As it turns out, the Soviets do actually have quite a few units with quite a few movement points, which (at least potentially) provides an opportunity to deal with an individual unit snaking deep into Soviet territory.
Given the opportunity, I decided to take it. I sent a large number of divisions north to encircle and try to eliminate the German motorized division - at first about 1 and a half armies, and the next turn up to two (or even a bit more) Soviet armies.
Why did I do this?
First of all, because it seemed like it ought to be possible. This motorized division was presumably the Totenkopf motorized division, which had fought several battles the last turn and consequently was presumably not that fresh. In addition, as mentioned in the previous post, the other German mobile divisions had also fought a lot the previous turn, and were all pretty far away. So I thought they would have a tough time quickly coming to help with the German mobile divisions.
Secondly, part of the reason for doing it was simply to test whether or not it was possible to punish Germany for snaking forward with a single division all by itself. I honestly don't know (or didn't know when I did this, which at this point is a few turns ago) whether it was possible at this stage in the game to actually eliminate an encircled German mobile division.
Thirdly, I thought that it would make this game more interesting. What I could have done is simply kept up a slow cautious retreat, and at this point in the game it seems like Germany is significantly behind historical schedule, so I could probably just have taken the easy and straightforward approach for a "win." The risk of doing this was, necessarily, I had to weaken my defense of Pskov a bit to send so many divisions to the Baltic. So the risk was that I could lose Pskov more quickly.
Fourthly, part of the reason to do this was simply to seize the initiative and attempt to distract Germany from Pskov. Having encircled this division, and not just encircled it 1 hex behind the lines but 3-4 hexes behind, I knew that if AtAtack wanted to break out the division without losing it, he would have to divert a large amount of troops, presumably including many or all of his 5 other less-than-fresh mobile divisions. If they went to Estonia, they would not be attacking Pskov, and would be out of position to attack along the double rail line through Pskov afterwards.
I actually wasn't totally sure how AtAtack would react to this. Maybe he would divert a lot to try to rescue the division, or maybe he would abandon it and just keep pushing straight through to Pskov.
