πŸ‘€ Login | Register


Select Theme:
  • Light
  • Dark
BG

Sudoxxo

Fill all the cells with X and O following this 3 simple rules:
  • - No more than 2 adjacent X or O in a row or in a column
  • - Equal number of X and O in a row and in a column
  • - There cannot be 2 identical rows or columns
New game
O
O
X
X
X
X
O
X

About the game

Easy and interesting logic game - puzzle whose goal is similar to the game of Sudoku, but instead of the numbers from 1 to 9, the symbols X and O are used.

The game is known by many names, such as Binary Sudoku, Takuzu, and several others copyrighted by some companies names.

Rules

Each cell must be filled with X or O following these rules:

  • - There cannot be more than 2 adjacent X or O in a row or in a column
  • - There should be equal number of X and O in a row and in a column
  • - There cannot be 2 identical rows or columns

To put X in an empty cell, click on it, on second click it becomes O. Click again to remove it.

When you solve the puzzle, you will see a "Congratulations!" message.

The game is created for enjoyment and to train your mind. Have fun!

Playing tips

Press here to see the tips

Pairs

Find a pair in a row or in a column like this:

⬜⬜⬜⬜⬜⬜
⬜⬜⬜⬜⬜⬜
⬜⬜⬜⬜⬜⬜
⬜⬜⬜⬜⬜⬜
⬜🟦🟦⬜⬜⬜
⬜⬜⬜⬜⬜⬜
and add opposite color next to them:
⬜⬜⬜⬜⬜⬜
⬜⬜⬜⬜⬜⬜
⬜⬜⬜⬜⬜⬜
⬜⬜⬜⬜⬜⬜
🟨🟦🟦🟨⬜⬜
⬜⬜⬜⬜⬜⬜

Triples

Find a same cells with an empty cell between them

⬜⬜⬜⬜⬜⬜
⬜⬜⬜⬜⬜⬜
⬜🟦⬜⬜⬜⬜
⬜⬜⬜⬜⬜⬜
⬜🟦⬜⬜⬜⬜
⬜⬜⬜⬜⬜⬜
and add opposite color in the empty cell.
⬜⬜⬜⬜⬜⬜
⬜⬜⬜⬜⬜⬜
⬜🟦⬜⬜⬜⬜
⬜🟨⬜⬜⬜⬜
⬜🟦⬜⬜⬜⬜
⬜⬜⬜⬜⬜⬜

Incomplete lines

Find the rows and columns that have enough cells filled with one color

⬜⬜⬜⬜⬜⬜
⬜⬜⬜⬜⬜⬜
🟦🟨🟦⬜⬜🟦
⬜⬜⬜⬜⬜⬜
⬜⬜⬜⬜⬜⬜
⬜⬜⬜⬜⬜⬜
and add opposite color in the empty cells.
⬜⬜⬜⬜⬜⬜
⬜⬜⬜⬜⬜⬜
🟦🟨🟦🟨🟨🟦
⬜⬜⬜⬜⬜⬜
⬜⬜⬜⬜⬜⬜
⬜⬜⬜⬜⬜⬜

Similarities

Find a similar line (row or column) that matches to another fully filled line

⬜🟦⬜⬜⬜🟦
⬜🟨⬜⬜⬜🟨
⬜🟨⬜⬜⬜🟨
⬜🟦⬜⬜⬜🟦
⬜⬜⬜⬜⬜🟨
⬜⬜⬜⬜⬜🟦
and since no 2 lines can be the same, the empty cells should be filled with the opposite color.
⬜🟦⬜⬜⬜🟦
⬜🟨⬜⬜⬜🟨
⬜🟨⬜⬜⬜🟨
⬜🟦⬜⬜⬜🟦
⬜🟦⬜⬜⬜🟨
⬜🟨⬜⬜⬜🟦

Impossibilities

Find a line (row or column) where one is missing from color and if that color is placed on a specific cell, it will be impossible to fill the rest of the line, like:

⬜🟦⬜⬜⬜⬜
⬜🟦⬜⬜⬜⬜
⬜🟨⬜⬜⬜⬜
⬜⬜⬜⬜⬜⬜
⬜⬜⬜⬜⬜⬜
⬜⬜⬜⬜⬜⬜
The bottom cell cannot be filled with blue because remaing 2 yellows will make a line of 3 yellows, so the bottom cell should be filled with yellow.
⬜🟦⬜⬜⬜⬜
⬜🟦⬜⬜⬜⬜
⬜🟨⬜⬜⬜⬜
⬜⬜⬜⬜⬜⬜
⬜⬜⬜⬜⬜⬜
⬜🟨⬜⬜⬜⬜