6 x 1. The Scandinavian (11.17 avg depth)
45 x 2. The Icelandic Gambit (10.47 avg depth)
33 x 3. Portuguese Variation: Quiet Line (4.Be2) (14.67 avg depth)
58 x 4. Portuguese Variation: Classical System (4.Nf3) (14.16 avg depth)
53 x 5. Portuguese Variation: Critical Line (4.f3) (15.81 avg depth)
19 x 6. The Modern Variation (18.05 avg depth)
33 x 7. Odds and Ends (11.27 avg depth)
83 x 8. The Albin Countergambit (12.87 avg depth)
68 x 9. The Stonewall: an unbreachable fortress (16.25 avg depth)
31 x 10. The English and the Réti (12.00 avg depth)
68 x 11. The irregular openings (9.93 avg depth)
