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Now the bottom face
This algorithm R- F- R+ F- R- F2 R+
will put in place the 4 yellow corners
but first you have to hold correctly the cube
If there is only one yellow cube
hold the cube with the yellow cube up left
When two yellows are opposite one to another
hold the cube like this.
If two yellows are side by side
Look for yellows on the side of the cube
none here
nor here
nor here either
two here
hold the cube this way with the two yellows down
and the other two like this
Finally, no yellow at all
Look on the sides for yellows
one yellow cube right here
here two
one here
none here
When there is no yellow on the bottom side
hold the cube with no yellow on top like this
Usually, you need to perform this algorithm 3 times
It can be 1 or 2, but usually 3 times
R- F- R+ F- R- F2 R+
Only one yellow... top left
Once again R- F- R+ F- R- F2 R+
There it is, all corners in place !