Not necessarily. If you look at the example, you are supposed to be able to pin down the exact point of each bomb using a minimum of three probes (hence the name of the game). If you're not able to click on the exact spot and you're on Windows, use Magnifier:
{WinKey and +} launches the program as well as zooms in
{WinKey and -} zooms out
{WinKey + Esc} closes Magnifier