The Basic Plot
- Reduce Edges
- Reduce Triangles
- Place Edges
- Place Triangles
- Place Corners
1. Reduce Edges
The first stage is to reduce the edges. Reducing the edges means attaching a correct outer edge part to the circle edge part. This is done by moving unreduced edges to the white face, then turning the outer collar to reduce an edge, then moving that edge off the white face. The extra complication is not being able to turn the green face once reduced edges are stored there.
2. Reduce Triangles
The next stage is to reduce the triangles. Reducing the triangles means attaching a correct colour trapezium to the small triangle inside the circle. Start by placing three reduced edges of the same colour onto the white face. Then turn the outer collar to attach the correct colour trapezium to a small triangle inside the circle. Once reduced, replace this triangle with an unreduced triangle by something like L'RLR'.
To solve the reduced edges, simply turn them into place, or use the edge piece series (eg. L'ULU'). Make sure you don't turn the white or green ("0") faces while doing this.
4. Place Triangles
The triangles are placed by using a double edge piece series flip. This move is
L' R L R' F R' F' R
This flips the UFL and UFR corners. It also flips the two sets of triangles connected to those corners which are on the Up face. For our purposes, we don't care about corners, so we can flip triangles in this way. Most of the time, you will need one or two setup moves to position appropriate triangles so they can be flipped.
If you're down to the last two triangles, or just need another pair of the same colour to flip, you can perform the setup move R DR. This will place a pair of triangles of the same colour at the UFR position, meaning that only the triangles in UFL will be involved in the flip.
The complicating factor with this puzzle is that two of the circle faces cannot be turned during the sequence.
5. Place Corners
The last stage of the solve is to place the corners. To do this, we will use a sequence based on the edge piece series. This sequence is
This first cycles three corners on the front face. It then replaces the upper corner with another unused corner. Then it undoes these moves. The overall effect is to cycle the three corners at FD->UFL->UB.
The mirror can also be used, namely
R L' R' L B' DR' B DR L' R L R' DR' B' DR B
If the last two corners are in position but flipped, then move them out of position using the sequence above and involving a 3rd corner. Then place them back into position correctly oriented.
And that's it. Your Crazy Octahedron Mars is now solved. I trust this site has been helpful. If you have any questions or want some clarifications, please use the comments to do so. To buy this puzzle, click here.