ORIGINAL: Flaviusx
I think you are being unduly cautious here. These rivers aren't going to stay frozen forever, you need to get some attacks going. Those Romanians are as tasty a target as any, I doubt you'll find something better.
You've already waited until January and lost a good month of winter campaigning. (I would have started attacking in December with whatever I had in hand and done my corps conversions on the fly.) Those reserves need to get into the action and trained up ASAP.
As for getting them cut off, just advance cautiously, and only with rifle units. Don't let your mobile forces ever end the turn next to enemy lines. Not for a while, anyways. They should scoot to the rear at the end of the Soviet turn and be in a position to break up any Axis attacks.
The biggest mistake a lot of Soviet players are making in this mid war period is prematurely introducing mobile forces into breakthrough operations. They haven't got the chops to do this against a good German defense. As unexciting as this may be, the Soviet has to settle with gradual crumbling attacks for quite some time.
Good advice.
You need to be attacking on a wide front during 43, basicly weakening the German army. Your not going to be able to get pockets during 43, grind down German morale and build yours. Attack where ever possible. If you do as Flaviusx advises keeping mech units 4 to 8 hexes from front and a few rifle corps you will not have an issue breaking a pocket.
German player might get a few small pockets during 43 , but they are not game changers.
Start grinding asap.












