Yes but most of it is NNUE, a custom neural network trained on mountains of data to copy modern Stockfish.
So a computer from back then _can_ run at Elo +3k, but the programmers at the time wouldn't have been able to implement it even if you went back with a time machine and the blueprint for the technique. They wouldn't have the teacher model to distill from.
So a computer from back then _can_ run at Elo +3k, but the programmers at the time wouldn't have been able to implement it even if you went back with a time machine and the blueprint for the technique. They wouldn't have the teacher model to distill from.