ECO family guide
Owen Defense — all variations and ECO codes
8 named lines across 1 ECO code (B00). Source: the CC0-licensed lichess.org opening database.
The main line
How the main line scores at your rating
Real Lichess win rates for 1.e4 b6, playing as black — the family's other variations are not separately tracked for win rate yet, main line only.
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| Rating band | Games | White / draw / Black | Score for black |
|---|---|---|---|
| 1400-1600 | 12,254,259 | 49.6% / 3.7% / 46.7% | 48.6% |
| 1600-1800 | 13,930,772 | 50.3% / 3.9% / 45.8% | 47.8% |
| 1800-2000 | 9,515,772 | 50.8% / 4.2% / 44.9% | 47.1% |
| 2000+ | 3,854,545 | 51.4% / 4.9% / 43.7% | 46.2% |
All 8 named variations
Every named line in the Owen Defense family, from the CC0-licensed ECO classification — not separately tracked for win rate, but every ECO code and move sequence is real, sourced data.
- B00Owen Defense (main line) — 1.e4 b6
- B00Guatemala Defense — 1.e4 b6 2.d4 Ba6
- B00Hekili-Loa Gambit — 1.e4 b6 2.d4 c5 3.dxc5 Nc6
- B00Matovinsky Gambit — 1.e4 b6 2.d4 Bb7 3.Bd3 f5 4.exf5 Bxg2 5.Qh5+ g6
- B00Naselwaus Gambit — 1.e4 b6 2.d4 Bb7 3.Bg5
- B00Smith Gambit — 1.e4 b6 2.d4 Bb7 3.Nf3
- B00Unicorn Variation — 1.e4 f6 2.d4 b6 3.c4 Bb7
- B00Wind Gambit — 1.e4 b6 2.d4 Bb7 3.f3 e5
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ECO Volume B: Semi-Open Games (other than the French Defense) → · All ECO families → · Search and play every line in the interactive explorer →
Related
Alekhine Defense
56 named lines, ECO B02
Caro-Kann Defense
110 named lines, ECO B10
King's Pawn Game
38 named lines, ECO B00