KGA (C36)

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

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

KGA (C36)

Abbazia defense, Modern variation

1. e4 e5 2. f4 exf4 3. Nf3 d5 4. exd5 Nf6

KGA (C36)

Abbazia defense, Botvinnik variation

1. e4 e5 2. f4 exf4 3. Nf3 d5 4. exd5 Nf6 5. Bb5+ c6 6. dxc6 bxc6 7. Bc4 Nd5

Modern defense (A40)

1. d4 g6

Modern defense (A41)

1. d4 d6 2. c4 g6 3. Nc3 Bg7

Robatsch (Modern) defense (B06)

1. e4 g6 2. d4 Bg7 3. Nc3 d6

Robatsch (Modern) defense (B06)

1. e4 g6

Robatsch (Modern) defense (B06)

1. e4 g6 2. d4 Bg7

Ruy Lopez (C75)

Modern Steinitz defense

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c3 Bd7

Ruy Lopez (C72)

Modern Steinitz defense, 5.O-O

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

Ruy Lopez (C74)

Modern Steinitz defense

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6 5. c3

Modern defense (A42)

Averbakh system

1. d4 d6 2. c4 g6 3. Nc3 Bg7 4. e4

Alekhine's defense (B05)

Modern variation, 4...Bg4

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Bg4

Ruy Lopez (C71)

Modern Steinitz defense

1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Ba4 d6

Alekhine's defense (B04)

Modern variation

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3

Alekhine's defense (B04)

Modern, Keres variation

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 g6 5. Bc4 Nb6 6. Bb3 Bg7 7. a4

Alekhine's defense (B05)

Modern, Panov variation

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Bg4 5. h3

Alekhine's defense (B04)

Modern, Fianchetto variation

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 g6

Alekhine's defense (B04)

Modern, Schmid variation

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Nb6

Alekhine's defense (B05)

Modern, Flohr variation

1. e4 Nf6 2. e5 Nd5 3. d4 d6 4. Nf3 Bg4 5. Be2 c6