ENCYCLOPAEDIA OF CHESS OPENINGS
»ECO Code« is a trademark of Chess Informant Inc.

ECO
D10

ECO
D11

ECO
D12

ECO
D13

ECO
D14

1. d4 d5 2. c4 c6

1. d4 d5 2. c4 c6
3. Nf3

1. d4 d5 2. c4 c6
3. Nf3 Nf6 4. e3

1. d4 d5 2. c4 c6
3. Nf3 Nf6
4. cd5

1. d4 d5 2. c4 c6
3. Nf3 Nf6
4. cd5 cd5

without 3. Nf3

without 3... Nf6

without 4... cd5

5. Nc3 Nc6
6. Bf4 Bf5

3... Nf6 without
4. e3, 4. cd5,
4. Nc3

4... cd5 without
5. Nc3

5. Nc3 without
5... Nc6

5... Nc6 without
6. Bf4

6. Bf4 without
6... Bf5

ECO
D15

ECO
D16

ECO
D17

ECO
D18

ECO
D19

1. d4 d5 2. c4 c6
3. Nf3 Nf6 4. Nc3

1. d4 d5 2. c4 c6
3. Nf3 Nf6
4. Nc3 dc4 5. a4

1. d4 d5 2. c4 c6
3. Nf3 Nf6
4. Nc3 dc4

1. d4 d5 2. c4 c6
3. Nf3 Nf6
4. Nc3 dc4

1. d4 d5 2. c4 c6
3. Nf3 Nf6
4. Nc3 dc4

without 4... dc4

without 5... Bf5

5. a4 Bf5

5. a4 Bf5 6. e3

5. a4 Bf5 6. e3 e6 7. Bc4 Bb4
8. 0-0 0-0 9. Qe2

4... dc4 without
5. a4

without 6. e3

without 6... e6

6... e6 without
7. Bc4

7. Bc4 without
7... Bb4

7... Bb4 without
8. 0-0

8. 0-0 without
8... 0-0

8... 0-0 without
9. Qe2