This is how I hold it...

At the Competition on Saturday the judge told me I held my knife wrong.  She told me I needed to extend my index finger down the knife blade... Now I am not one to be told for 15 years I have been doing something wrong, as I know my grip is correct.  My way is; Pinching the blade with thumb and index finger hand on the handle. As demonstrated in the below picture.  I have always been told the index finger down the blade can twist the blade out and ultimately cut you. 

Proper Chef's Knife Grip

THANKS I am RIGHT!