LGP and a block?
 

Let's say one of my guards is on the perimeter and advances towards the basket. His defender has LGP to start, but decides to try for a steal turning his shoulder as he extends his arm. My guard protects the ball and dribbles through him and pushes him back. Since the definition of LGP includes:

ART 2
b. The front of the guard's torso must be facing the opponent.

ART 3
b. The guard is not required to continue facing the opponent.

c. The guard may move laterally or obliquely to maintain position, provided it is not toward the opponent when contact occurs.

Is this an offensive or defensive foul? My position is the defender is moving forward as my guard is driving to the basket which takes him out of the LGP. I'm also curious about the turn of the shoulder if that affects the LGP.

I'd have to see it, but I don't think reaching an arm forward would be enough movement to warrant a blocking call when contact is through the torso.

Let's say contact isn't directly on torso, but on the hand/arm or shoulder. The defender is no longer facing the dribbler square, they're 3/4 turned because of the attempted steal. In other words, my guard sees the attempted steal and takes advantage by trying to blow by the guy.

Being turned, once LGP is obtained, doesn't make the defender lose LGP. The defender can do the hokey-pokey (the turn yourself about part) if they wanted once they obtain LGP. The facing the opponent part is ONLY for initially obtaining LGP.

That said, there very well may be an illegal use of hands or a hand check foul if the contact is between the defender's arm and the dribbler. But that has nothing to do with LGP.

That's what I'm thinking. OTOH, the OP also sounds as if the dribbler has pushed off the defender, which also sounds like a foul.

I'd have to see the play to offer anything approaching definitive. Sounds messy.

I would try to determine what "first contact" occurred, and if that contact was legal or illegal. If first contact, if any, was legal, then I immediately look for next contact. Was that legal or illegal?

Maybe the defender reached for the steal, but didn't make any contact. I have no foul. If the dribbler gets defensive about that and moves and arm up and creates space with contact, I may have a PC foul.

Then again, I wasn't there. So, hard to apply to the exact sitch.

Difficult/Impossible to make a ruling without video.