I should choose the top-right position (0,2) because it creates an immediate winning condition. I already have 'O' symbols at positions (0,0) and (1,2), so placing an 'O' at (0,2) will complete a diagonal line from top-left to bottom-right, giving me three 'O's in a row and winning the game immediately. The alternative move at (2,1) doesn't create a winning condition, so the top-right position is clearly the optimal choice to win as fast as possible.