Tic-Tac-Toe game of the board size entered by the user between two players.
Notakto is a tic-tac-toe variant, also known as neutral or impartial tic-tac-toe. The game is a combination of the games tic-tac-toe and Nim, played across one or several boards with both of the players playing the same piece. 3 boards have been taken in this case.