Polish defense (A40)

1. d4 b5

Polish (Sokolsky) opening (A00)

1. b4

Polish (A00)

Tuebingen variation

1. b4 Nh6

Polish (A00)

Outflank variation

1. b4 c6

Nimzovich-Larsen attack (A01)

Polish variation

1. b3 b5

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

French defense (C00)

1. e4 e6 2. Nc3

KP (B00)

Neo-Mongoloid defense

1. e4 Nc6 2. d4 f6

QGD (D32)

Tarrasch defense

1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3

KGD (C30)

Mafia defense

1. e4 e5 2. f4 c5

Scandinavian defense (B01)

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

QGD (D56)

Lasker defense

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 h6 7. Bh4 Ne4

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 2. e5 Nd5

Alekhine's defense (B02)

1. e4 Nf6