Rules / Objectives Summary

- Fill the grid with squares containing Blue(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 Blue(X) and White(O) squares.

See the Walkthrough or Advanced Tips below for extra tips and tricks.

Objective

When the puzzle is complete each row and column has an equal number of Blue and White 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

Step 2

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

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

Step 3

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

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

Step 4

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

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

Step 5

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

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

Step 6

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

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

Step 7

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

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

Step 8

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

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

Step 9

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

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

Step 10

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

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

Step 11

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

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

Step 12

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

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

Step 13

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

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

Step 14

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

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

Step 15

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

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

Step 16

The completed puzzle.

The completed puzzle.

## Advanced Tips

This square cannot be Blue, 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.

Therefore this square is White.

Similarly this square must be Blue.

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