I don't really know if this fits in this community, if not just take it down. The map is from the BlackBird group.
Regarding the recent strikes on the Seim river crossings, I've been speculating what Ukraines plans are. Not too long ago, the Ukranian advance around Korenevo slowed a bit. Then they started systematically hitting the Seim river crossings, of which ISW assesses there is only one left.
If the goal was to encircle and trap Russian units, I would assume that Ukraine would make a hard push through Korenevo to the river. As it looks now, it seems like they are leaving a small corridor open. Whether that is due to Russian resistance or Ukrainian planning I have no idea.
This makes me wonder whether they are intentionally leaving a small opening (See: Sun Tzu) to try to make Russian forces low on resources funnel through the opening where they can inflict heavy casualties, or whether they are trying to force the Russians to expend resources trying to prevent being cut off before they close the net.
In any case, I can see Ukraine wanting to secure another major road towards Korenevo that they can use to supply the offensive.
Of course, I don't want anyone to reveal anything that could violate OPSEC, everything I read is based on OSINT. I'm just interested and would like to hear other peoples speculations.
The obvious thing is this was poorly defended enemy territory. By attacking here they got through - Ukraine has entered more land in the last 2 weeks than Russia in all of 2024 (entered does not mean control).
This does several things for Ukraine that we know of. there may also be things it does we have not thought of and Ukraine isn't talking about.
It forces Russia to counter-attack to get their own land back. Defense is generally easier than offense so Ukraine can slowly retreat while inflicting lots of Russian losses. Those are troops that don't attack in Ukraine. Better yet, Ukraine doesn't really care to hold this land so they don't have to make as hard of decisions - if troops will be lost retreat (troops will be lost, but hopefully not as many as there is not much value in trading lives). They can also rig traps that would destroy the land, Ukraine isn't going to pay to rebuild it after the way so not their problem.
It pulls Russian troops out of Ukraine. Even after Ukraine withdraws Russia will be forced to keep more troops on the border to prevent Ukraine from doing this again. Those are troops (including supplies) that cannot defend in Ukraine and in turn that makes it easier to take back their own land back.
It gives Ukraine something to bargain with. "you want your land back, we wants ours, lets just trade and call it even". Russia isn't interested in any bargains at this time, but this gives Ukraine something to work with when they are, and also gives Russia reason to be interested. Overall nobody thinks this is a useful thing at the moment (Russia doesn't care), but it is a consideration.
Last (because you are most likely to remember what is last this is what I think is most important) this improves moral. Ukraine has been slowly losing land for months now - this gives a great moral boost: we can take land from Russia. Both defending troops celebrate and then fight harder, and also friends (NATO) can say aid isn't a lost cause as Ukraine can fight back.