Definitions  Cube solving (part 2) 
The goal of this section is to arrange the side pieces so that each 9 side pieces on one side have the same colour. Since this order, however, would be destroyed again by solving of the edge pieces, solving of the side pieces will be completed only in section 3. At first, the colours of side pieces, which would be exactly opposite on the solved Cube, will be regarded as the same colours.
Select now two colours, which would be exactly opposite on the solved Cube, e.g. red and orange. Which colour will be opposite on the solved Cube you can see on the center side pieces, since these pieces won't change their relative position to each other, even by mixing up the Cube. If the red center side piece would be opposite to the orange center side piece on the unsolved Cube, it would be the same on the solved Cube. The colours on your Cube can differ from those on my site, because there are Cubes with different colour schemes.
Turn the whole Cube so, that as little as possible
side pieces in
the chosen colours would be on the top and on the bottom side. Especially the
center side
pieces mustn't be above or below. Try to get 3piececombinations (consisting of
3 side pieces in
a line) along the remaining 4 sides.
You can get 4 of these combinations with the side
pieces in the selected 2 colours:
Applets 1a to 1c show the principle way to do it:
Start with the 2 combinations, which are including one
center
side piece (Applets 1a, 1b):
Turn, if necessary (see applet 1b), one edge
side piece by a 90° turn on a horizontal
outer
middle layer to a side with no
center
side piece in the selected colours. By turning at the corresponding
outer
layer you can move the edge
side piece up or down and then by turning at a horizontal
outer
middle layer you can move it next to a
center
side piece in the correct colour. Do the same with a second
edge side
piece. On this way you'll get a vertical line, which you should turn
horizontal. Proceed with the second combination on the opposite side just the
same way.
Applet 1a 
Applet 1b 
Applet 1c 
The remaining 4 combinations can be ordered in the same way (see applet 1c):
At first you must form a vertical line with 3
side pieces in
the selected colours, and turn it then horizontal. To form a vertical line, an
edge side piece
has to be turned so that it is positioned left or right. After that,
corner side
pieces on a different side have to be turned so that they would
be positioned direct above or below the
edge side
piece, when they're finally turned to that side. The reason for turning the
3piececombinations horizontal is to avoid that they'll get unordered by
turns on the horizontal outer
middle layers (which are necessary to order the remaining
side pieces).
At the necessary 90° turns at the
outer
layers you have to take care that they'll be only made on sides with no
already ordered 3piececombinations. By specific positioning of the already
ordered 3piececombinations (see point 1.1.3) it is possible at any time to
find a free side, on which a 90° turn can be made without any problem.
The following combinations of turns can be helpful for ordering of the
3piececombinations:
Applet 1d 
Applet 1e 
Applet 1f 
Applets 1d  1f show combinations, at which the positions of the already ordered 3piececombinations don't play any role, because  apart from the side, on which the side pieces should be solved  at no side 90° turns have to be made. In the case of combinations 1e and 1f you have to take care, though, that on the position, which is marked with 3 dark grey side pieces, no ordered 3piececombinations are. The combinations 1e and 1f are only then meaningful, when there's no more "free side" (a side with no ordered 3piececombinations). Otherwise it's better to turn the single corner side piece to a free side and take it there with a 90° turn to its correct position (standard procedure as described above), because this procedure needs less turns, especially in the case of Applet 1f.
Sometime you come to the point, at which you'll need the
side pieces,
which are still on top or on bottom, because you can't get more
3piececombinations without them. In this case, however, there are now enough
"free lines" (3piececombinations with no
side piece
in the chosen colour). Along this free lines you can turn the
side pieces
away from top and bottom without bringing other correct coloured
side pieces
back to top or bottom simultaneously. This "free lines" are marked dark grey in
the following applets.
The procedure when collecting the side
pieces from the upper and lower side is the following:
Continue with solving of the side
pieces as described in point 1.1.1
In most cases it should be possible to get all
side pieces in
the correct colours away form top and bottom. But if there remained some
side pieces on
top or bottom, continue with point 1.1.1 and then carry out point 1.1.2 once
more again.
Applet 1j 
Applet 1k 
At applet 1j step 1 is incomplete to demonstrate all 5 steps as described above. Applet 1k shows the same initial position, but step 1 is done complete. Through this the steps 2, 3 and 5 can be discontinued. In step 4 the whole Cube is turned and then the outer layers are turned back. This has the same effect as if the 3 middle layers had been turned.
Try to place the 3piececombinations in a way that each of the 4 combinations without a center side piece (in the following called "outer 3piececombination") is placed on another side (but not on top or on bottom). The two combinations with a center side piece (in the following called "middle 3piececombination") are inevitable on two opposite sides, so that altogether two 3piececombinations are now on these sides. Make 180° turns on wellchosen sides, so that on each 2 opposite sides the outer 3piececombinations are placed below and on the other 2 opposite sides above. Now you'll only need a 90° turn on the correct outer middle layer and you've reached the goal of section 1.
The following listing contains all possibilities how the Cube can look like before point 1.1.3. After that you'll find for each possibility the matching applet.
The outer 3piececombinations can be spread over the 4 sides as follows:
Applet 1l 
Applet 1m 
Applet 1n 
Applet 1o 
Applet 1p 
Applet 1q 
Hint: Therewith your Cube looks exactly like on one of the applets above, some sides may need a 180° turn. Furthermore it's possible, that the whole Cube must be turned by 180° (so that the top side changes place with the bottom side).
Below you see on an example of the complete solving of the side pieces as described in point 1.1:
Hint: Play the applet step by step for a better understanding of what happens by each turn.
Turn the whole Cube so that the already ordered side pieces (in the example red and orange) are above and below. Then you choose the next pair of side pieces, which are placed opposite, for example green and blue, and order them as described in point 1.1 (point 1.1.2 lefts out, because all side pieces in the chosen colours are already on the 4 remaining sides). Thereby the remaining 2 sides have ordered themselves automatically.
Definitions  Cube solving (part 2) 
