ECO chess codes B2 - Sicilian Defence
B20 - Sicilian Defense 
1. e4 c5 

B21 - Sicilian Defense/Grand Prix Attack
1. e4 c5
2. f4    

B21 - Sicilian Defense/Smith-Morra Gambit
1. e4 c5
2. d4    

B22 - Sicilian Defense/Alapin Variation
1. e4 c5   
2.c3

B23 - Sicilian Defence/Closed Variation
1. e4 c5  
2. Nc3

B24 
1. e4 c5   
2. Nc3 Nc6   
3. g3

B25 
1. e4 c5   
2. Nc3 Nc6   
3. g3 g6   
4. Bg2 Bg7   
5. d3 d6 

B26 
1. e4 c5   
2. Nc3 Nc6   
3. g3 g6   
4. Bg2 Bg7   
5. d3 d6   
6. Be3  

B27 - Sicilian Defense 
1. e4 c5   
2. Nf3  

B28 - Sicilian Defense/O'Kelly Variation
1. e4 c5   
2. Nf3 a6  

B29 - Sicilian Defence/Nimzovitch Variation
1. e4 c5   
2. Nf3 Nf6 

ECO Chess Codes
Chess Openings
Chess Notation

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