ECO Chess Codes D2 Queen's Gambit Accepted
D20 - Queen's Gambit Accepted
1. d4 d5   
2. c4 dc4

D21
1. d4 d5   
2. c4 dc4   
3. Nf3

D22 - Queen's Gambit Accepted/Alekhine Variation
1. d4 d5   
2. c4 dc4   
3. Nf3 a6   
4. e3

D23 - Queen's Gambit Accepted
1. d4 d5   
2. c4 dc4   
3. Nf3 Nf6

D24
1. d4 d5   
2. c4 dc4   
3. Nf3 Nf6   
4. Nc3

D25
1. d4 d5   
2. c4 dc4   
3. Nf3 Nf6   
4. e3

D26
1. d4 d5   
2. c4 dc4   
3. Nf3 Nf6   
4. e3 e6

D27
1. d4 d5   
2. c4 dc4   
3. Nf3 Nf6   
4. e3 e6   
5. Bc4 c5   
6. O-O a6

D28
1. d4 d5   
2. c4 dc4   
3. Nf3 Nf6   
4. e3 e6   
5. Bc4 c5   
6. O-O a6
7. Qe2

D29
1. d4 d5   
2. c4 dc4   
3. Nf3 Nf6   
4. e3 e6   
5. Bc4 c5   
6. O-O a6
7. Qe2 b5   
8. Bb3 Bb7
ECO Chess Codes
ECO Chess Openings
Chess Notation

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