In Disconnect Four, you need to fill in the puzzle fields in such a way that four or more cells are not filled in a row with one color. No more than 3 cells can be placed in one row, including the diagonal ones. The puzzle is also known as Tic-Tac-Toe, as sometimes tic-tac-toe images (x's and o's) are used instead of two different colors. Some cells are already filled, and it is impossible to change their color. These cells are marked with a special mark.