Hungarian defense (C50)

1. e4 e5 2. Nf3 Nc6 3. Bc4 Be7

Hungarian defense (C50)

Tartakower variation

1. e4 e5 2. Nf3 Nc6 3. Bc4 Be7 4. d4 exd4 5. c3 Nf6 6. e5 Ne4

Inverted Hungarian (C44)

1. e4 e5 2. Nf3 Nc6 3. Be2

Sicilian (B27)

Hungarian variation

1. e4 c5 2. Nf3 g6

Gruenfeld (D97)

Russian, Alekhine (Hungarian) variation

1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 a6

KGA (C36)

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

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

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

Ruy Lopez (C79)

Steinitz defense deferred (Russian defense)

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

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

Sicilian defense (B20)

1. e4 c5

QGD (D06)

Marshall defense

1. d4 d5 2. c4 Nf6

QGD (D07)

Chigorin defense

1. d4 d5 2. c4 Nc6

QGD Slav defense (D10)

1. d4 d5 2. c4 c6

Alekhine's defense (B03)

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. c4

KP (B00)

Nimzovich defense

1. e4 Nc6 2. d4

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

Pirc defense (B07)

1. e4 d6 2. d4 Nf6 3. Nc3

Pirc defense (B07)

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