B40: Sicilian, Pin, Koch variation

B40 Sub-variants:

• Sicilian defence
  1. e4 c5 2. Nf3 e6
• Sicilian, Marshall variation
  1. e4 c5 2. Nf3 e6 3. d4 d5
• Sicilian defence
  1. e4 c5 2. Nf3 e6 3. d4 cxd4
• Sicilian, Anderssen variation
  1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6
• Sicilian, Pin variation (Sicilian counter-attack)
  1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Bb4
• Sicilian, Pin, Jaffe variation
  1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Bb4 6. Bd3 e5
• Sicilian, Pin, Koch variation
  1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Bb4 6. e5