Su[I05] cannot get there, it would have to move [start[J09]-J08-K07-K06-J06 or start[J09]-K08-K07-K06-J06. If you went through I07/I06 you would have made it, If you want to go that way a reroll will be needed. Wall in[07] blocks movement.
Su[K09] that didn't get through J07 should be in K06 or K07 or J08 or I07, which one?
That's what I said speed 4 if you look at the diagram the way you would have had to get to J06 has you going through J07 which you cannot do unless you roll, see page 5 HBF Stalingrad42 10m Rules of Engagement under Unit Movement. Vehicles are prohibited from entering or moving through a hex with 3 Craters, Factory Walls[J07] or Support Columns. A vehicle may, however, attempt a movement roll (4,5 or6) to smash through a section of wall or column. You would had to use the green or white lines.
If however you wanted to go through J07[the red line] I would permit that.
Now i understand the problem with J7. The movement roll could be for J7 wall. Then could get I5. But i tried to break with the 2nd Marder the same wall. Could i break another one?
Well technically K10 also had a wall in the hex, but I let that go. J07 has a wall in the hex.
Your black line which you are showing has that SU going through I7, but you wrote J7 which has a wall in the hex, also on your map you posted has the SU stopped in J7 which has a wall.
Now i understand the problem with J7. The movement roll could be for J7 wall. Then could get I5. But i tried to break with the 2nd Marder the same wall. Could i break another one?
Cool, I will let you go through J7 but the wall in J6 stays intact, if that works.