> Combinations of human+engine operate at a ~3800 rating level. They...really don't? There aren't competitive matches between human/computer teams at classical

> Combinations of human+engine operate at a ~3800 rating level. They...really don't? There aren't competitive matches between human/computer teams at classical time controls. There are correspondence games, which is presumably what you're referring to, which are officially played by humans but with unlimited access to computers. But those are played at a time control of multiple days per move. It's true that there still seems to be some human skill involved in leading the computer, balancing the outputs of different engines, finding moves which your opponent's engine may misevaluate. A beginner with a powerful computer won't win the ICCF World Championship. But firstly this is a very niche activity compared to the one Magnus Carlsen competes at, and secondly I don't see any evidence that an unassisted engine scores only 15% against top correspondence players, which would be necessary for a 300-point disparity. At the very least I'd expect it to draw almost all its games as White.