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Ian Nepomniachtchi vs Jan-Krzysztof Duda
World Team Chess Championship (2017), Khanty-Mansiysk RUS, rd 6, Jun-23
Sicilian Defense: Najdorf Variation (B90)  ·  1-0



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Kibitzer's Corner
Premium Chessgames Member
  PawnSac: < 28.Rf3! >

excellent move! White threatens to double on the f file, which induces black to trade a pair of rooks, helping white regroup the knight to e3/f5 (closing the mating net). The exchange sac is already in view.

Premium Chessgames Member
  PawnSac: < 31.Rf1?!>

Kh2 looks more efficient. Retreating the rook is a tempo loss. Nevertheless, white still capitalizes on the position as black also falters.

Premium Chessgames Member
  PawnSac: Stockfish evaluates the position after 28.Rf3 as dead equal

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Stockfish 7 x64:

45/85 6:47:08 14,043,074k 575k -0.08

Rxd1+ 29. Nxd1 Rd8 30. Ne3 Qxb2 31. Kh2 Qc1 32. Ng4 Rd6 33. Qh5 Rd1 34. Nxf6+ exf6 35. Rxf6 Rh1+ 36. Kg3 Qe1+ 37. Rf2 Qe3+ 38. Rf3 Qe1+ 39. Kg4 Qxe4+ 40. Kxg5 Qc4 41. Qg4 Qxg4+ 42. hxg4 Rc1 43. Rc3 Rf1 44. Rxc6 e4 45. a3 e3 46. Rc8+ Kg7 47. Re8 f6+ 48. Kh4 Re1 49. Kg3 Kg6 50. Re4 e2 51. Kf2 Ra1 52. Kxe2 Rxa3 53. Kd2 Rg3 54. Rxa4 Rxg2+ 55. Kc3 Kg5 56. Kb3 Rxg4 57. Rxg4+ Kxg4 58. c4 Kf5 59. c5 Ke6 60. Kc4 f5 61. Kd4 Kd7 62. Kd5

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Premium Chessgames Member
  PawnSac: < 31....Qxa2?? >

The losing moment ( Correct is 31...Rd6 = ).

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Stockfish 7 x64:

46/70 4:06:12 15,829,323k 1,072k +63.37

Rf1xf6 Qa2-a3 Qh6xg5+ Kg8-f8 Rf6-h6 Kf8-e8 Ne3-c4 Qa3-c5 Rh6-h8+ Ke8-d7 Nc4xe5+ Kd7-c7 Rh8xd8 f7-f6 Rd8-d7+ Kc7-b6 Qg5-g8 Qc5xe5 Qg8-d8+ Kb6-b5 Rd7-b7+ Kb5-c5 Qd8-b6+ Kc5-d6 Qb6-b4+ Qe5-c5 Rb7-d7+ Kd6xd7 Qb4xc5 Kd7-e6 Qc5xc6+ Ke6-e5 Qc6-d5+ Ke5-f4 Qd5-e6 a4-a3 Qe6xe7 a3-a2 Qe7xf6+ Kf4xe4 Qf6-e6+ Ke4-d4 Qe6xa2 Kd4-c5 Qa2-a5+ Kc5-c4 Qa5-a3 Kc4-d5 Qa3-a6 Kd5-e5 Qa6-c6 Ke5-d4 Qc6-a4+ Kd4-e3 Qa4-c4 Ke3-d2 Qc4-d3+ Kd2-c1 Qd3-b3 Kc1-d2 g2-g4

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