ECO chess codes D0

D00 - Double Queen Pawn Game
1. d4 d5

D01 - Veresov System
1. d4 d5   
2. Nc3 Nf6   
3. Bg5

D02 - Double Queen Pawn Game 
1. d4 d5   
2. Nf3

D03 
1. d4 d5   
2. Nf3 Nf6   
3. Bg5

D04 - Colle System
1. d4 d5   
2. Nf3 Nf6   
3. e3

D05
1. d4 d5   
2. Nf3 Nf6   
3. e3 e6

D06 - Queen's Gambit
1. d4 d5   
2. c4

D07 - Queen's Gambit/Tchigorin Variation
1. d4 d5   2. c4 Nc6

D08 - Queen's Gambit/Albin Counter Gambit
1. d4 d5   
2. c4 e5

D09
1. d4 d5   
2. c4 e5   
3. de5 d4   
4. Nf3 Nc6   
5. g3