Czech Benoni defense (A56)

1. d4 Nf6 2. c4 c5 3. d5 e5

QGD Slav (D17)

Czech defense

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5

English (A16)

Anglo-Gruenfeld, Czech defense

1. c4 Nf6 2. Nc3 d5 3. cxd5 Nxd5 4. g3 g6 5. Bg2 Nb6

Czech Benoni (A56)

King's Indian system

1. d4 Nf6 2. c4 c5 3. d5 e5 4. Nc3 d6 5. e4 g6

KGA (C36)

Abbazia defense (Classical defense, Modern defense[!])

1. e4 e5 2. f4 exf4 3. Nf3 d5

Ruy Lopez (C79)

Steinitz defense deferred (Russian defense)

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 Nf6 5. O-O d6

Two knights defense (C57)

Fegatello attack, Polerio defense

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Nxd5 6. Nxf7 Kxf7 7. Qf3+ Ke6 8. Nc3 Ne7

Three knights (C46)

Winawer defense (Gothic defense)

1. e4 e5 2. Nf3 Nc6 3. Nc3 f5

Alekhine's defense (B02)

Brooklyn defense

1. e4 Nf6 2. e5 Ng8

QGD Slav defense (D10)

1. d4 d5 2. c4 c6

QGD (D07)

Chigorin defense

1. d4 d5 2. c4 Nc6

QGA (D20)

Schwartz defense

1. d4 d5 2. c4 dxc4 3. e4 f5

QGD (D06)

Marshall defense

1. d4 d5 2. c4 Nf6

Two knights defense (C58)

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5

Norwegian defense (B06)

1. e4 g6 2. d4 Nf6 3. e5 Nh5 4. g4 Ng7

Robatsch defense (B06)

1. e4 g6 2. d4 Bg7 3. Nc3

French defense (C00)

1. e4 e6 2. Nc3

Pirc defense (B07)

1. e4 d6 2. d4 Nf6 3. Nc3

Pirc defense (B07)

1. e4 d6 2. d4 Nf6 3. Nc3 g6

Pirc defense (B07)

1. e4 d6 2. d4 Nf6 3. Nc3 g6 4. Be2