(A28) Marini
1. c4 e5 2. Nc3 Nc6 3. Nf3 Nf6 4. a3
(A28) Nimzovich
1. c4 e5 2. Nc3 Nc6 3. Nf3 Nf6 4. e4
(A28) Bradley Beach
1. c4 e5 2. Nc3 Nc6 3. Nf3 Nf6 4. d4 e4
(A28) Nenarokov
1. c4 e5 2. Nc3 Nc6 3. Nf3 Nf6 4. d4 exd4 5. Nxd4 Bb4 6. Bg5 h6
(A28) Capablanca
1. c4 e5 2. Nc3 Nc6 3. Nf3 Nf6 4. d3
(A28) Stean
1. c4 e5 2. Nc3 Nc6 3. Nf3 Nf6 4. e3 Bb4 5. Qc2 O-O 6. Nd5 Re8 7. Qf5
(A28) Romanishin
1. c4 e5 2. Nc3 Nc6 3. Nf3 Nf6 4. e3 Bb4 5. Qc2 Bxc3