(A56) Vulture
1. d4 Nf6 2. c4 c5 3. d5 Ne4
(A56) Hromádka
1. d4 Nf6 2. c4 c5 3. d5 d6
(A56) Fianchetto
1. d4 Nf6 2. c4 c5 3. d5 g6
(A56) Czech
1. d4 Nf6 2. c4 c5 3. d5 e5
(A56) Czech (King's Indian)
1. d4 Nf6 2. c4 c5 3. d5 e5 4. Nc3 d6 5. e4 g6