a knot of 10 crossing (the minimum)	It needs to change 3 crossings to make it unknot.
	the same knot with 12 crossing	But, we can unknot this one by changing ONLY 2 crossings. Therefore, the unknotting number is 2. Want to see how it is done??

More Examples	I would like to try other examples on invariants.
Main Menu	Take me back to the main menu.