ECO chess codes B4 - Sicilian Defense with 2...e6
B40 - Sicilian Defense 
1. e4 c5   
2. Nf3 e6

B41 - Sicilian Defence/Kan Variation
1. e4 c5   
2. Nf3 e6   
3. d4 cd4   
4. Nd4 a6

B42 
1. e4 c5   
2. Nf3 e6   
3. d4 cd4   
4. Nd4 a6   
5. Bd3

B43 
1. e4 c5   
2. Nf3 e6   
3. d4 cd4   
4. Nd4 a6   
5. Nc3

B44 - Sicilian Defense/Taimanov Variation
1. e4 c5   
2. Nf3 e6   
3. d4 cd4   
4. Nd4 Nc6

B45 
1. e4 c5   
2. Nf3 e6   
3. d4 cd4   
4. Nd4 Nc6   
5. Nc3

B46 
1. e4 c5   
2. Nf3 e6   
3. d4 cd4   
4. Nd4 Nc6   
5. Nc3 a6

B47 
1. e4 c5   
2. Nf3 e6   
3. d4 cd4   
4. Nd4 Nc6   
5. Nc3 Qc7

B48
1. e4 c5   
2. Nf3 e6   
3. d4 cd4   
4. Nd4 Nc6   
5. Nc3 Qc7   
6. Be3

B49 
1. e4 c5   
2. Nf3 e6   
3. d4 cd4   
4. Nd4 Nc6   
5. Nc3 Qc7 
6. Be3 a6   
7. Be2

ECO Chess Codes
Chess Notation
Chess Openings

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