Update from Z-blogger Romanov about the current situation:
Korenevo still under Russian control but the population is evacuated
According to him, Sudzha is still under UA control despire Russian attacks which failed
There is bad communication, likely due to jamming, therefore Russian positions are difficult to determine
Ukraine brought up reserves and introduced them into the region overnight
Instead of what the Russian MoD claims, Ukraine isn't bogged down and is actively maneuvring.
@noelreports Speed is of essence here, in whatever they are trying to do.