How far is Putin going to go?
My personal opinion is that Putin has pretty much gone as far as he can go, he has painted himself into a corner where his military can not go forward without heavy casualties in both Russian soldiers and Ukrainian civilians which will not play well at home or abroad.
The unfortunate thing is that he cant stop now either as that would more than likely be both political and physical suicide.
Pretty much every aspect of this operation has been a total failure, his troops look confused, inept and embarrassed especially when being berated or laughed at by elderly Ukrainians, on a strategic level his economy is on the verge of collapse, militarily they have grossly underestimated the fighting capacity of the Ukrainian military along with the resilience and desire of its population to not want to be Russian.
Politically, NATO and the EU are more united now than ever and somehow he has managed to light a fuse under the Germans, a friend in Germany says there is a joke going around that Putin and Zelensky have swapped roles, Zelensky started out a clown and became a world leader and Putin started out a world leader and has become a clown.
So how far will Putin go, my best guess is that he has to achieve a point where he can declare his objectives complete and go home and I suspect that will be with the fall of Kyiv and Kharkiv and the "accidental and unforeseen" death of Zelensky, to leave short of that will a Ukrainian victory and probably mean a polonium pill in his dinner.
To some degree, Ukraine's success may now be acting against it and while it would be a bitter pill for them to swallow it may be better if they offered Russia something (Probably Crimea) to end it as you have a situation where you have an inept military that cant lose fighting an efficient military that can't win and the result will be more casualties for everyone.