Master the Cambridge Springs Defense - Part 2, Yugoslav Variation
47The first recorded use of the Cambridge Springs was by Emanuel Lasker in 1892. The name derives from a 1904 tournament in Cambridge Springs, Pennsylvania, in which the defense was used several times. Practitioners of the opening have included Efim Bogoljubov, Vasily Smyslov, Garry Kasparov, and Magnus Carlsen.
The line remains popular among amateurs because there are several traps White must avoid. For example, 7.Nd2 Bb4 8.Qc2 0-0 9.Bd3?? dxc4! (threatening ...Qxg5) 10.Bxf6 cxd3! (a zwischenzug) 11.Qxd3 Nxf6 and Black has won a piece.
White has several choices on his seventh move. The most common are:
7.Nd2 (the main line) immediately breaks the pin on the c3 knight and defends e4; 7...Bb4 is answered by 8.Qc2, defending the c3 knight and covering e4.
7.cxd5 avoids complications by clarifying the situation in the center. Black's strongest is the recapture 7...Nxd5, continuing the attack on c3.
7.Bxf6 avoids tactics involving discovered attacks on the g5-bishop.
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PGN FILES OF THE GAMES IN THE VIDEO:
1. c4 c6 2. d4 d5 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 Nbd7 6. e3 Qa5 7. cxd5 Nxd5 8. Qd2 Bb4 9. Rc1 b6 10. Bd3 Ba6 11. O-O O-O 12. e4 Nxc3 13. bxc3 Ba3 14. Rce1 c5 15. Bxa6 Qxa6 16. e5 cxd4 17. Qxd4 Qb7 18. Qa4?! { (0.44 → -0.60) Inaccuracy. Rd1 was best. } (18. Rd1 Nc5 19. Nd2 Rfc8 20. Nc4 Ne4 21. Nxa3 Nxg5 22. Nc4 Ne4 23. Rfe1 b5 24. Qxe4 Qxe4) 18... Bc5 19. Rd1 b5 20. Qg4 Rfc8 21. Bf6 Bf8 22. Ng5?! { (-0.62 → -1.32) Inaccuracy. Rd3 was best. } (22. Rd3 Rc4 23. Nd4 Nxf6 24. exf6 e5 25. fxg7 Bxg7 26. Rg3 f5 27. Qf3 Qxf3 28. Nxf3 Rxc3) 22... Rc4 23. Rd4? { (-1.30 → -3.20) Mistake. Qh5 was best. } (23. Qh5 Nxf6 24. exf6 h6 25. fxg7 Bxg7 26. Nf3 Rxc3 27. Ne5 Rc5 28. f4 Rac8 29. Qe2 Rc2) 23... Rxd4 24. cxd4 gxf6 25. Ne4+ Kh8 26. exf6 h6 27. h3 Qd5 28. Rc1?! { (-3.82 → -4.80) Inaccuracy. Nc3 was best. } (28. Nc3 Nxf6 29. Nxd5 Nxg4 30. Nc7 Rc8 31. Nxb5 a6 32. Na7 Rc7 33. hxg4 Rxa7 34. d5 exd5) 28... b4 29. Rc7 Qxd4 30. g3 Nxf6 31. Qf3?! { (-5.60 → -7.60) Inaccuracy. Nxf6 was best. } (31. Nxf6 Qxf6 32. Qh5 Kg8 33. Qg4+ Qg6 34. Qxg6+ fxg6 35. Rc6 Kf7 36. Ra6 Kf6 37. Kf1 Rc8) 31... Nxe4 { White resigns. } 0-1
1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c6 5. Bg5 Nbd7 6. e3 Qa5 7. cxd5 Nxd5 8. Qd2 Bb4 9. Rc1 h6 10. Bh4 b6 11. Bd3 Ba6 12. O-O O-O 13. e4 Nxc3 14. bxc3 Ba3 15. Rcd1 Rfe8 16. Rfe1 Bxd3 17. Qxd3 Rac8 18. h3 b5 19. Re2?! { (0.39 → -0.21) Inaccuracy. e5 was best. } (19. e5 Nf8 20. Re4 Ng6 21. Rg4 Bf8 22. Bf6 Qxa2 23. Nh4 Nxh4 24. Bxh4 Qb3 25. Rb1 Qc4) 19... Qa4 20. Rde1?! { (-0.10 → -1.13) Inaccuracy. Red2 was best. } (20. Red2 Bd6) 20... Bf8 21. g4 c5 22. d5?! { (-0.98 → -1.83) Inaccuracy. e5 was best. } (22. e5 cxd4 23. Nxd4 g5 24. Bg3 Nc5 25. Qxb5 a6 26. Qxa4 Nxa4 27. Rc2 Nxc3 28. Ne2 Nd5) 22... c4 23. Qd2 b4 24. dxe6 Rxe6 25. Nd4?! { (-2.09 → -2.91) Inaccuracy. cxb4 was best. } (25. cxb4 Bxb4) 25... Rb6 26. Qd1?! { (-3.08 → -4.27) Inaccuracy. e5 was best. } (26. e5 bxc3 27. Qe3 Nc5 28. Qxc3 Nd3 29. Rf1 Qd7 30. Nf5 g6 31. Nd6 Bxd6 32. exd6 Rxd6) 26... Qxd1 27. Rxd1 bxc3 28. Rc2 Nc5 29. Rxc3?! { (-3.46 → -5.35) Inaccuracy. f3 was best. } (29. f3 Rb2 30. Rxc3 Na4 31. Rcc1 c3 32. Nc2 Rxa2 33. Kf1 Bc5 34. Bg3 a5 35. h4 Bb4) 29... Nxe4?! { (-5.35 → -3.42) Inaccuracy. g5 was best. } (29... g5) 30. Re3 Nf6?! { (-3.64 → -2.43) Inaccuracy. Nc5 was best. } (30... Nc5 31. Bg3 Rb2 32. Rde1 Rd2 33. Nf3 Rd3 34. Be5 Rxe3 35. Rxe3 Nd3 36. Bc3 Nf4 37. Nd4) 31. Ne2 Bc5 32. Re5 Rb2 33. Nc3?! { (-3.14 → -4.15) Inaccuracy. Kf1 was best. } (33. Kf1) 33... Bb4 34. Rc1 Nd7?! { (-4.78 → -3.09) Inaccuracy. g5 was best. } (34... g5) 35. Re4 Nb6 36. a4?! { (-3.67 → -4.89) Inaccuracy. Rd4 was best. } (36. Rd4 f6) 36... Rb3 37. Na2?! { (-4.38 → -6.69) Inaccuracy. Nb5 was best. } (37. Nb5 a5 38. Na7 Ra8 39. Nc6 f6 40. Bg3 Bd2 41. Rf1 c3 42. Rd4 Rb2 43. Bc7 Kh7) 37... Bd2 38. Rc2 c3 39. Rd4 Rb2 0-1
1. d4 d5 2. c4 c6 3. Nc3 Nf6 4. Nf3 e6 5. Bg5 Nbd7 6. e3 Qa5 7. cxd5 Nxd5 8. Qb3 Bb4 9. Rc1 e5 10. Bc4 e4 11. Nd2 N7b6 12. Bxd5 cxd5 13. O-O O-O 14. a3 Bxc3 15. Qxc3 Qxc3 16. Rxc3 Bg4 17. Bf4 Rfc8 18. Rc5 Be6 19. Rb1 Kf8 20. Be5 Na4 21. Ra5 Nb6 22. Rc5 Nd7 23. Rcc1 g5 24. Nb3 Ke7 25. Bg3 b6 26. a4 Nf6 27. Rxc8 Rxc8 28. Rc1 Kd7 29. Rxc8 Kxc8 30. a5 Ne8 31. axb6 axb6 32. Nc1 Kb7 33. Na2 Ka6 34. h3 Kb5 35. b3 f6 36. Kf1 Kc6 37. Bb8 h5 38. Nb4+ Kb7 39. Bg3 h4 40. Bh2 Ng7 41. Ke1 Nf5 42. Na2 Kc6 43. Nb4+ Kd7 44. Kd2 Ne7 45. Na6 Bf7 46. Bc7 Nc8 47. Bh2 Nd6 48. Nb4 Nf5 49. Nc2 Ne7 50. Nb4 Nf5 51. Na2 Kc6 52. Nb4+ Kb5 53. Na2 Kc6 54. Nc3 Be6 55. b4 b5 56. Bb8 Kb7 57. Bh2 Kc6 58. Bb8 Bd7 59. Ba7 Kb7 60. Bc5 Bc6 61. Ke1 Kc7 62. Kf1 Kc8 63. Ke2 Kd7 64. Ke1 Ke6 65. Na2 Ng7 1/2-1/2