Naturally, the most prevalent move and most crucial to cover is the queen's pawn 1.d4. White's most common choice is the Queen's Gambit, and it's so common and a no-brainer to play it that when asked "what do you play against 1.d4?" the question is almost always referring to the Queen's Gambit with 2.c4 on the next move. Of course multiple moves are able to be played. In fact the rise of 1.d4 systems in modern online play has led to an increased importance for a repertoire that also goes into depth of openings such as the London System, Colle System, Jobava London, and Stonewall setups. Our most principled choice is to copy white. This leaves us extremely flexible and most often heads into either a Queen's Gambit Declined or Slav Defense. Along with 1...Nf6 this is played in around 1/3 of games online, but is surprisingly less common than the Indian complex at master level. This is largely due to the popularity of King's Indian Defense for dynamic win situations, Nimzo-Indians for solid play, and even all the Benoni surprises players pull to try and crack this 1.d4 opening. Our choice, however, demands we begin with 1...d5