I need to keep this pawn and undoubling black's pawns is bad for me

Looks like I cannot help the undoubling, but I can support my chain

I will recapture with my king if knight takes bishop.

Now I can play Nc5 a more central square attacking two of blacks pawns

I plan to win the exchange if black moves his rook to block the pawn

King supports both pawns, need my knight where it is

That was unexpected

With only one rook on the file now I can push the pawn and freeing the king of protecting that pawn

! I get a pawn creating two isolated pawns, really helps in the end game

This is the move I had two plans for and took the bird in the hand. I figured winning a bishop for a pawn would be better than winning the exchange giving up a pawn. My other idea was to move my knight to a5 by c3 bit figured it would be too slow. Now I think rook b6 is probably best.