ECO chess codes E5 (idea)

E50 - Nimzo-Indian Defence/Rubinstein Variation
1. d4 Nf6   
2. c4 e6   
3. Nc3 Bb4   
4. e3 O-O   
5. Nf3

E51
1. d4 Nf6 
2. c4 e6 
3. Nc3 Bb4 
4. e3 O-O 
5. Nf3 d5

E52 - Nimzo-Indian Defence/Rubinstein Variation/Tal System
1. d4 Nf6 
2. c4 e6 
3. Nc3 Bb4 
4. e3 O-O 
5. Nf3 d5 
6. Bd3 b6

E53 - Nimzo-Indian Defence/Rubinstein Variation
1. d4 Nf6   
2. c4 e6   
3. Nc3 Bb4   
4. e3 O-O   
5. Nf3 d5
6. Bd3 c5

E54
1. d4 Nf6   
2. c4 e6   
3. Nc3 Bb4   
4. e3 O-O   
5. Nf3 d5
6. Bd3 c5   
7. O-O dc4   
8. Bc4

E55 - Nimzo-Indian Defence/Rubinstein Variation/Parma System
1. d4 Nf6   
2. c4 e6   
3. Nc3 Bb4   
4. e3 O-O   
5. Nf3 d5
6. Bd3 c5   
7. O-O dc4   
8. Bc4 Nbd7

E56 - Nimzo-Indian Defence/Main Line Rubinstein Variation
1. d4 Nf6   
2. c4 e6   
3. Nc3 Bb4   
4. e3 O-O   
5. Nf3 d5
6. Bd3 c5   
7. O-O Nc6

E57
1. d4 Nf6   
2. c4 e6   
3. Nc3 Bb4   
4. e3 O-O   
5. Nf3 d5
6. Bd3 c5   
7. O-O Nc6   
8. a3 dc4   
9. Bc4 cd4

E58
1. d4 Nf6   
2. c4 e6   
3. Nc3 Bb4   
4. e3 O-O   
5. Nf3 d5
6. Bd3 c5   
7. O-O Nc6   
8. a3 Bc3   
9. bc3

E59
1. d4 Nf6   
2. c4 e6   
3. Nc3 Bb4   
4. e3 O-O   
5. Nf3 d5
6. Bd3 c5   
7. O-O Nc6   
8. a3 Bc3   
9. bc3 dc4    
10. Bc4

ECO Chess Codes
Chess Openings