You've probably played Tic Tac Toe before, or Noughts and Crosses, or whatever you want to call it. And as soon as you've mastered the strategies of the game, every round ends in a draw, and it becomes dull. But with a little twist added in, Tic-Tac-Toe-Ception makes you rethink everything you know about the pencil-and-paper game. This Khan Academy build demonstrates one variation of this puzzle-infused variant of a strategy classic.
This Tic Tac Toe variant is played with nine small grids embedded in one large grid. You always play as O, and your computer opponent plays as X. Being the first to get three in a row in one small grid wins you that square in the larger grid, and three big squares in a row wins you the match. However, you don't just get to play your turn anywhere; you're only allowed to play in the grid that corresponds to the square of your opponent's last move. Your opponent's move is then limited to the grid that corresponds to the square that you play in, an so forth. If you're sent to a grid that's already been won to take your turn, you have the freedom to play anywhere, but remember that your move will still set up your opponent's next turn. A fairly obvious move in a standard game of Tic Tac Toe can suddenly become a dubious decision when you know you have to take all ten grids into consideration at once.