Build the first center
Use the fixed center as an anchor. Form three 1×3 bars and join them into a complete 3×3 center.
A clear 5×5 reduction guide: solve the 3×3 centers, build three-piece edges, then finish with the 3×3 method.

The fixed center on each face identifies its color, making the color scheme easier to preserve than on a 4×4.
Use the fixed center as an anchor. Form three 1×3 bars and join them into a complete 3×3 center.
Solve the opposite color and keep it across from the first. Then complete the four side centers.
Match one wing to the middle edge, add the second wing, then store the completed group in a safe layer.
Temporarily open a solved edge, pair the final two edges, and restore the edge you opened.
Treat every center block as one center and each three-piece group as one edge. Continue with the regular 3×3 method.