This is not a position I often reach. I love it.

White has played all of his useful pawn breaks towards the center - as supporting cast.

Gains a pawn.

The dark squared bishop is now supreme.

White worked hard to reduce the value of the dark squared bishop - but his c3 pawn weakness is on an open file. Being able to point my rooks at c3 and have Be7 pointing at b4 makes some tactics to gain a pawn on that strong chain.

a6 is the queenside pawn weakness, if I break the queensides pawns, and get a rook behind whites pawn structure, I will need to be able to defend a6 or else I'll lose a pawn trying to save the dark squared bishop after Bxb4, Bxa5 Ra1 and a6 falls. This square is best - and right now I need to do some rearranging to get my rooks on the c file.

To allow me to play Qa7. Bb7 is still the best square, but this is allowable as long as the queen stays on a7

I have firm control of the pawn breaks. White has to push all of his defense and energy to c3. I'm looking to catch either a rook out of place, or his king too many moves from his pawns.

Allowing attacks on e5 and b4 - with hopes of drawing the king away and allowing a pawn break with a tempo to play a rook to the h file. - any response to the h file rook opens up the c files tactics.

supporting a6 once again.