Nothing beats the original Texas Chainsaw Massacre in terms of visceral terror, and creating a constant sense of unease, while having very little gratuitous violence. It's one of the best horror films of all time, it's not just another slasher flick, it delves into the most heinous depravity of people, and while a simple story, shows the true horror of a person thrust into a life threatening experience. Gore becomes a crutch often to stand in for a lack of true tension, but violence is only disgusts, it doesn't create a true sense of suspense and terror.
He may be thinking of 'Pieces' from 1982, but that has a scene of a killer backing into a lift with a chainsaw and hiding it from an unsuspecting female victim, not a policeman.
Ebert didn't know it was going to be a classic when he first reviewed it. He has since gone to say he enjoys it more now looking back on it. And I still prefer the originals, even the fourth one, better than the originals because at least they had an identity, Leatherface was actually interesting. The remakes turn him into a generic, teleporting hunk of death that they desperately try to explain as 'tragic'. Seriously, Platinum Dunes needs to stop with the 'tragic' bad guys; it destroys them.
He's so right. These remakes/sequels show how horror movies have lost their imagination and have become about cliches, style and copying other films. The makers think that a horror film should be sadistic, chasing teenagers. There is not one moment of real terror in any of these recent films to match Hooper's original. He understand the emotions and fear and allows us to experience the film this way.
I think Ebert said it best when he said about the remake: "There is no worthy or defensible purpose in sight here: The filmmakers want to cause disgust and hopelessness in the audience. Ugly emotions are easier to evoke and often more commercial than those that contribute to the ongoing lives of the beholders." That's how I saw the remakes: they hate the audience and isn't concerned with entertaining them. It's more concerned with making its characters suffer and gleefully piling up the bodies.