"No Four in a Row" is an entertaining puzzle. Despite the only simple rule, some levels are very difficult to solve. Solving this puzzle requires a lot of attention.

To solve the puzzle you need to fill ALL the cells of the playing field with only two characters: "X" and "O".
The only rule - horizontally, vertically or diagonally there should not be four identical symbols. If in the process of solving a puzzle, an application will notice such a situation, it will indicate to you by highlighting the corresponding characters.