SOLVING THE RUBIK’S CUBE 2x2x2
Question: How many cubelets do we need to solve?
Answer: 7 at the most! You can choose any cubelet and say: this is the one where I will begin to solve the cube! In this way, the chosen cubelet becomes your basic cubelet and according to that basic cubelet you will adjust and solve the other 7 cubelets!
Question: Why 7 at the most? Can’t we start with less than 7?
Answer: You sure can! It is often the case that you start with 2 already solved cubelets.
Question: Which colour should we begin with?
Answer: It is irrelevant, start with whatever suits you!
Question: Is it easy to learn the method of solving the Rubik's cube 2x2x2?
Answer: Yes, if you have already mastered the Rubik’s cube 3x3x3, and therefore you already know how to solve the first layer. In step 2, there are only 7 algorithms for 7 different situations. In step 3, there are 2 optional algorithms for permuting the angles.
So, let us begin…
Step 1 – the first layer
For solving the first layer of the Rubik’s cube 2x2x2, we will use the rotations you already know from solving the first layer of the Rubik’s cube 3x3x3. Let us watch the following video that compares the rotations of these two cubes simultaneously:
Let’s not forget that, prior to these rotations, the active cubelet from the upper row was led to the position upper-right, and that it is laid on the adequate side, considering its colours and the place where it should be laid.
Question: How are we to know whether the colours are adequate to these sides, and if it is on the adequate corner? There are no middle cubelets that would determine the colour of the sides!
Answer: True, there are no middle cubelets here, and yet the chosen cubelet will be the one that determines the colours of these sides.
It is necessary to remember which are the colours of the opposing sides of the Rubik’s cube:
white - yellow
blue - green
red – purple (or orange)
Finally, for all of you who would like to solve the Rubik’s cube 2x2x2 with as few moves as possible, the advice is to notice the neighbouring side (A) or diagonally matching cubelets (B) as shown in the following picture, and to base the future solving on them. Even if you do not come across these cubelets at the start, we believe that in one or two moves, you will intuitively match two cubelets that you see are easy to match! Try it!
In scenario A (this example) the starting colour is either white or blue, and in scenario B it is red. It is necessary to match the remaining two cubes of the first layer, and you can either do it intuitively, or in a classic way, based on the above shown video.
(If you are an absolute beginner and find it hard to do this, simply start with the first cubelet that has a white colour and match the other three, in a classic school way).
Solving the first layer is very easy; we have learnt to economize our moves, and to make any colour the starting one.
Let us continue with solving the second layer, more precisely, with
solving the colour on top of the Rubik’s cube 2x2x2