Dacha Tactics #9 - yearning for dark rebuild!

White has lots of passed pawns -- it should be simple to win! Except that Black has a strong blockade on the dark-squares, preventing us from advancing to promote. If we can break this blockade, then we win with our passed pawns! Therefore, it's time to march in some dark support...

Interact with the puzzle below. If you get stuck, you can always click the "lightbulb" icon in the lower-left of the puzzle frame. Good luck!