4-Edge Flip — 7 × 7 Parity Algorithms

4-Edge Flip

4-Edge Flip

(3Rw U2) x (3Rw U2 3Rw U2) (3Rw' U2 3Lw U2) (4Rw' U2 3Rw U2) (3Rw' U2 3Rw')

All 7 × 7 Parity cases

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