Fréttir

Ju Wenjun hélt heimsmeistaratitlinum

Eftir

23. júlí, 2023

919

Ju Wenjun (2564) vann í gær sinn fjórða heimsmeistaratitil kvenna. Hún vann lokaskákina í heimsmeistaraeinvígi sínu við Lei Iingjie (2554) og vann þar með sigur í heimsmeistaraeinvíginu 6½-5½.

   [Event "FIDE Women's Chess World Championship"]  [Site "Chongqing, China"]  [Date "2023.07.21"]  [Round "12"]  [White "Ju, Wenjun"]  [Black "Lei, Tingjie"]  [Result "1-0"]  [ECO "D04"]  [WhiteElo "2564"]  [BlackElo "2554"]  [Annotator "rafael"]  [PlyCount "123"]  [EventDate "2023.??.??"]  [TimeControl "40/5400+30:1800+30"]   1. d4 d5 2. Nf3 Nf6 3. e3 c5 4. dxc5 $5 {[%c_effect  c5;square;c5;type;Interesting;persistent;true] By now we are used to queen's  pawn sidelines in world championship matches. Both Ding and Ju showed that this  is just as viable a path as fighting for advantage in the main lines.} 4... e6  5. b4 a5 6. c3 axb4 7. cxb4 b6 8. Bb5+ Bd7 9. Bxd7+ Nbxd7 10. a4 bxc5 11. b5 {I  have a great friend (and a strong amateur chess player) who has always been a  devoted fan of the Noteboom Variation. He felt invincible with these passed  pawns. I wonder how he feels now that Ju is showing the world that it's possible  to play the line with White, with an extra tempo. I also have a good friend, GM  Gilberto Milos, who loves playing with central pawns: he is probably not very  impressed with White's play.} 11... Qc7 {A rare move that has been played in  correspondence games, but the game will transpose to a more common position  later. Black has various tries here:} (11... Bd6) (11... g5) (11... c4) 12. Bb2  Bd6 13. O-O O-O (13... g5 $5 {[%c_effect  g5;square;g5;type;Interesting;persistent;true] is critical. This is a typical  move in this double-edged variation. Lei thought for a long time before castling  and was maybe considering playing it.} 14. g3 (14. Nxg5 {is also possible:}  14... Bxh2+ 15. Kh1 Be5 16. Nc3 {with a complicated position.}) 14... g4 15. Nh4  Be5 16. Nc3 Rg8 {The computer is happy with Black's position, and this was  played in two correspondence games that ended in a draw. From a human  perspective, the position is difficult to play with either color.}) 14. Nbd2  {The game has transposed to a known position, played in nearly 30 games.} 14...  Rfc8 (14... c4 {is the main move.}) (14... e5 {is a very concrete way to pursue  equality.} 15. e4 $1 {[%c_effect e4;square;e4;type;GreatFind;persistent;true] The  only reasonable move.} 15... c4 16. Qc2 Rfc8 17. Rfc1 Bb4 18. Bc3 Bxc3 19. Qxc3  dxe4 20. Ng5 Nc5 {A possible continuation now is:} 21. Qxc4 Qd7 $1 {[%c_effect  d7;square;d7;type;GreatFind;persistent;true]} 22. Qe2 Qf5 23. Ngxe4 Ncxe4 24.  Rxc8+ Rxc8 25. Nxe4 Nxe4 26. b6 {The pawns are so strong that they compensate  for the missing piece, but no more than that: the game should end in a draw.})  15. Qc2 c4 $2 {[%c_effect c4;square;c4;type;Mistake;persistent;true] This is a  mistake, since now White is able to advance the dangerous pawns.} (15... e5 {is  better, transposing to the line analyzed previously after} 16. e4 c4) 16. Bc3 $1  {[%c_effect c3;square;c3;type;GreatFind;persistent;true] The pawns are ready to  move forward. It's exactly because of this that my dear friend likes Noteboom  positions.} 16... Nc5 17. a5 {Only this is a new move.} (17. Rfb1 {is also very  good for White after} 17... Nce4 18. Nxe4 Nxe4 19. a5) 17... Nb3 $5 {[%c_effect  b3;square;b3;type;Interesting;persistent;true] An interesting attempt to muddy  the waters. White's play is easy after the alternatives:} (17... Nfe4 18. Nxe4  Nxe4 19. Rfb1) (17... Nd3 18. h3 e5 19. Rfb1) 18. Bxf6 $2 {[%c_effect  f6;square;f6;type;Mistake;persistent;true] A big mistake. Ju probably evaluated  the resulting position incorrectly or missed the tactical idea of giving up the  a-pawn.} (18. Ra2 $1 {[%c_effect a2;square;a2;type;GreatFind;persistent;true] is  much stronger.} 18... Nxd2 (18... Nxa5 $2 {[%c_effect  a5;square;a5;type;Mistake;persistent;true]} 19. Rfa1 {loses material.}) 19. Qxd2  Ne4 20. Qc2 {The pawns are very strong, and White has a clear advantage.}) 18...  Nxa1 $1 {[%c_effect a1;square;a1;type;GreatFind;persistent;true]} (18... gxf6  {loses by force after} 19. Nxb3 cxb3 20. Qxb3 Rxa5 21. b6 Qc5 22. b7 Rb8 23.  Rxa5 Qxa5 24. Rb1 {The b-pawn is too strong.}) 19. Bxa1 Qxa5 {The most natural  move.} (19... Rxa5 {also leads to an equal position:} 20. Rb1 (20. Qc3 $6  {[%c_effect c3;square;c3;type;Inaccuracy;persistent;true] is wrong:} 20... f6)  20... Rb8 21. Nd4 e5 (21... Bxh2+ 22. Kf1 Be5 23. Bc3 Bxd4 24. Bxa5 Qxa5 25.  exd4 Rxb5 {with an equal endgame.}) 22. Nc6 Rxa1 23. Rxa1 Rxb5 24. Nxc4 (24. Ra6  Qb7 25. Qa4 Rb1+ 26. Nf1 h6 {with a complicated position that is equal according  to the machine.}) 24... Qxc6 25. Nxd6 $1 {[%c_effect  d6;square;d6;type;GreatFind;persistent;true]} 25... Qxd6 26. Qc8+ Qf8 27. Qd7  Rc5 28. h3 {White has enough activity to achieve an easy draw.}) 20. Qc3  ({After} 20. Ng5 {Black has a forced, but good enough, reply:} 20... g6) 20...  Qxc3 21. Bxc3 Rcb8 22. Nd4 {This is an interesting endgame. It's always very  difficult to evaluate imbalanced positions. With the benefit of having seen the  game and being able to use the computer, it's easy to say that the position is  equal.} 22... e5 $2 {[%c_effect e5;square;e5;type;Mistake;persistent;true] A  mistake that changes the evaluation. Lei wants to eliminate the b-pawn, but she  pays an expensive price. Many alternatives maintain equality.} (22... Ra3 23.  Nb1 Ra2) (22... Bc5) (22... Ra2) 23. Nf5 Bf8 24. Bxe5 Rxb5 {Despite the material  balance remaining the same, the position has deteriorated a lot for Black. White  can now organize the pieces more easily and start an attack on the vulnerable  black pawns. Hanging pawns are like inseparable brothers who share the same  fate: after one is gone (the d5-pawn), the other (the c4-pawn) usually doesn't  take long to fall.} 25. g4 $6 {[%c_effect  g4;square;g4;type;Inaccuracy;persistent;true]} (25. Bc3 $1 {[%c_effect  c3;square;c3;type;GreatFind;persistent;true] is a better way to immediately  organize the pieces, with the knight coming back to d4.}) 25... g6 26. Nd4 Rb2 $6  {[%c_effect b2;square;b2;type;Inaccuracy;persistent;true]} (26... Rb6 $1  {[%c_effect b6;square;b6;type;GreatFind;persistent;true] is a better defensive  move, preparing f7-f6.}) 27. Nb1 $1 {[%c_effect  b1;square;b1;type;GreatFind;persistent;true] An excellent move. The knight is  going to d5.} 27... Bg7 ({An instructive endgame arises after} 27... Ra1 28. Nc3  Rxf1+ 29. Kxf1 Bg7 30. Bxg7 Kxg7 31. Nxd5 {The knights should be able to give  White a win.}) 28. Bxg7 Kxg7 29. Nc3 Ra5 30. Rd1 {With all the rooks on the  board, White's task is easier. The d-pawn will be captured, and the endgame is  easily winning.} 30... Rb6 31. Nde2 Rb3 32. Kg2 h6 33. Kf3 f6 34. Rc1 $1  {[%c_effect c1;square;c1;type;GreatFind;persistent;true] An accurate move with  the idea of capturing the d-pawn without exchanging rooks.} (34. Nxd5 Rd3) (34.  Rxd5 Rxd5 35. Nxd5) 34... Kf7 (34... g5 {prevents 35.Nf4 but weakens the  f5-square.} 35. Nd4) 35. Nf4 d4 36. exd4 g5 37. Ne2 f5 {Lei tries her best to  complicate the game, but Ju gives no chances.} 38. gxf5 Rxf5+ 39. Ke3 g4 40. Nf4  Rb8 41. d5 Rf6 (41... Re8+ 42. Ne4 {and the rook is ready to capture the  c-pawn.}) 42. Rc2 Ra8 43. Nb5 Rb6 44. Nd4 Ra3+ 45. Ke4 c3 46. Nfe2 Rb2 47. Kd3  Rb1 (47... Rxc2 48. Nxc2) 48. Nxc3 Rh1 49. f3 gxf3 50. Nxf3 Rf1 51. Nd4 Ke7 52.  Kc4 Rf4 53. Rb2 {Black is unable to fight against the combined attack of the  king, rook, knights, and passed pawn.} 53... Rh4 54. Rb7+ (54. Nb5 {leads to a  mating attack after} 54... Rah3 55. Re2+ Kd7 56. d6 Rxh2 57. Re7+ Kd8 58. Kc5)  54... Kf6 55. Rb2 Ra8 56. Kc5 Rh3 57. Ncb5 Re3 58. d6 Ke5 59. Nc6+ Ke4 60. d7  Rd3 61. Nd6+ Kf4 62. Rb8 {The pawn's promotion is inevitable. Ju retains her  world title after a tense and difficult match that was played at a very high  level by both players.} 1-0

Nánar um lokaskákina á Chess.com.

Ju Wenjun hefur nú haldið heimsmeistaratitlinum síðan 2018 er hún vann Tan Zhongyi þáverandi heimsmeistara í einvígi. Síðan þá hefur lagt Katarynu Lagno og Aleksöndru Goryachkinu og nú Lei Tingjie í heimsmeistaraeinvígunum.