The Professor's Cube

X. Solve the Middle and Bottom Faces

Swap the Outer Faces:

The end is near. Use either of the four moves below to place an outer-face from the bottom layer to one of the vertical sides. You may have to rotate the bottom layer first to get everything set. Do not attempt to solve an entire side at a time; just keep climbing a center face somewhere from the bottom side to its proper side. What happens to the square that it lands on? It gets sent down to the bottom layer, so each of these four moves can also be used as knock-downs.

M- B+ O- B- M+ B+ O+		O- B- M- B+ O+ B- M+		M- B- O- B+ M+ B- O+		O- B+ M- B- O+ B+ M+

Hint: try not to knock down any center face that has the same color as the bottom face. If you do, then the bottom face will fill up and force you to do more knock-downs later on, which is unnecessary.

Shortcut: Swap all 4 outer-faces from the bottom side to the front side:

M- B- O- B+ M+ B2 M- B+ O+ B2 O- B+ M+ B2 M- B+ O+ B- M+

Swap the Inner Faces:

Use either of the four moves below to place an inner-face from the bottom layer to one of the vertical sides. You may have to rotate the bottom layer first to get everything set. Note that there is an alternate sequence for every swap; they are provided here just in case the main sequence feels uncomfortable to the user. Just as before, the target face gets sent down to the bottom layer by the source face, so each of these four moves can also be used as knock-downs.

N- B- M- B+ N+ B- M+		M- B- N- B+ M+ B- N+		O- B- N- B+ O+ B- N+		N- B- O- B+ N+ B- O+
Alternate: N- B+ O- B- N+ B+ O+		Alternate: M- B+ N- B- M+ B+ N+		Alternate: O- B+ N- B- O+ B+ N+		Alternate: N- B+ M- B- N+ B+ M+

Hint: once again, try not to knock down any center face that has the same color as the bottom face. If you do, then the bottom face will fill up and force you to do more knock-downs later on, which is unnecessary.

It is not neccessary to finish all outer-faces before doing the inner-faces; so you can complete an entire vertical side if you want, even though that is not recommended. After finishing all of the vertical sides, the last 8 center faces are automatically forced to the bottom layer, where they belong anyway. The bottom layer could still be out of sync, so give it another twist and THE PUZZLE IS OVER!

Summary:

• Solve the top center faces FIRST
• Solve the top corners and top edges (in any order)
• Solve the inner and outer equatorial edges (in any order)
• Solve the 4 bottom corners
• Solve the 8 bottom outer-edges
• Solve the 4 bottom inner-edges
• Solve the other five faces LAST.

THE END

@ Notation / Top Face
@ Top Corners @ Top Outer-Edges @ Top Inner-Edges
@ Middle Outer-Edges @ Middle Inner-Edges
@ Bottom Corners @ Bottom Outer-Edges @ Bottom Inner-Edges
@ Middle & Bottom Faces

Return to Mathematica