Step 1
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The 1st layer When the layer is fully processed, your puzzle will look like this:
No particular algorithm.
The placement of pieces must remain intuitive.
Here are the main steps:
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The centers
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The edges
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The corners
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Step 1a
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The centers of the 2nd layer
You will need to make sure that all the centers are oriented correctly, if so you are good.
Otherwise, you have 1 case for each misdirected center.
Place the centers to be oriented as indicated opposite.
When all the centers are correctly oriented, your puzzle will look like this:
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Step 2
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The edges of the 2nd layer When all the edges have been processed, your puzzle will look like this:
Note: we do not know if the edges are correctly oriented, this is why there is no case c and step 2 bis may be necessary.
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Case a The edge is on the 3rd layer on the right
The algorithm allows it to be placed on the 2nd layer.
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Case b The edge is on the 3rd layer opposite
The algorithm allows it to be placed on the 2nd layer.
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Step 2a
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Parity of an edge of the 2nd layer It will be necessary to ensure that the number of poorly oriented edges of the 3rd layer is even (0, 2 or 4), if this is the case, all is well.
Otherwise, if it is odd, an edge of the 2nd layer is incorrectly oriented, you have 2 scenarios (for 1 or for 3).
Position the incorrectly oriented edges as shown opposite.
When the number of edges of the 3rd layer is even, you will have one of the following 4 scenarios:
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1 poorly oriented edges
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3 poorly oriented edges
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Step 3
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The edges of the third layer When all the edges have been processed, your puzzle will look like this:
Note: there is no edge placement.
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Orient the edges - Case a
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Orient the edges - Case b
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Step 4
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The corners of the third layer When all corners have been processed, your puzzle will look like this:
Note: there is no corner placement.
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Orient the corners
Depending on your configuration, you should apply the algorithm 2 times maximum!!!
Remember to orient your cube correctly so as to avoid performing the algorithm more than necessary, that is to say not necessarily the 3rd layer at the top.
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