ECO Chess Code B5 - Sicilian Defence with 2...d6
B50 - Sicilian Defense 
1. e4 c5   
2. Nf3 d6

B51 - Sicilian Defense, Sicilian Check Variation
1. e4 c5   
2. Nf3 d6   
3. Bb5

B52
1. e4 c5   
2. Nf3 d6   
3. Bb5 Bd7

B53 - Sicilian Defense, Chekhover Variation
1. e4 c5   
2. Nf3 d6   
3. d4 cd4   
4. Qd4

B54 - Sicilian Defense
1. e4 c5   
2. Nf3 d6   
3. d4 cd4   
4. Nd4

B55
1. e4 c5   
2. Nf3 d6   
3. d4 cd4   
4. Nd4 Nf6   
5. f3 e5   
6. Bb5

B56
1. e4 c5   
2. Nf3 d6   
3. d4 cd4   
4. Nd4 Nf6   
5. Nc3

B57 - Sicilian Defense/Sozin Variation
1. e4 c5   
2. Nf3 d6   
3. d4 cd4   
4. Nd4 Nf6   
5. Nc3 Nc6   
6. Bc4

B58 - Sicilian Defense
1. e4 c5   
2. Nf3 d6   
3. d4 cd4   
4. Nd4 Nf6   
5. Nc3 Nc6   
6. Be2

B59 - Sicilian Defense/Boleslavsky Variation
1. e4 c5   
2. Nf3 d6   
3. d4 cd4   
4. Nd4 Nf6   
5. Nc3 Nc6  
6. Be2 e5   
7. Nb3
ECO Chess Codes
Chess Openings
Chess Notation

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