7x7 Cube Solver ❲Fully Tested❳

The 7x7 cube is a "big cube" in the WCA (World Cube Association) family, though it is no longer an official event (replaced by 6x6 and 7x7 is still popular in competitions unofficially). It has 218 center pieces (6 colors × 36 center pieces each, minus the fixed center? Wait, let's be precise: a 7x7 has 7×7 = 49 stickers per face, but the center pieces: each face has a 5×5 array of moveable centers = 25 center pieces per face, total 150 moveable center pieces. Plus 60 edge pieces (5 per edge × 12 edges) and 8 corners. Total pieces = 218, but centers are the majority.)

You need to build a 5x5 block of color on each of the 6 faces. The Technique: Instead of placing pieces one by one, build 7x7 cube solver

3L' U2 3R U2 3L U2 3R' U2 – cycles edge pieces. The 7x7 cube is a "big cube" in