Strategy level #19 doesn't seem to be solveable. Does anyone know if it is?

Yes, it's solvable and the difficulty is exactly the same as this level:

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Select  Level: '
Notice' Nr: 0 Collection: ' test in C'

(Level 4 from "Sokoban for windows" v1.5 Hard)

How do you solve that level???

Here's a solution to level 4:

thanks man!