ECO Chess Codes D6 - Queen's Gambit Declined/Orthodox Defence with 4. Bg5, main line
D60 - Queen's Gambit Declined, Orthodox Defence
1. d4 d5   
2. c4 e6   
3. Nc3 Nf6   
4. Bg5 Be7   
5. e3 O-O  
6. Nf3 Nbd7

D61 - Queen's Gambit Declined/Orthodox Defence/Rubinstein Variation
1. d4 d5 
2. c4 e6 
3. Nc3 Nf6 
4. Bg5 Be7 
5. e3 O-O 
6. Nf3 Nbd7 
7. Qc2

D62
1. d4 d5   
2. c4 e6   
3. Nc3 Nf6   
4. Bg5 Be7   
5. e3 O-O
6. Nf3 Nbd7   
7. Qc2 c5   
8. dc5

D63 - Queen's Gambit Declined/Orthodox Defence
1. d4 d5   
2. c4 e6   
3. Nc3 Nf6   
4. Bg5 Be7   
5. e3 O-O
6. Nf3 Nbd7   
7. Rc1

D64 - Queen's Gambit Declined/Orthodox Defence/Tempo-Struggle Variation
1. d4 d5   
2. c4 e6   
3. Nc3 Nf6   
4. Bg5 Be7   
5. e3 O-O  
6. Nf3 Nbd7   
7. Rc1 c6   
8. Qc2

D65
1. d4 d5   
2. c4 e6   
3. Nc3 Nf6   
4. Bg5 Be7   
5. e3 O-O
6. Nf3 Nbd7   
7. Rc1 c6   
8. Qc2 a6   
9. cd5

D66 - Queen's Gambit Declined/Orthodox Defence/Main Variation
1. d4 d5   
2. c4 e6   
3. Nc3 Nf6   
4. Bg5 Be7   
5. e3 O-O
6. Nf3 Nbd7   
7. Rc1 c6 8. Bd3

D67 - Queen's Gambit Declined/Orthodox Defence/ Capablanca System
1. d4 d5   
2. c4 e6   
3. Nc3 Nf6   
4. Bg5 Be7   
5. e3 O-O
6. Nf3 Nbd7   
7. Rc1 c6   
8. Bd3 dc4   
9. Bc4 Nd5

D68
1. d4 d5   
2. c4 e6   
3. Nc3 Nf6   
4. Bg5 Be7   
5. e3 O-O  
6. Nf3 Nbd7   
7. Rc1 c6   
8. Bd3 dc4   
9. Bc4 Nd5    
10. Be7 Qe7 
11. O-O Nc3   
12. Rc3 e5

D69
1. d4 d5   
2. c4 e6   
3. Nc3 Nf6   
4. Bg5 Be7   
5. e3 O-O  
6. Nf3 Nbd7  
7. Rc1 c6   
8. Bd3 dc4   
9. Bc4 Nd5    
10. Be7 Qe7 
11. O-O Nc3   
12. Rc3 e5   
13. de5 Ne5   
14. Ne5 Qe5
ECO Chess Codes
Chess Notation
Chess Openings