Queen's Gambit Declined Three Knights Variation (1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3) Chess Puzzles

The Queen's Gambit Declined Three Knights Variation is a chess opening that arises after 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3. It is a solid defense for Black, aiming to maintain pawn structure and control the center while developing pieces harmoniously.