The 4x4 Rubik’s Cube adds a layer of complexity and a new set of challenges compared to the classic 3x3. A 4x4 Rubik's Cube, also known as the Rubik's Revenge.

As the name suggests, the 4x4 cube has 4 layers, which equates to 4 squares on each face, making it a 4x4x4 structure. It has 56 smaller cubelets (16 center pieces, 24 edge pieces, and 16 corner pieces). Unlike the 3x3 cube, the 4x4 cube doesn't have fixed center pieces. Instead, there are 24 center pieces that can move around.

This is the most common solving method for the 4x4 is where the 4x4 cube is reduced to a state similar to a 3x3 cube by solving the centers and pairing edges before solving it as a 3x3, but with additional steps to address the unique challenges of the 4x4, such as handling parity errors.

#### Steps to Solve

**Solve the Center Pieces:** Since the center pieces can move around, the first step is to solve the centers on each face so that each face has a uniform color in the center.**Pair the Edge Pieces:** After the centers are solved, the next step is to pair up the edge pieces. This involves aligning the edge pairs so that each edge piece is correctly paired with its counterpart.**Solve Like a 3x3 Cube**: Once the edge pieces are paired, you can solve the cube using methods similar to those used for the 3x3 cube.**Fix Parity Errors:** After solving, if you encounter any parity errors (where two pieces are incorrectly swapped or flipped), you’ll need to use specific algorithms designed to correct these errors.