Cease Fire
Ukraine keeps the land that it presently holds.
Russia keeps the Crimea.
In addition:
a) Russia maintains Kherson territory east of the Dnieper River that consists of a “shortest route possible land bridge” strip thru Kherson, connecting the Crimea directly to Russia
b) the remaining, presently contested Ukrainian terrority along the border with Russia, that Ukraine has not able to hold, becomes a DE-MILITARIZED ZONE where the Ukraine citizenry can return to, for agricultural activity and support
c) administration and governance of the UKRAINE DE-MILITARIZED ZONE becomes the work of both Ukraine and Russia as neighbors, helping each other to learn how to get along
d) Ukraine does not join NATO
e) Russia surrenders its grip on the Zaporizhzhia nuclear power plant
f) Russia withdraws from Georgia and from all land that Russia seized from Georgia, since the Russian invasion of 2008.
The land Russia would keep even has a similar shape to the Sudetenland. Then six months later, Russia can claim some abuse and bloodlessly take the rest of Ukraine. Good plan. It worked for Hitler.