Good tactical manoeuvring by the Russians here south of Kupyansk utilising the river Oskil as a geographic wall of a cauldron for the towns of Zahryzove, Nova Kruhlyakivka, and Bohuslavka.
There's only one supply road in from the south that the Russians will have under intense fire control. The Ukrainians may be forced to withdraw across the Oskil or south to shore up the town of Borova, that if the cauldron should collapse the Russians will enclose from either side working their way down the river.