Queen's Pawn Game: Modern Defense is a chess opening with the ECO code A40, part of the Queen's Pawn Game family. It goes 1. d4 g6. White opens with 1. d4 (the queen's pawn) and Black answers 1... g6. After 2 moves it is White to move. The lesson on the board explains every move of the line and lets you play it yourself; it is free.
White opens with 1.d4 and plays a system without an early c4. It covers many calm setups like the Colle, London and Zukertort ideas.