Dutch (A82)

Balogh defense

1. d4 f5 2. e4 d6

Alekhine's defense (B03)

Balogh variation

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Bc4

Budapest (A52)

Alekhine variation, Balogh gambit

1. d4 Nf6 2. c4 e5 3. dxe5 Ng4 4. e4 d6

QGD (D08)

Albin counter-gambit, Balogh variation

1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. Nbd2 Qe7

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 (B27)

1. e4 c5 2. Nf3

KP (B00)

Neo-Mongoloid defense

1. e4 Nc6 2. d4 f6

Two knights defense (C58)

1. e4 e5 2. Nf3 Nc6 3. Bc4 Nf6 4. Ng5 d5 5. exd5 Na5 6. Bb5+ c6 7. dxc6 bxc6 8. Be2

Scandinavian defense (B01)

1. e4 d5 2. exd5 Qxd5 3. Nc3 Qa5 4. d4 Nf6 5. Nf3 Bf5

Norwegian defense (B06)

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

Sicilian defense (B40)

1. e4 c5 2. Nf3 e6

Scandinavian defense (B01)

1. e4 d5 2. exd5 Nf6

Scandinavian defense (B01)

1. e4 d5 2. exd5 Nf6 3. d4

Alekhine's defense (B02)

1. e4 Nf6

Hippopotamus defense (B00)

1. e4 Nh6 2. d4 g6 3. c4 f6

QGD (D60)

Orthodox defense

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7