Objectives / Rules
- Fill the grid with Blue(X) or White(O) squares.
- Every row and column has an equal number of Blue(X) and White(O) squares.
- A 3-In-A-Row of the same colour / letter isn't allowed.
See the Walkthrough or Advanced Tips below for extra tips and tricks.
![3-In-A-Row Puzzle](/gifs_3inarow20230518a/3inarow1.gif)
Objective
When the puzzle is complete each row and column has an equal number of Blue(X) and White(O) squares.
There will be no sequence of 3-In-A-Row squares of the same colour.
Click or move your mouse over the puzzle to see its answer.
Walkthrough
![Help 1](/gifs_3inarow20230518a/3inarow1.gif)
![Help 2](/gifs_3inarow20230518a/3inarow2.gif)
Step 2
You are not allowed 3 Blue(X) squares together, so these squares must be White(O).
You are not allowed 3 Blue(X) squares together, so these squares must be White(O).
![Help 3](/gifs_3inarow20230518a/3inarow3.gif)
Step 3
You are not allowed 3 White(O) squares together, so this square must be Blue(X).
You are not allowed 3 White(O) squares together, so this square must be Blue(X).
![Help 4](/gifs_3inarow20230518a/3inarow4.gif)
Step 4
Each row and column must contain the same number of Blue(X) and White(O) squares, so these squares must be White(O).
Each row and column must contain the same number of Blue(X) and White(O) squares, so these squares must be White(O).
![Help 5](/gifs_3inarow20230518a/3inarow5.gif)
Step 5
You are not allowed 3 White(O) squares together, so these squares must be Blue(X).
You are not allowed 3 White(O) squares together, so these squares must be Blue(X).
![Help 6](/gifs_3inarow20230518a/3inarow6.gif)
Step 6
You are not allowed 3 Blue(X) squares together, so these squares must be White(O).
You are not allowed 3 Blue(X) squares together, so these squares must be White(O).
![Help 7](/gifs_3inarow20230518a/3inarow7.gif)
Step 7
Each row and column must contain the same number of Blue(X) and White(O) squares, so these squares must be Blue(X).
Each row and column must contain the same number of Blue(X) and White(O) squares, so these squares must be Blue(X).
![Help 8](/gifs_3inarow20230518a/3inarow8.gif)
Step 8
Each row and column must contain the same number of Blue(X) and White(O) squares, so this square must be White(O).
Each row and column must contain the same number of Blue(X) and White(O) squares, so this square must be White(O).
![Help 9](/gifs_3inarow20230518a/3inarow9.gif)
Step 9
Each row and column must contain the same number of Blue(X) and White(O) squares, so this square must be Blue(X).
Each row and column must contain the same number of Blue(X) and White(O) squares, so this square must be Blue(X).
![Help 10](/gifs_3inarow20230518a/3inarow10.gif)
Step 10
Each row and column must contain the same number of Blue(X) and White(O) squares, so these squares must be Blue(X).
Each row and column must contain the same number of Blue(X) and White(O) squares, so these squares must be Blue(X).
![Help 11](/gifs_3inarow20230518a/3inarow11.gif)
Step 11
You are not allowed 3 Blue(X) squares together, so these squares must be White(O).
You are not allowed 3 Blue(X) squares together, so these squares must be White(O).
![Help 12](/gifs_3inarow20230518a/3inarow12.gif)
Step 12
Each row and column must contain the same number of Blue(X) and White(O) squares, so this square must be White(O).
Each row and column must contain the same number of Blue(X) and White(O) squares, so this square must be White(O).
![Help 13](/gifs_3inarow20230518a/3inarow13.gif)
Step 13
You are not allowed 3 White(O) squares together, so this square must be Blue(X).
You are not allowed 3 White(O) squares together, so this square must be Blue(X).
![Help 14](/gifs_3inarow20230518a/3inarow14.gif)
Step 14
You are not allowed 3 Blue(X) squares together, so this square must be White(O).
You are not allowed 3 Blue(X) squares together, so this square must be White(O).
![Help 15](/gifs_3inarow20230518a/3inarow15.gif)
Step 15
The puzzle will now complete as each row and column must contain the same number of Blue(X) and White(O) squares
The puzzle will now complete as each row and column must contain the same number of Blue(X) and White(O) squares
![Help 16](/gifs_3inarow20230518a/3inarow99.gif)
Step 16
The completed puzzle.
The completed puzzle.
Advanced Tips
![Help 17](/gifs_3inarow20230518a/3inarow17.gif)
This square cannot be Blue(X), if it was, it would force the 3 remaining squares in this row to be White(O), and this would be a 3-In-A-Row of White(O) squares – which isn't allowed.
Therefore this square is White(O).
Therefore this square is White(O).
![Help 18](/gifs_3inarow20230518a/3inarow18.gif)
Similarly this square must be Blue(X).
Note: BrainBashers has a Dark Mode setting.