

(2) When Formula ① is used, place the T-shaped block to be straightened at the front and rear positions of the center block of the U-plane.

(3) When Formula (2) is used, place the T-shaped block to be straightened at the right and front positions of the center block in the U plane.

①:(R U R ' U ')R(R ' U R U ')R ' y(R2 U)(R U R ' U ')(R ' U ')(R ' U R ')y '

②:R(U R ' U ')R '(R U R U ' R ')y(R U ' R)(U R U R)(U ' R ' U ' R2)y '

Step 7: Turn right in the direction of the center block.

① Turn the U plane counterclockwise and the F plane clockwise: (u d l 'r f 'b) u' (f b 'l r 'u d') f.

② turn U' D L' R F' B) U (F B' L R' U D' )F clockwise and counterclockwise on the u plane.

③U plane and F plane rotate at the same time 180 degrees: (U' D L' R F' B) U2 (F B' L R' U D') F2.

④ The rotation of a single center block is 180 degrees: (L R U2 L' R' U) ×2.