ECO D52

ECO D00–D99 — Closed and Semi-Closed Games: 1.d4 d5 queen's pawn openings and the Grünfeld Defense.

6 named opening lines are classified under ECO code D52.

• Queen's Gambit Declined: Cambridge Springs Defense — 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 e6 5.Bg5 Nbd7 6.e3 Qa5
• Queen's Gambit Declined: Cambridge Springs Defense, Argentine Variation — 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7 5.e3 c6 6.Nf3 Qa5 7.Nd2 Bb4 8.Qc2 O-O 9.Bh4
• Queen's Gambit Declined: Cambridge Springs Defense, Bogoljubow Variation — 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 e6 5.Bg5 Nbd7 6.e3 Qa5 7.Nd2 Bb4 8.Qc2
• Queen's Gambit Declined: Cambridge Springs Defense, Capablanca Variation — 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7 5.e3 c6 6.Nf3 Qa5 7.Bxf6
• Queen's Gambit Declined: Cambridge Springs Defense, Rubinstein Variation — 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 e6 5.Bg5 Nbd7 6.e3 Qa5 7.Nd2 dxc4
• Queen's Gambit Declined: Cambridge Springs Defense, Yugoslav Variation — 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 e6 5.Bg5 Nbd7 6.e3 Qa5 7.cxd5 Nxd5