Chess openings starting with O
22 named lines, from Old Indian Defense to Owen Defense. Back to the list of chess openings A–Z.
- A41 Old Indian Defense 2 moves
- A53 Old Indian Defense 2 moves
- A53 Old Indian Defense: Aged Gibbon Gambit 3 moves
- A53 Old Indian Defense: Czech Variation, with Nc3 3 moves
- A53 Old Indian Defense: Czech Variation, with Nf3 3 moves
- A54 Old Indian Defense: Duz-Khotimirsky Variation 5 moves
- A53 Old Indian Defense: Janowski Variation 3 moves
- A53 Old Indian Defense: Janowski Variation, Fianchetto Variation 4 moves
- A53 Old Indian Defense: Janowski Variation, Grinberg Gambit 4 moves
- A53 Old Indian Defense: Janowski Variation, Main Line 4 moves
- A55 Old Indian Defense: Normal Variation 5 moves
- A54 Old Indian Defense: Tartakower-Indian 3 moves
- A54 Old Indian Defense: Two Knights Variation 4 moves
- A54 Old Indian Defense: Ukrainian Variation 3 moves
- B00 Owen Defense 1 move
- B00 Owen Defense: Guatemala Defense 2 moves
- B00 Owen Defense: Hekili-Loa Gambit 3 moves
- B00 Owen Defense: Matovinsky Gambit 5 moves
- B00 Owen Defense: Naselwaus Gambit 3 moves
- B00 Owen Defense: Smith Gambit 3 moves
- B00 Owen Defense: Unicorn Variation 3 moves
- B00 Owen Defense: Wind Gambit 3 moves