Queen's Pawn Game: Symmetrical Variation, Pseudo-Catalan

The Queen's Pawn Game: Symmetrical Variation, Pseudo-Catalan is a chess opening classified under ECO code D02 in the Closed & Semi-Closed Games family, arising from 1.d4 d5, including the Queen's Gambit, Slav Defense, and related systems. It is reached after 3 moves: 1. d4 d5 2. Nf3 Nf6 3. g3. The resulting position leaves black to move.