Catalan Middlegame (1.d4 Nf6 2.c4 e6 3.g3 / 1.d4 Nf6 2.c4 e6 3.g3 d5) Chess Puzzles

In chess, “catalan middlegame” is not a single ECO variation with one fixed move order; it describes the middlegame arising from the Catalan setup, typically 1.d4 Nf6 2.c4 e6 3.g3 d5, where White fianchettoes the bishop to g2. Its defining feature is the g3–Bg2 bishop pressing along the long diagonal while White controls d4 and c4; the character changes sharply after Black captures on c4 in an Open Catalan or maintains the tension in a Closed Catalan.