A57-A59
10 named lines in this family, ECO A57-A59. Every one of them opens 1. d4 Nf6 2. c4 c5, so the notes on those moves are written once, just below, instead of once per line. Under each line you get its moves and the sentences it adds that this page has not already printed. A line's own page carries up to its first 4 per-move notes in full.
1. d4 Nf6 2. c4 c5
1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6
An early pawn trade leaves the b-file as Black's avenue and the c-file as White's - both sides get real winning chances down their own file. White is up material out of the opening - Black is banking on activity to show for it.
1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. f3
1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. e3
1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. b6
White's pawn has already reached b6.
1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6
White has doubled pawns on the a-file.
1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 g6 6. Nc3 Bxa6 7. f4
1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 g6 6. Nc3 Bxa6 7. g3 d6 8. Bg2 Bg7 9. Nf3
White's kingside bishop takes the long diagonal and Black's kingside bishop takes the long diagonal.
1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 Bxa6 6. Nc3 d6 7. e4
1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 g6 6. Nc3 Bxa6 7. e4 Bxf1 8. Kxf1 d6 9. Nge2
1. d4 Nf6 2. c4 c5 3. d5 b5 4. cxb5 a6 5. bxa6 g6 6. Nc3 Bxa6 7. Nf3 d6 8. e4 Bxf1 9. Kxf1 Bg7 10. g3 O-O 11. Kg2
Black's kingside bishop takes the long diagonal.
An account opens every move's note in this family, the plan behind each line, and a trainer that plays the line back at you. It is free.