42 x Introduction & Quickstarter Guide (13.57 avg depth)
27 x 1. Austrian Attack 4.f4: Intro and Sidelines (10.78 avg depth)
22 x 2. Austrian Attack: 4.f4 Bg7 5.Nf3 O-O 6.Be3 (13.45 avg depth)
19 x 3. Austrian Attack: 4.f4 Bg7 5.Nf3 O-O 6.e5 (13.16 avg depth)
16 x 4. Austrian Attack: 6.Bd3 Nc6 7.O-O (14.00 avg depth)
15 x 5. Austrian Attack: 6.Bd3 Nc6 7.e5 (14.60 avg depth)
16 x 6. Austrian Attack: 6.Bd3 Nc6 - Other Tries on Move 7 (12.19 avg depth)
21 x 7. Classical 4.Nf3 Bg7 5.Be2 - Intro and Sidelines (12.81 avg depth)
15 x 8. Classical 4.Nf3 Bg7 5.Be2 - Mainlines with ...e5 (13.80 avg depth)
16 x 9. The flexible 4.Be3 - Intro and Sidelines (11.44 avg depth)
23 x 10. The flexible 4.Be3 with f3/Qd2 (13.30 avg depth)
22 x 11. The flexible 4.Be3 with Nf3 (12.41 avg depth)
14 x 12. The London Pirc - Bf4 setups (10.79 avg depth)
19 x 13. The aggressive 4.Bg5 - Intro and Sidelines (10.47 avg depth)
15 x 14. The aggressive 4.Bg5 - The Mainline 5.Qd2 (11.53 avg depth)
26 x 15. The Italian Pirc - Bc4 setups (11.42 avg depth)
10 x 16. The solid Fianchetto - 4.g3 (11.50 avg depth)
23 x 17. Other fourth moves 4.Be2, 4.h3, 4.Bd3 etc. (8.91 avg depth)
23 x 18. Sämisch style 3.f3 (12.48 avg depth)
24 x 19. 3.Bd3 and other third move sidelines (11.08 avg depth)
18 x 20. White avoids 2.d4 (9.56 avg depth)
