(E20) Steiner
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. g3
(E20) Mikenas
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Qd3
(E20) Kmoch
1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. f3