Закон Ома (Ohm’s law)

Tigran Alexandrovich Gharamian – Mariya Olehivna Muzychuk
4th Trophée Anatoly Karpov; Cap d’Agde, October 23, 2015
Sicilian Defence B45

1. e4 c5 2. Nf3 e6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 Nc6 6. Nxc6 bxc6 7. e5 Nd5 8. Ne4 Qa5+ 9. c3 Qc7 10. f4 Qb6 11. Bd3 Be7 12. Qe2 f5. The two sisters must separate: 12. ... Rb8 13. a3 a5 14. c4 f5 15. exf6 Nxf6 16. Rb1 Nxe4 17. Bxe4 Qd4 18. b3 d5 19. Bd3 Bf6 20. Be3 Qc3+ 21. Bd2 Qd4 22. cxd5 Qxd5 23. 0-0 Rxb3 24. Rxb3 Qxb3 25. f5 Qxa3 26. fxe6 Qc5+ 27. Kh1 Qe5 28. Be4 Bxe6 29. Bxc6+ Ke7 30. Qa6 Rd8 31. Bxa5 Rc8 32. Re1 Qxa5 33. Qxa5 Rxc6 34. Qa7+ Kf8 35. h3 Bc8 36. Qa8 Rc7 37. Qd5 Bb7 38. Qd6+ 1 : 0 余泱漪 (Yú Yāngyī) – A. O. Muzychuk, 76th Tata Steel Challengers Tournament, Wijk aan Zee 2014. 13. exf6 Nxf6 14. Be3 Qc7 15. Nxf6+ Bxf6 16. 0-0-0 Qa5 17. a3 Rb8 18. Qc2 Ba6 19. Rhe1 Bb5 20. Bxb5 Rxb5 21. Bd4 Qc7 22. c4 Rb7 23. g3 Bxd4 24. Rxd4 c5 25. Rd3 0-0 26. Red1

26. ... Rfb8!? Muzychuk bravely decides to give Queen and Pawn for two Rooks. Maybe she was afraid she could not withstand the consequences of 26. ... Rf7 27. Rd6 when White would have exerted sustained pressure on her position. 27. Rxd7 Qxd7 28. Rxd7 Rxd7 29. Qe4 Rb6 30. Qe5 Rc6 31. f5 Re7 32. f6 gxf6 33. Qxf6 Rd7 34. Kc2 a6 35. Kc3 Rb7 36. b4 cxb4+ 37. axb4 Rbc7 38. Kb3 Rd7 39. c5 Rf7 40. Qg5+ Kf8 41. Qd8+ Kg7 42. Qg5+ Kf8 43. Qd8+ Kg7 44. Qe8 Rfc7 45. Ka4 Kf6 46. g4 Kg5 47. h3 Kf4 48. Qh5 e5 49. g5 e4 50. Qg4+ Ke3 51. Qg3+ Kd2 52. Qf2+ Kd3 53. Qf1+ Kd2 54. Qf2+ Kd3 55. Kb3 e3 56. Qc2+ Kd4 57. Qc4+ Ke5 58. Kc3 a5 59. Qd4+? Here Gharamian misses a very elegant win: 59. Kd3! (threat: Qc4-e4 mate) 59. ... Kf5 60. h4 (again threatening Qc4-e4 mate) 60. ... Kg6 61. Qe4+ Kh5 62. g6! hxg6 63. Qf4 finis. 59. ... Kf5 60. Qxe3 axb4+ 61. Kxb4 Rxc5 62. Qxc5+ Rxc5 63. Kxc5 Kxg5 64. Kd4 Kh4 65. Ke3 Kxh3 66. Kf4 ½ : ½. Well, Muzychuk secured a prestigious – if not easy! – draw.

Tigran Alexandrovich Gharamian vs. Mariya Olehivna Muzychuk. Photo: Europe Échecs.