A Special Tic Tac Toe: In Arnold’s Tic Tac Toe, three in a row loses! You are playing the “O” ‘s and it is your turn. What move can you make to force Arnold to end up with three “X” ‘s in a row, so he loses?
Answer: You should place your “O” in the bottom left hand corner. Any other choice will end in a tie.
Here’s how: Shown below are all Arnold’s move options. No matter how he plays to counter your skillful move, he will lose.