Nimzo-Indian (E21)

Three knights, Korchnoi variation

1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. Nf3 c5 5. d5

Sicilian (B23)

Closed, Korchnoi variation

1. e4 c5 2. Nc3 e6 3. g3 d5

Dutch, Korchnoi attack (A80)

1. d4 f5 2. h3

Alekhine's defense (B03)

Four pawns attack, Korchnoi variation

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4 Nb6 5. f4 dxe5 6. fxe5 Bf5 7. Nc3 e6 8. Nf3 Be7 9. Be2 O-O 10. O-O f6

English (A16)

Anglo-Gruenfeld defense, Korchnoi variation

1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. Nf3 g6 5. g3 Bg7 6. Bg2 e5

Four knights (C48)

Spanish variation

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

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

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

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

Four knights (C46)

Gunsberg variation

1. e4 e5 2. Nf3 Nc6 3. Nc3 Nf6 4. a3

Four knights (C47)

Scotch variation

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

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 (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)

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

Three knights (C46)

Schlechter variation

1. e4 e5 2. Nf3 Nc6 3. Nc3 Bb4 4. Nd5 Nf6

Gruenfeld (D90)

Three knights variation

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

Gruenfeld (D90)

Three knights variation

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