Corners

In the chapter "Basics", the corners were conveniently oriented.

What if not so lucky?

    that is the 'sledgehammer' adopted in "Basics".

Lucky        case A case B        case C case D

Don't worry. just keep going .

• The 'sledgehammer' will sort the cubie in 1 time.
• The reverse algorithm will sort the cubie in 1 iteration look at few line below.

The 'sledgehammer' can be used to move a cubie or to change its orientation.

The 'B' and 'D' cases are particularly boring because they require up to 5 repetitions.

    that is the reverse of the 'sledgehammer' above.

However, using the reverse of the 'sledgehammer' adopted in the previous example, they become the most convenient.

The 'Sledgehammer' is a cyclic algorithm and repeats every 6 iterations

The REVERSE of a 'sledgehammer' is still a 'sledgehammer'.

A 'sledgehammer' and its reverse cancell each other.

The reverse of:

• a rotation is the same rotation in the opposite direction: (for example: R becomes R'; F' becomes F).
• an algorithm is the reverse of each rotation from the end to the begin
  for example: the reverse of (R L D' F U L') is (L U' F' D L' R')