Can you complete the grid without creating a 3-In-A-Row? Are you looking to use the 3-In-A-Row puzzle in a publication?
KNS Puzzles offers the following sizes and difficulty levels:
6 x 6 - Level 1 - Level 2Each 3-In-A-Row puzzle has only one unique solution, which can be found using logic alone, no guesses are required. To play the 3-In-A-Row puzzles, please visit my BrainBashers playable 3-In-A-Row page.
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.
You are not allowed to have 3 Black squares together, so these highlighted squares have to be be White.
You are not allowed 3 White squares together, so 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.
You are not allowed 3 Black squares together, so these squares must be White.
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 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.
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.