This opening should not be played. Ever. It’s called the Marshall Defense and it gives away the center on move two. White ends up being better with no positional compensation for black. I played a weird move I like because it prevents black’s main ideas and most of the counterplay.
1. d4 Nf6 2. c4 d5 { D06 Queen’s Gambit Declined: Marshall Defense } 3. cxd5 Nxd5 4. e4 Nf6 5. Nc3 e6 6. a3 c5 7. Nf3 cxd4 8. Nxd4 Bc5 9. Bb5+ Nfd7 10. O-O O-O 11. b4 Bb6 12. Bb2 Ne5 13. Nce2 a6 14. Ba4 Bc7 15. Rc1 b5 16. Bb3 Re8 17. Qc2 Bd6 18. Qc3 Ra7 19. f4 Rc7 20. Qg3 Ng6 21. Rcd1 Rd7 22. Qc3 Bf8 23. f5 exf5 24. Nxf5 Rxd1 25. Nh6+ gxh6 26. Bxf7# { White wins by checkmate. } 1-0
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