1. Main line

1. Nf3 d5 2. d4 Bg4

2. Queen's Pawn Game: Chandler Gambit

1. d4 d5 2. Nf3 c5 3. g3 cxd4 4. Bg2

3. Queen's Pawn Game: Chigorin Variation

1. d4 d5 2. Nf3 Nc6

4. Queen's Pawn Game: Krause Variation

1. d4 d5 2. Nf3 c5

5. Queen's Pawn Game: Levitsky Attack, Euwe Variation, Modern Line

1. d4 d5 2. Nf3 c6 3. Bg5 h6 4. Bh4 Qb6