A COMPREHENSIVE UKRAINE SITUATION REPORT: Russia-Ukraine Warning Update: Russian Offensive Campaign Assessment, February 26.

Key Takeaways

Russia has failed to encircle and isolate Kyiv with the combination of mechanized and airborne attacks as it had clearly planned to do. Russian forces are now engaging in more straightforward mechanized drives into the capital along a narrow front along the west bank of the Dnipro River and toward Kyiv from a broad front to the northeast.
Russian forces have temporarily abandoned failed efforts to seize Chernihiv and Kharkiv to the northeast and east of Kyiv and are bypassing those cities to continue their drive on Kyiv. Russian attacks against both cities appear to have been poorly designed and executed and to have encountered more determined and effective Ukrainian resistance than they expected.
Russian movements in eastern Ukraine remain primarily focused on pinning the large concentration of Ukrainian conventional forces arrayed along the former line of contact in the east, likely to prevent them from interfering with Russian drives on Kyiv and to facilitate their encirclement and destruction.
Russian forces coming north from Crimea halted their drive westward toward Odesa, and Ukrainian forces have retaken the critical city of Kherson. Some Russian troops remain west of the Dnipro River and are advancing on Mikolayiv, but the main axes of advance have shifted to the north and east toward Zaporizhie and Mariupol respectively.
Russian forces have taken the critical city of Berdyansk from the west, threatening to encircle Mariupol even as Russian forces based in occupied Donbas attack Mariupol from the east, likely to pin defenders in the city as they are encircled.
Russian successes in southern Ukraine are the most dangerous and threaten to unhinge Ukraine’s successful defenses and rearguard actions to the north and northeast.
Russian troops are facing growing morale and logistics issues, predictable consequences of the poor planning, coordination, and execution of attacks along Ukraine’s northern border.

Russia has surprisingly failed to gain air superiority or ground the Ukrainian air force after three days of fighting.

Much, much more at the link. Make of this what you will, bearing in mind that all reports are uncertain in wartime.