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Black and White Cats is a puzzle in Professor Layton and the Last Specter.

Puzzle

US Version

You want to display your impressive collection of black and white cat paperweights on this 4x4 grid.

You must fill every space, and no row or column can have more than two same-colored cats next to each other.

The six cats currently must remain where they are. How can you fill in the rest of the grid?

Touch a space on the grid to place a cat, change its color, or remove it.

UK Version

Let's say you want to display your collection of black and white cat paperweights on a 4x4 grid, leaving no empty space. But you don't want any row or column to have three or more of the same colour in a row.

If you've already placed some of the cats as shown below and don't want to move them, how would you fill out the rest of the grid?

Touch a space on the grid to place a cat, change its colour, or remove it.

Hints




Click a Tab to reveal the Hint.

US Version

Anytime you spot two adjacent cats of the same color in a row or column, any space next to them in that row or column will need to be filled with a cat of the opposite color.

UK Version

Any time you have two adjacent cats of the same colour in a row or column, any space next to them in that row or column will need to be filled with the other colour of cat.

US Version

First, concentrate on the placement of the white cats.

You can only place a total of four cat paperweights in any single row or column. Once you figure out where the white cats go, you can pretty much fill the remaining spaces with black cats.

UK Version

Try paying attention to where the black cats are first. A space separating two black cats in the same row or column can only be filled with a white cat, otherwise you'd end up with three black cats in a row.

US Version

A white cat must belong in the empty space between the two black cats in the column farthest to the right.

Remember, when you have two cats of the same color next to each other in the middle of a row or column, you must place cats of the opposite color on either side of them. Continue placing paperweights according to these rules until the grid is filled in!

UK Version

Only a white cat can go in the empty space between the two black cats in the rightmost column.

Any time you have two cats of the same colour next to each other in the middle of a row or column, you will have to place cats of the opposite colour on either side of them. Just keep placing cats according to these rules until the grid is filled in!

US Version

Put a white cat between the two black cats in the column farthest to the right.

Put white cats in the top and bottom spaces of the second column from the left.

Put a white cat between the two black cats in the second row from the bottom.

Think you can figure out the rest?

UK Version

Start by placing the following cats:

  • Put a white cat between the two black ones in the rightmost column.
  • Put white cats in the top and bottom spaces of the second column from the left.
  • Put a white cat between the two black cats in the second row from the bottom.

Pay attention to where the white cats have been placed and you should be able to place the rest without much trouble.


Solution

Incorrect

Too bad.

US Version

Start by looking at the paperweights that have already been placed on the grid.

UK Version

Start by looking at the cats that have already been placed.

Correct

Correct.

US Version

There was no rule about having an uneven number of black cats and white cats!

UK Version

Looks as if there are more black than white cats overall.

LS028S

A big thanks to http://professorlayton4walkthrough.blogspot.com

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