ah..so it's the funny eagle in the center that is the crux for attacking otzher commanders (who the hell is that tchec commander in the south??). Not immediately clear in the legend.
Now I see what the gameconept is..hmmm, nay.
It is very hard to race from a commander to the Warschau center..then you'd supposed to have enough resources left to attack a commander's heart position (bulking with troops of course)..IF the first is lucky to succeed to eliminate one other commander, he has almost NO RESOURCES left,and a THIRD commander throws in his troops on warschau and knocks out the first... and so it goes like a chain reaction.
Not nice game play..
Why not this idea:
Three (or four) Nazi commanders starting from Germany.. and four Polish commanders INSIDE Poland.
Soviet commanders/armies are neutral.
Once a Nazi player reaches the east side of the map (a particular territory) that territory (in his colour) gets +2 auto troops (if player controls nazi_A and Soviet_b then +2...so not for the 'polish' players).
Like checkers..you reach the other side of the board and you get a bonus checker.
This simulates the effect that soviet forces would not start to invade before it was clear that the nazis would totally win poland.
The downside is that on this map the nazi and soviet troops have the same colour of player...
but effectively the poles fought againt the nazis and soviets..the soviets didnot fight the nazis.
The soviet troops acted like an accessory to the nazis..really..
So i think that is better for this particular 1939 map.
ONLY Having/or keeping Warzau should mean a relatively immense bonus...the poles keeping it means "motivation/spirit" (= bonustroops in warzau), for the nazi player having warzau means they "win", lifted spirit, time for reorganisation for final mopping up actions (= bonustroops at the starting position..but much less).
Finding the right balance in this bonus for each player is the trick.
Something like that.

Barbarus hic ego sum, quia non intellegor ulli.