Chess Opening Theory/1. e4/1...c6/2. d4/2...d5/3. Nc3/3...dxe4/4. Nxe4/4...Qd5

= Caro-Kann Defence =

4...Qd5
The dramatic, and probably unsound, 4...Qd5 was played by Thomas Johansson against Nora Medvegy in the EU Championship and Cork Chess Congress in 2005. White was unable to take advantage, and the game continued as follows:

'''1. e4 c6 2. d4 d5 3. Nc3 dxe4 4. Nxe4 Qd5 5. Nc3 Qd6 6. Bc4 Nf6 7. Nge2 Bf5 8. Bf4 Qd8 9. d5 Nxd5 10. Nxd5 cxd5 11. Qxd5 Qxd5 12. Bxd5 Nc6 13. O-O-O f6 14. Nd4 Nxd4 15. Rxd4 e5 16. Bxb7 Rb8 17. Bc6+ Kf7 18. Bd5+ Kg6 19. g4 exf4 20. gxf5+ Kxf5 21. Re1 g5 22. Bf7 Rb5 23. Bd5 Bc5 24. Be6+ Kg6 25. Rd2 Rhb8 26. c3 Bb6 27. Bd7 Re5 28. Rxe5 fxe5 29. Rd6+ Kf7 30. f3 Ke7 31. Rd1 h5 32. Bf5 Kf6 33. Be4 g4 34. Rd6+ Ke7 35. Rh6 Rg8 36. Rh7+ Kf6 37. fxg4 hxg4 38. Rh6+ Kg5 39. Re6 f3 40. Rxe5+ Kf4 41. Re7 Rh8 42. Bh7 Bg1 43. Rf7+ Kg5 44. Be4 Rh3 45. Rf5+ Kh4 46. c4 Bxh2 47. c5 Kg3 48. c6 Kf2 49. Kd2 Rh8 50. Kd3 Rd8+ 51. Bd5 Bc7 52. Kc4 Ke2 53. Rf7 Rxd5 54. Kxd5 f2 55. Rxc7 f1=Q 56. Re7+ Kd3 57. c7 Qf5+ 58. Kc6 Qc8 59. Rd7+ Kc4 60. b3+ Kb4 61. Rd4+ Kc3 62. Rd8 Qa6+ 63. Kd7 Qb5+ 64. Kd6 Qb6+ 1/2-1/2'''