## Rubik's Domino

### II. Solve the Black Pips (light background)

Flip the entire puzzle over to the other side, the side with the black pips. This will be the new front face for the rest of the solution. Solve the black pips (with the light background) counting from right-to-left; in other words 3-2-1 for the top row, 6-5-4 for the middle row and 9-8-7 for the bottom row.

Why is this side solved backwards? Because you have to solve both sides so that the matching number of pips are "back-to-back" for each tile. If you had X-ray vision, you could easily see that the tiles of the solved side (which is now the new back face) are at a mirror-imaged state.

### 1. Solve the #1 tile

 Because all the black pips are already on the new front side, there are no more knock-downs or move-ups to worry about. Anyway, to solve the #1 tile: Merely rotate the front face until the #1 tile is at the upper-right. Throughout the rest of the solution, make sure that the #1 tile is always at the upper-right before solving another tile.

It is now time to introduce yourself to another move that you have to memorize:

## R F+ R F- RB F- B F+ B F-

#### What the move does:

It swaps the two corner tiles on the right column,
while leaving the other corners intact.

This move will be used in first 3 steps only, which are geared toward solving the CORNERS.

### 2. Solve the #3 tile

#### Case I:

The #3 tile is at the
bottom-left

#### Set up:

Rotate the front face
so that the #3 tile is
at the upper-right.

## R F+ R F- RB F- B F+ B F-

And then rotate
the front face...

...until the 3-1 tiles
are on the top row
(where they belong).

#### Case II:

The #3 tile is at the
bottom-right
(opposite corner).

#### Set up:

Rotate the front face
so that the #3 tile is
at the lower-right.

## R F+ R F- RB F- B F+ B F-

And then rotate
the front face...

...until the 3-1 tiles
are on the top row
(where they belong).

### 3. Swap the other corners (if necessary)

The last 2 corner tiles
are on the bottom row,
and need to be swapped.

#### Set up:

Rotate the front face
so that the #7 and #9
tiles are both on the
right column.

## R F+ R F- RB F- B F+ B F-

And then rotate
the front face...

...until the 3-1 tiles
are on the top row again.

It is now time to introduce yourself to yet another and another move that you have to memorize:

## R F2 R F2 R F2

#### What the move does:

It swaps the two edge tiles on the middle column,
while leaving all the other tiles intact.

## R F+ R F+ R F2 R F2R F+ R F- R

#### What the move does:

It swaps the right-edge tile with the bottom-egde tile,
while leaving all the other tiles intact.

These moves will be used in last 3 steps, which are geared toward solving the EDGES.

### 4. Solve the #2 tile

#### Case I:

The #2 tile is at the
bottom row
(opposite edge).

#### Set up:

Rotate the front face
so that the #2 tile is
at the bottom row.

## R F2 R F2 R F2

And then rotate
the front face...

...until the 3-2-1 tiles
are on the top row
(where they belong).

#### Case II:

The #2 tile is at the
right column

#### Set up:

Rotate the front face
so that the #2 tile is
at the bottom row.

## R F+ R F+ R F2 R F2R F+ R F+ R

And then rotate
the front face...

...until the 3-2-1 tiles
are on the top row
(where they belong).

#### Case III:

The #2 tile is at the
left column

#### Set up:

Rotate the front face
so that the #2 tile is
at the right column.

## R F+ R F+ R F2 R F2R F+ R F+ R

And then rotate
the front face...

...until the 3-2-1 tiles
are on the top row again.

### 5. Solve the #4 tile

#### Case I:

The #4 tile is at the
left column
(opposite edge).

#### Set up:

Rotate the front face
so that the #4 tile is
at the bottom row.

## R F2 R F2 R F2

And then rotate
the front face...

...until the 3-2-1 tiles
are on the top row
(where they belong).

#### Case II:

The #4 tile is at the
bottom row

#### Set up:

Rotate the front face
so that the #4 tile is
at the bottom row.

## R F+ R F+ R F2 R F2R F+ R F+ R

And then rotate
the front face...

...until the 3-2-1 tiles
are on the top row
(where they belong).

### 6. Swap the other edges (if necessary)

The last 2 edge tiles
need to be swapped.

#### Set up:

Rotate the front face
so that the #6 tile is
at the right column.

## R F+ R F+ R F2 R F2R F+ R F+ R

And then rotate
the front face...

...until the 3-2-1 tiles
are on the top row again.

### One final move:

Rotate one of the faces (either front or back) so that all the individual tiles are back-to-back with each other. In other words, make sure that the #1 tiles are back-to-back, the #2 tiles are back-to-back, etc. Afterwards you can declare yourself as "Lord of all Carcassonne".

### Epilog:

I do not own a Rubik's Domino, and becuase they are horribly expensive anymore, you may not own one either. But you can solve one by manipulating a regular Rubik's Cube using the following restrictions:

• Choose a FRONT color, which in turn determines the BACK color. These 2 colors will simulate the FRONT and BACK faces of the Domino puzzle. You are allowed to flip the entire cube upside-down (so that the FRONT and BACK layer switch sides); but the equitorial layer must always remain as the equator.
• You are allowed to rotate any HORIZONTAL layer (FRONT or BACK) 1/4 of a turn; except for the equatorial layer itself... which you should ignore completely.
• You can only rotate any VERTICAL layer (LEFT, RIGHT, TOP or BOTTOM) 1/2 turn around. These sides simulate the "edges" that you flip around on a Domino puzzle.
• You must start off with a solved Cube, and are only allowed to scramble it afterwards using the same restrictions.