Would you like to use 3-In-A-Row puzzles in your publication?

I can provide 3-In-A-Row puzzles in the sizes and difficulties listed below, in any print size, and at any resolution, and in most print formats (including TIFF, PNG, JPG, PDF, etc). Please feel free to contact me to discuss your requirements for 3-In-A-Row puzzles, and if required I'll send you some printable samples.

6 x 6 - Level 1 - Level 2

8 x 8 - Level 1 - Level 2

10 x 10 - Level 1 - Level 2

12 x 12 - Level 1 - Level 2

14 x 14 - Level 1 - Level 2

18 x 18 - Level 1 - BrainBashers Weekly Special

Can you complete the grid without creating a 3-In-A-Row?

Whichever size or difficulty level you are playing, each 3-In-A-Row puzzle has only one unique solution, which can be found using logic alone, no guesses are required.

Fill the grid with squares containing Black(X) and White(O). A 3-In-A-Row of the same colour/letter is not allowed. Each row and column has an equal number of Black(X) and White(O) squares. See the Walkthrough or Advanced Tips below for extra tips and helpful hints to help you solve this 3-In-A-Row puzzle.

This is the start of the puzzle. As you can see, some of the squares have filled in.

You are not allowed to have 3 Black squares together, so these highlighted squares have to be be White.

Also, you are not allowed to have 3 White squares together. Therefore, this square has to be Black.

Each row and column must contain the same number of Black and White squares, so these squares must be White.

As noted earlier, you are not allowed to have 3 Black squares together, so these squares must be White.

Again, you are not allowed to have any 3 Black squares together, so these highlighted squares must be White.

Each row and column must contain the same number of Black and White squares, so these squares must be Black.

Each row and column must contain the same number of Black and White squares, so this square must be White.

Each row and column must contain the same number of Black and White squares, so this square must be Black.

Each row and column must contain the same number of Black and White squares, so these squares must be Black.

You are not allowed 3 Black squares together, so these squares must be White.

Each row and column must contain the same number of Black and White squares, so this square must be White.

You are not allowed 3 White squares together, so this square must be Black.

You are not allowed 3 Black squares together, so this square must be White.

The puzzle will now complete as each row and column must contain the same number of Black and White squares.

The completed puzzle. As you can see, all squares are now filled in.

This square cannot be Black, if it was, it would force the 3 remaining squares in this row to be White, and this would be a 3-In-A-Row of White squares - which isn't allowed. Therefore this square is White.

Similarly this square must be Black, as it cannot be white because that would leave 3 black squares together..