Queen's Gambit
chess opening
Baltic Defense
chess opening 1. d4 d5 2. c4 Bf5
Marshall Defense
chess opening 1. d4 d5 2. c4 Nf6
Slav Defense
chess opening 1. d4 d5 2. c4 c6; one of the primary defenses to the Queen's Gambit
Keres Defence
chess opening which consists of the moves 1. d4 e6 2. c4 Bb4+
Queen's Gambit Declined
chess opening (1. d4 d5 2. c4 e6)
Queen's Gambit, Symmetrical Defense
chess opening
Queen's Gambit Accepted
chess opening