A25: English, closed system (without ...d6)

A25 Sub-variants:

• English, Sicilian reversed
  1. c4 e5 2. Nc3 Nc6
• English, closed system
  1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7
• English, closed, Taimanov variation
  1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. e3 d6 6. Nge2 Nh6
• English, closed, Hort variation
  1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. e3 d6 6. Nge2 Be6
• English, closed, 5.Rb1
  1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Rb1
• English, closed, 5.Rb1 Taimanov variation
  1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. Rb1 Nh6
• English, closed system (without ...d6)
  1. c4 e5 2. Nc3 Nc6 3. g3 g6 4. Bg2 Bg7 5. d3