How do you get the Gummi Dragon in the accompanying screenshot to move?

Thank you for response.

Well, I finally cleared that level, though not due to anything I learned in that video. My luck simply changed, and a Gummi Dragon did not get into that particular position on the board. On the last try, I released all the Gummi Dragons very easily, leaving me to continue wondering why that PARTICULAR one gave me such a problem.

Is the objective to remove the objects DIRECTLY BELOW the Gummi Dragon, despite the gap in the squares, or is it to get it to move to the square JUST BELOW AND TO THE LEFT by removing what's in that square?

The good news is that clearing that level enabled me to, at last, reach Level 3000!