Sicilian (B28)

O'Kelly variation

1. e4 c5 2. Nf3 a6

Nimzo-Indian (E26)

Saemisch, O'Kelly variation

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3 c5 6. e3 b6

King's Indian (E97)

Orthodox, Aronin-Taimanov variation (Yugoslav attack / Mar del Plata variation)

1. d4 Nf6 2. c4 g6 3. Nc3 Bg7 4. e4 d6 5. Nf3 O-O 6. Be2 e5 7. O-O Nc6

KGD (C30)

Norwalde variation

1. e4 e5 2. f4 Qf6

QGA (D22)

Haberditz variation

1. d4 d5 2. c4 dxc4 3. Nf3 a6 4. e3 b5

QGD (D51)

Rochlin variation

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. Nf3 c6 6. Rc1 Qa5 7. Bd2

QGA (D23)

Mannheim variation

1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. Qa4+

QGA, Bogolyubov variation (D24)

1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. Nc3 a6 5. e4

QGA, Smyslov variation (D25)

1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 g6

QGD (D51)

Alekhine variation

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. Nf3 c6 6. e4

QGA (D21)

Ericson variation

1. d4 d5 2. c4 dxc4 3. Nf3 b5

QGA (D20)

Linares variation

1. d4 d5 2. c4 dxc4 3. e4 c5 4. d5 Nf6 5. Nc3 b5

QGD (D50)

Been-Koomen variation

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 c5

QGD (D37)

Classical variation (5.Bf4)

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 Be7 5. Bf4

QGD (D38)

Ragozin variation

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 Bb4

QGD (D59)

Tartakower variation

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 h6 7. Bh4 b6 8. cxd5 Nxd5 9. Bxe7 Qxe7 10. Nxd5 exd5 11. Rc1 Be6

KGD (C30)

Classical variation

1. e4 e5 2. f4 Bc5

QGD (D51)

Manhattan variation

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3 Bb4

Sicilian (B41)

Kan variation

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 a6

QGA, Flohr variation (D25)

1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 Be6