English (A28)

Four knights, Romanishin variation

1. c4 e5 2. Nc3 Nc6 3. Nf3 Nf6 4. e3 Bb4 5. Qc2 Bxc3

Ponziani (C44)

Romanishin variation

1. e4 e5 2. Nf3 Nc6 3. c3 Be7

Scotch (C45)

Romanishin variation

1. e4 e5 2. Nf3 Nc6 3. d4 exd4 4. Nxd4 Bc5 5. Nb3 Bb4+

English (A17)

Queens Indian, Romanishin variation

1. c4 Nf6 2. Nc3 e6 3. Nf3 b6 4. e4 Bb7 5. Bd3

English (A13)

Romanishin gambit

1. c4 e6 2. Nf3 Nf6 3. g3 a6 4. Bg2 b5

Nimzo-Indian (E20)

Romanishin-Kasparov (Steiner) system

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. g3

Three knights (C46)

Steinitz variation

1. e4 e5 2. Nf3 Nc6 3. Nc3 g6

Four knights (C46)

Italian variation

1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bc4

Gruenfeld (D90)

Three knights variation

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3

Four knights (C47)

Scotch variation

1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. d4

Four knights (C48)

Spanish variation

1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5

Four knights (C48)

Ranken variation

1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 a6 5. Bxc6

Four knights (C48)

Spielmann variation

1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 a6 5. Bxc6 dxc6 6. Nxe5 Nxe4 7. Nxe4 Qd4 8. O-O Qxe5 9. Re1 Be6 10. d4 Qd5

Four knights (C49)

Janowski variation

1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 Bxc3 7. bxc3 d6 8. Re1

Four knights (C49)

Symmetrical variation

1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 d6

Four knights (C48)

Bardeleben variation

1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bc5 5. O-O O-O 6. Nxe5 Nxe5 7. d4 Bd6 8. f4 Nc6 9. e5 Bb4

Four knights (C48)

Marshall variation

1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bc5 5. O-O O-O 6. Nxe5 Nd4

Four knights (C49)

Alatortsev variation

1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 Qe7 7. Ne2 d5

Gruenfeld (D90)

Three knights variation

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7

Four knights (C49)

Svenonius variation

1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. Bb5 Bb4 5. O-O O-O 6. d3 Bxc3 7. bxc3 d5