地球仪魔方Masterball的来源研究

jinyou

Phase 1: Put pieces in their correct layers.

1. Find any piece in the top hemisphere (cap or band) that is not in the correct layer.
2. Hold that piece at the front, just to the left of the seam. (On the Logi-Vip sphere, you probably have to turn the layer to get it there.)
3. Find a piece in the opposite layer that does not belong there.
4. Turn that opposite layer until the wrong piece lies at the front, just to the right of the seam.
5. Do this sequence:
   1. Twist the right hand side of the ball.
   2. Shift the layer containing the two pieces to the right, so both pieces cross the seam.
   3. Twist the right hand side of the ball again.
6. Repeat a-e until all the pieces are in the correct layer.

Phase 2: Solve two opposite layers.

1. Find in any layer two adjacent pieces that you want to swap.
2. Hold those pieces at the front, one on each side of the seam. (On the Logi-Vip sphere, you probably have to turn the layer to get them there.)
3. Find any two adjacent pieces in the opposite layer that you also want to swap.
4. Rotate that layer to bring them to the front, too.
5.  Do the following sequence:
   1. Twist the right hand side of the ball.
   2. Shift the top layer to the right.
   3. Twist the right hand side of the ball.
   4. Shift the top layer to the left.
   5. Shift the bottom layer to the right.
   6. Twist the right hand side of the ball.
   7. Shift the bottom layer to the left.
   8. Twist the right hand side of the ball.
6. Continue using steps a-e to do swaps in both layers until one of the layers is solved.
7. Find any adjacent pair in the remaining layer that must be swapped.
8. Turn the layer to bring it to the front.
9. Do the sequence of step e. This temporarily disturbs two pieces in the solved layer.
10. Repeat steps g-i for another pair, and this will also restore the temporarily swappes pieces.
11. Continue repeating g-i until either both layers are solved, or until one of the layers apparently needs a single swap.
12. If one layer apparently needs single swap, it really means that nearly all of them are in the wrong place. Simply pick one of the two 'swapped' pieces, and consider that one to be correct. Then use steps g-j to place the other 7 pieces correct relative to the chosen piece.

Phase 3: Solve other two layers.
This is the same as phase 2, except as applied to the remaining two layers. Finally, turn all the layers so that they match up.

jinyou

对不起，我没有仔细看过。只是我不明白1、4和2、3有什么区别？