A81: Dutch, Leningrad, Basman system

A81 Sub-variants:

• Dutch defence
  1. d4 f5 2. g3
• Dutch defence, Blackburne variation
  1. d4 f5 2. g3 Nf6 3. Bg2 e6 4. Nh3
• Dutch defence
  1. d4 f5 2. g3 Nf6 3. Bg2 g6
• Dutch, Leningrad, Basman system
  1. d4 f5 2. g3 g6 3. Bg2 Bg7 4. Nf3 c6 5. O-O Nh6
• Dutch, Leningrad, Karlsbad variation
  1. d4 f5 2. g3 g6 3. Bg2 Bg7 4. Nh3