The free lines of this chapter, each one trainable move by move.
Main Line: position after 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 d6 6. O-O Bg4 7. h3 Bh5 8. Nbd2 O-O 9. b4 Bb6 10. a4 ♜︎ ♛︎ ♜︎ ♚︎ ♟︎ ♟︎ ♟︎ ♟︎ ♟︎ ♟︎ ♝︎ ♞︎ ♟︎ ♞︎ ♟︎ ♝︎ ♟︎ ♟︎ ♝︎ ♟︎ ♟︎ ♟︎ ♞︎ ♟︎ ♞︎ ♟︎ ♟︎ ♜︎ ♝︎ ♛︎ ♜︎ ♚︎
Main Line
… 7... Bh5 8. Nbd2 O-O 9. b4 Bb6 10. a4
Trap: 9...Nxd5, you win a piece: position after 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 d6 5. d4 exd4 6. cxd4 Bb4+ 7. Nc3 Bg4 8. O-O Nf6 9. Nd5 Nxd5 10. exd5 Ne7 11. Qa4+ Qd7 12. Qxb4 Bxf3 13. gxf3 O-O 14. Qb3 ♜︎ ♜︎ ♚︎ ♟︎ ♟︎ ♟︎ ♛︎ ♞︎ ♟︎ ♟︎ ♟︎ ♟︎ ♟︎ ♝︎ ♟︎ ♛︎ ♟︎ ♟︎ ♟︎ ♟︎ ♟︎ ♜︎ ♝︎ ♜︎ ♚︎
Trap: 9...Nxd5, you win a piece
… 4. c3 d6 5. d4 exd4 6. cxd4 Bb4+ 7. Nc3 Bg4 8. O-O Nf6 9. Nd5 Nxd5 10. exd5 Ne7 11. Qa4+ Qd7 12. Qxb4 Bxf3 13. gxf3 O-O 14. Qb3
4...d6: position after 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 d6 5. d4 exd4 6. cxd4 Bb6 7. h3 Nf6 8. O-O h6 9. Nc3 ♜︎ ♝︎ ♛︎ ♚︎ ♜︎ ♟︎ ♟︎ ♟︎ ♟︎ ♟︎ ♝︎ ♞︎ ♟︎ ♞︎ ♟︎ ♝︎ ♟︎ ♟︎ ♞︎ ♞︎ ♟︎ ♟︎ ♟︎ ♟︎ ♟︎ ♜︎ ♝︎ ♛︎ ♜︎ ♚︎
4...d6
… 4. c3 d6 5. d4 exd4 6. cxd4 Bb6 7. h3 Nf6 8. O-O h6 9. Nc3
4...d6: position after 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 d6 5. d4 exd4 6. cxd4 Bb6 7. h3 Nf6 8. O-O O-O 9. Re1 ♜︎ ♝︎ ♛︎ ♜︎ ♚︎ ♟︎ ♟︎ ♟︎ ♟︎ ♟︎ ♟︎ ♝︎ ♞︎ ♟︎ ♞︎ ♝︎ ♟︎ ♟︎ ♞︎ ♟︎ ♟︎ ♟︎ ♟︎ ♟︎ ♜︎ ♞︎ ♝︎ ♛︎ ♜︎ ♚︎
4...d6
… 4. c3 d6 5. d4 exd4 6. cxd4 Bb6 7. h3 Nf6 8. O-O O-O 9. Re1
4...d6: position after 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 d6 5. d4 exd4 6. cxd4 Bb6 7. h3 Nge7 8. O-O ♜︎ ♝︎ ♛︎ ♚︎ ♜︎ ♟︎ ♟︎ ♟︎ ♞︎ ♟︎ ♟︎ ♟︎ ♝︎ ♞︎ ♟︎ ♝︎ ♟︎ ♟︎ ♞︎ ♟︎ ♟︎ ♟︎ ♟︎ ♟︎ ♜︎ ♞︎ ♝︎ ♛︎ ♜︎ ♚︎
4...d6
… 4. c3 d6 5. d4 exd4 6. cxd4 Bb6 7. h3 Nge7 8. O-O
4...d6: position after 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 d6 5. d4 exd4 6. cxd4 Bb6 7. h3 h6 8. Nc3 Nf6 9. O-O ♜︎ ♝︎ ♛︎ ♚︎ ♜︎ ♟︎ ♟︎ ♟︎ ♟︎ ♟︎ ♝︎ ♞︎ ♟︎ ♞︎ ♟︎ ♝︎ ♟︎ ♟︎ ♞︎ ♞︎ ♟︎ ♟︎ ♟︎ ♟︎ ♟︎ ♜︎ ♝︎ ♛︎ ♜︎ ♚︎
4...d6
… 4. c3 d6 5. d4 exd4 6. cxd4 Bb6 7. h3 h6 8. Nc3 Nf6 9. O-O
4...d6: position after 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 d6 5. d4 exd4 6. cxd4 Bb6 7. h3 h6 8. Nc3 Nge7 9. a3 ♜︎ ♝︎ ♛︎ ♚︎ ♜︎ ♟︎ ♟︎ ♟︎ ♞︎ ♟︎ ♟︎ ♝︎ ♞︎ ♟︎ ♟︎ ♝︎ ♟︎ ♟︎ ♟︎ ♞︎ ♞︎ ♟︎ ♟︎ ♟︎ ♟︎ ♜︎ ♝︎ ♛︎ ♚︎ ♜︎
4...d6
… 4. c3 d6 5. d4 exd4 6. cxd4 Bb6 7. h3 h6 8. Nc3 Nge7 9. a3
5...O-O: position after 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 O-O 6. O-O h6 7. Nbd2 ♜︎ ♝︎ ♛︎ ♜︎ ♚︎ ♟︎ ♟︎ ♟︎ ♟︎ ♟︎ ♟︎ ♞︎ ♞︎ ♟︎ ♝︎ ♟︎ ♝︎ ♟︎ ♟︎ ♟︎ ♞︎ ♟︎ ♟︎ ♞︎ ♟︎ ♟︎ ♟︎ ♜︎ ♝︎ ♛︎ ♜︎ ♚︎
5...O-O
… 5. d3 O-O 6. O-O h6 7. Nbd2
5...O-O: position after 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 O-O 6. O-O d5 7. exd5 Nxd5 8. Re1 Bg4 9. Nbd2 Nf4 10. Ne4 Bd6 11. h3 Bh5 12. Bxf4 exf4 13. d4 ♜︎ ♛︎ ♜︎ ♚︎ ♟︎ ♟︎ ♟︎ ♟︎ ♟︎ ♟︎ ♞︎ ♝︎ ♝︎ ♝︎ ♟︎ ♞︎ ♟︎ ♟︎ ♞︎ ♟︎ ♟︎ ♟︎ ♟︎ ♟︎ ♜︎ ♛︎ ♜︎ ♚︎
5...O-O
… 5. d3 O-O 6. O-O d5 7. exd5 Nxd5 8. Re1 Bg4 9. Nbd2 Nf4 10. Ne4 Bd6 11. h3 Bh5 12. Bxf4 exf4 13. d4
5...O-O: position after 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 O-O 6. O-O d6 7. Re1 h6 8. h3 a6 9. Bb3 Ba7 10. Nbd2 ♜︎ ♝︎ ♛︎ ♜︎ ♚︎ ♝︎ ♟︎ ♟︎ ♟︎ ♟︎ ♟︎ ♞︎ ♟︎ ♞︎ ♟︎ ♟︎ ♟︎ ♝︎ ♟︎ ♟︎ ♞︎ ♟︎ ♟︎ ♟︎ ♞︎ ♟︎ ♟︎ ♜︎ ♝︎ ♛︎ ♜︎ ♚︎
5...O-O
… 5. d3 O-O 6. O-O d6 7. Re1 h6 8. h3 a6 9. Bb3 Ba7 10. Nbd2
5...O-O: position after 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 O-O 6. O-O d6 7. Re1 Bg4 8. h3 Be6 9. Bxe6 fxe6 10. b4 Bb6 11. a4 ♜︎ ♛︎ ♜︎ ♚︎ ♟︎ ♟︎ ♟︎ ♟︎ ♟︎ ♝︎ ♞︎ ♟︎ ♟︎ ♞︎ ♟︎ ♟︎ ♟︎ ♟︎ ♟︎ ♟︎ ♞︎ ♟︎ ♟︎ ♟︎ ♜︎ ♞︎ ♝︎ ♛︎ ♜︎ ♚︎
5...O-O
… 5. d3 O-O 6. O-O d6 7. Re1 Bg4 8. h3 Be6 9. Bxe6 fxe6 10. b4 Bb6 11. a4
5...h6: position after 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 h6 6. O-O O-O 7. Nbd2 ♜︎ ♝︎ ♛︎ ♜︎ ♚︎ ♟︎ ♟︎ ♟︎ ♟︎ ♟︎ ♟︎ ♞︎ ♞︎ ♟︎ ♝︎ ♟︎ ♝︎ ♟︎ ♟︎ ♟︎ ♞︎ ♟︎ ♟︎ ♞︎ ♟︎ ♟︎ ♟︎ ♜︎ ♝︎ ♛︎ ♜︎ ♚︎
5...h6
… 5. d3 h6 6. O-O O-O 7. Nbd2
5...h6: position after 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 h6 6. O-O d6 7. Re1 Bg4 8. h3 Bh5 9. b4 Bb6 10. Nbd2 O-O 11. a4 ♜︎ ♛︎ ♜︎ ♚︎ ♟︎ ♟︎ ♟︎ ♟︎ ♟︎ ♝︎ ♞︎ ♟︎ ♞︎ ♟︎ ♟︎ ♝︎ ♟︎ ♟︎ ♝︎ ♟︎ ♟︎ ♟︎ ♞︎ ♟︎ ♞︎ ♟︎ ♟︎ ♜︎ ♝︎ ♛︎ ♜︎ ♚︎
5...h6
… 5. d3 h6 6. O-O d6 7. Re1 Bg4 8. h3 Bh5 9. b4 Bb6 10. Nbd2 O-O 11. a4
5...h6: position after 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 h6 6. O-O d6 7. Re1 O-O 8. h3 a6 9. Bb3 Ba7 10. Nbd2 ♜︎ ♝︎ ♛︎ ♜︎ ♚︎ ♝︎ ♟︎ ♟︎ ♟︎ ♟︎ ♟︎ ♞︎ ♟︎ ♞︎ ♟︎ ♟︎ ♟︎ ♝︎ ♟︎ ♟︎ ♞︎ ♟︎ ♟︎ ♟︎ ♞︎ ♟︎ ♟︎ ♜︎ ♝︎ ♛︎ ♜︎ ♚︎
5...h6
… 5. d3 h6 6. O-O d6 7. Re1 O-O 8. h3 a6 9. Bb3 Ba7 10. Nbd2
6...h6: position after 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 d6 6. O-O h6 7. Re1 Bg4 8. h3 Bh5 9. b4 Bb6 10. Nbd2 O-O 11. a4 ♜︎ ♛︎ ♜︎ ♚︎ ♟︎ ♟︎ ♟︎ ♟︎ ♟︎ ♝︎ ♞︎ ♟︎ ♞︎ ♟︎ ♟︎ ♝︎ ♟︎ ♟︎ ♝︎ ♟︎ ♟︎ ♟︎ ♞︎ ♟︎ ♞︎ ♟︎ ♟︎ ♜︎ ♝︎ ♛︎ ♜︎ ♚︎
6...h6
… 6. O-O h6 7. Re1 Bg4 8. h3 Bh5 9. b4 Bb6 10. Nbd2 O-O 11. a4
6...O-O: position after 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 d6 6. O-O O-O 7. Re1 h6 8. h3 a6 9. Bb3 Ba7 10. Nbd2 ♜︎ ♝︎ ♛︎ ♜︎ ♚︎ ♝︎ ♟︎ ♟︎ ♟︎ ♟︎ ♟︎ ♞︎ ♟︎ ♞︎ ♟︎ ♟︎ ♟︎ ♝︎ ♟︎ ♟︎ ♞︎ ♟︎ ♟︎ ♟︎ ♞︎ ♟︎ ♟︎ ♜︎ ♝︎ ♛︎ ♜︎ ♚︎
6...O-O
… 6. O-O O-O 7. Re1 h6 8. h3 a6 9. Bb3 Ba7 10. Nbd2
8...Qd7: position after 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 d6 6. O-O Bg4 7. h3 Bh5 8. Nbd2 Qd7 9. Re1 ♜︎ ♚︎ ♜︎ ♟︎ ♟︎ ♟︎ ♛︎ ♟︎ ♟︎ ♟︎ ♞︎ ♟︎ ♞︎ ♝︎ ♟︎ ♝︎ ♝︎ ♟︎ ♟︎ ♟︎ ♞︎ ♟︎ ♟︎ ♟︎ ♞︎ ♟︎ ♟︎ ♜︎ ♝︎ ♛︎ ♜︎ ♚︎
8...Qd7
… 8. Nbd2 Qd7 9. Re1
8...h6: position after 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. c3 Nf6 5. d3 d6 6. O-O Bg4 7. h3 Bh5 8. Nbd2 h6 9. Re1 ♜︎ ♛︎ ♚︎ ♜︎ ♟︎ ♟︎ ♟︎ ♟︎ ♟︎ ♞︎ ♟︎ ♞︎ ♟︎ ♝︎ ♟︎ ♝︎ ♝︎ ♟︎ ♟︎ ♟︎ ♞︎ ♟︎ ♟︎ ♟︎ ♞︎ ♟︎ ♟︎ ♜︎ ♝︎ ♛︎ ♜︎ ♚︎
8...h6
… 8. Nbd2 h6 9. Re1