Let's beat the Benko Gambit! I play 1. d4 as White and I have success against almost all Black defences, except the Benko Gambit, where I score about 30%.

My style is that I like solid, closed, positional games if I can, but I can handle myself tactically too. However I find that I lag behind in development, and to make matters worse, even if I reach an endgame, the Benko structure is quite solid, so even here Black has good chances.

Can you suggest a variation for White that leads to a solid, positional game against the Benko Gambit?

My elo is 2050.
I play Benko as black and am a FM. The most trouble I have in quick games is with declined cxb5 a6 b6 line. Without the a line open I just do not have the play that Benko player craves.

Also, I noticed that stronger(IM+) players tend to go for the b6 line, while weaker players either take the pawn on a6 or decline the gambit with something else. For example allowing black to push to b4 has been good for me as black.