Step 3: Solving the first layer of the Pyraminx
You choose which will be the starting face that you will put face down. You can choose the face that has the most correctly solved parts, and it makes no difference what colours will be on your starting face
According to the colour of the starting face in this step we will only solve the side two-colour parts that contain that colour.
In our example the base colour is yellow so that we can notice the following two-colour parts of the pyraminx:
We begin by rotating the middle layer, bringing the part that we solve towards the face whose lower limbs are of the same colour as that part.
It is important to pay attention to whether it will be above the left or the right limb, for that decides what algorithm to choose in order to solve the Pyraminx.
In the case of our example we first solve the yellow-red part – we turn the pyraminx so as to face the red colour and use the rotation of the middle layer to bring the red triangle to face us, while the yellow one goes behind. We emphasize the matching of the red triangle with the right red limb. Next follows the algorithm L'UL to lower the yellow colour into the first (basic) layer.
After we do this algorithm we turn the whole pyraminx so as to face the green colour. We emphasize the matching of the green edge triangle with the left green limb which leads us to the second algorithm RU'R'.
In our example the starting position of the yellow-blue part was in the first layer and at the correct position. It may happen, however, that there are cases with some of the border two-colour parts in the first layer, but at the wrong position – when that happens, we should use these same algorithms to bring them to the middle layer, to correctly position them and to bring them down to the first layer again.
Upon completion of the first layer we are only left with solving three other parts of the Pyraminx.