Catalan Opening Open Defense Discovered Attack Beginner Chess Puzzles

In the Catalan Opening Open Defense, White often plays 1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 dxc4, creating an open queenside structure where the c4-pawn can become a tactical target. The discovered attack theme appears when a bishop, rook, or queen move uncovers a line on the c-file, long diagonal, or e-file, often against an exposed king or loose piece.