ECO D41

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

4 named opening lines are classified under ECO code D41.

• Queen's Gambit Declined: Semi-Tarrasch Defense, Endgame Variation — 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 c5 5.cxd5 cxd4 6.Qxd4 exd5 7.e4 dxe4 8.Qxd8+
• Queen's Gambit Declined: Semi-Tarrasch Defense, Exchange Variation — 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 c5 5.cxd5 Nxd5 6.e4
• Queen's Gambit Declined: Semi-Tarrasch Defense, Kmoch Variation — 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c5 5.cxd5 Nxd5 6.e4 Nxc3 7.bxc3 cxd4 8.cxd4 Bb4+ 9.Bd2 Bxd2+ 10.Qxd2 O-O 11.Bb5
• Queen's Gambit Declined: Semi-Tarrasch Defense, San Sebastian Variation — 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 c5 7.Nf3 cxd4 8.cxd4 Bb4+ 9.Bd2 Qa5