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

“Queens gambit declined three knights” refers to a QGD line where Black develops the queenside knight to f6 and White responds with the “three-knights” style development (commonly involving Nf3 and Nc3) while Black keeps the pawn structure typical of the QGD. The defining feature is the early knight-heavy setup after the QGD acceptance is declined—rather than an immediate cxd5—leading to a flexible central tension. I don’t have a single universally agreed, specific move-order for this exact named sub-variation (many databases label different move orders under the same umbrella), so the most re