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The Trap Y method

When the cube shows this configuration the cubie OY, OYG and YG are in the wrong position.

(Take a look to the other examples for a more in depth analysys.)



There are 2 perfectly equivalent configuration:

What change is just the orientation of the 2 cubies. But at this stage we do not care at all about the cubies RY and YB.
(The example 'Tutorial.Mthod Y.Orientate edges' shows how to change the rotation of 2 edges)



It is a matter of rotations: a cubie cannot be placed anywhere.

In this case (on the layer 3) only 2 out of 4 positions are available for each cubie.

The solution is easy, but not that easy: a single rotation. could have been a solution.

For example: the rotation U' brings the RY cubie to 'rus', (its correct position). However that position is inside the workbench and that creates lots of problems because we still have other cubies to place and the workbench still remains the place for the side effects.

Using the method 'Workbench' the 'rotation' must be performed in a different way.

For example: (focusing on the cubie OYG) the rotation U' brings the OYG from the position 'lub' to the position 'rub'. The same result can be achived with a sledgehammer as for the following solution.

Two ways to tackle the same problem:

The goal: move cubie OYG (position 'lub') to one of the 2 adiacent corner: 'rub' or 'luf'.

The formal solution is conceptually straightforward but requires more steps to be completed.

The 'intuitive' solution take advantage of the fact that (at that stage) we do not care about any of the cubies on the Yellow face. Therefore the cubie OYG is placed in the position 'ruf' with a double rotation (regardles for the side effect on the Yellow face)


  Buttons Click these buttons
1.1)
Brings the cubie OYG from the 'lub' position onto the 'workbentch'.

(to the 'ruf' position)
The position chosen is the center of the 'Workbench' from where the cubie can move directly to its new position.

1.2)
This 'sledgehammer' does the 'magic'.

This 'sledgehammer' moves the cubie OYG from the 'ruf' position to the 'luf' and doing that changes the relative position between the cubies making the Cube solvable.

1.3)
Brings the cubie OYG to its final position.

The same position occupied at the beginning. What changed is that now the cube is solvable.

1.1)
Brings the cubie OYG on the 'lub' position onto the 'workbentch'.

The solution adopted here, is a bit 'formal' and requires more moves than the necessary. On the other end it is the more 'conceptually' easy solution:
- steps 1.x) move the cubie OYG onto the 'workbench' using the set of 3 moves that defines the 'Workbench' method.
- steps 2.x) bring the cubie OYG to its final position using a 'sledgehammer'. - step 3) and step 4) are those that put in place the cubie YG and OY - step 5) is a couple of sledgehammer that can change the orientation to the la 2 cubies (edges) RY ans YB.

1.2)
Moves the cubie OYG anywhere else on the workbench. So that the face orange can be restored (rolled back) with the next move.
1.3)
Reverses the 'side effects' of the first move. That completes the first step: bring the cubie OYG onto the 'workbench'.
2.1) 3
The OYG goes between the edges OY and OB, Yellow sticker up. This sledgehammer must be reiterated 3 times to get the cubie correctly positioned and oriented.
- The first iteration brings the cubie to its correct place
- Then other 2 two times (the same sledgehammer) to orientate correctly the cubie.
2.2)
Brings the cubies OYG to its final position.
2) Replaces the cubie OY
3) Replaces the cubie YG