Benko Gambit Empty Square Sacrifice Chess Puzzles

The Benko Gambit Empty Square Sacrifice is the hallmark pawn sacrifice in the Benko Gambit, usually after 1.d4 Nf6 2.c4 c5 3.d5 b5. Black gives up the b-pawn, often with ...b4 and ...a6, to open files and target the long diagonal and queenside squares that White has left weak. The idea is not immediate material recovery, but long-term control of the empty squares on the a- and b-files, especially a4, b3, and c4.