Mundial femenino P6: Hou Yifan amplía la ventaja

[Event "Women's World Championship"] [Site "?"] [Date "2016.03.09"] [Round "6"] [White "Muzychuk, Mariya"] [Black "Hou , Yifan"] [Result "0-1"] [ECO "C54"] [WhiteElo "2563"] [BlackElo "2667"] [Annotator "Adrian Mikhalchishin"] [PlyCount "76"] [EventDate "2016.03.09"] [SourceDate "2016.03.09"] 1. e4 e5 2. Nf3 Nc6 3. Bc4 Bc5 4. O-O Nf6 5. d3 d6 6. c3 O-O {[#]} 7. Bg5 { Choosing the sharpest line and not the cautious 7.h3 from game one.} h6 8. Bh4 g5 9. Bg3 ({Of course, here one mus always be attentive to the typical piece sacrifice} 9. Nxg5 hxg5 10. Bxg5 Kg7 11. Qf3 ({Much more useful is} 11. b4 $1 { to avoid Bc5xa3 after the white knight starts it maneuver Na3-c2-e3-d5.} Bb6 12. Qf3 Rh8 13. Na3) 11... Be6 $6 ({Better is} 11... a5 12. Nd2 (12. Na3 $5 Bxa3 13. bxa3 Rh8 14. Rab1 $13) 12... Rh8 13. h4 Qe7 14. a4 Nd8) 12. Nd2 (12. b4 Bb6 13. Nd2 Rh8 14. Bd5) 12... Rh8 13. h4 (13. b4) 13... Qe7 14. Bd5 Nxd5 $6 15. Bxe7 Ndxe7 16. b4 Bb6 17. b5 $2 (17. g3 $5 Rh6 18. Nc4) 17... Na5 (17... Rxh4 18. g3 Bg4 19. Qg2 Bh3 20. Qh2 Rh6 21. bxc6 Bxf1) 18. g3 Rag8 {with unsufficient compensation for the queen, Vajda,L (2511)-Sutovsky,E (2628)/ Turin 2006}) 9... g4 {A very sharp line.} ({More usual is} 9... Bg4 10. h3 (10. Nbd2 Nh5 (10... a6 11. a4 Ba7 12. Re1 Nh5 13. h3 Bc8 14. Nf1 Qf6 15. Ne3 Ne7 ( 15... Nxg3 16. fxg3 h5) 16. d4 exd4 17. cxd4 Nxg3 18. fxg3 Nc6 {with strong pressure, Lie,K (2509)-Khairullin,I (2657)/Yerevan 2014}) 11. Kh1 Qf6 12. h3 Bd7 13. d4 exd4 14. Nxd4 Nf4 15. Nxc6 Bxc6 16. Qg4 Rae8 17. b4 Bb6 18. a4 a6 { equality, Ponkratov,P (2582)-Khismatullin,D (2656)/Tomsk 2011}) 10... Bh5 11. b4 Bb6 12. Nbd2 Ne7 13. Re1 Ng6 14. Qc2 g4 15. hxg4 Nxg4 16. d4 Qf6 17. Be2 Nf4 18. Nc4 {with better play, Yudasin,L (2505)-Tukmakov,V (2590)/Simferopol 1988}) 10. Nh4 Nh5 11. a4 a6 12. Na3 Qg5 13. Nc2 Ba7 14. Ne3 $5 ({Here there are two options} 14. d4 Bd7 15. Qd3 Rae8 16. b4 Ne7 17. f3 Ng6 18. Nxg6 Qxg6 19. fxg4 Nxg3 20. Qxg3 exd4 21. Nxd4 Qxe4 22. Rf4 Qe3+ 23. Kh1 Qxg3 24. hxg3 Re3 { Black has good chances,Jakovenko,D (2733)-Bok,B (2572)/Caleta 2015}) (14. b4 Nxg3 15. hxg3 Be6 16. Qe2) 14... Ne7 ({Black also had to calculate the pawn sacrifice tendered by White after} 14... Bxe3 15. fxe3 Nxg3 16. hxg3 Qxe3+ 17. Kh2 Qg5 18. Qb3 Qg7 19. Nf5 {with a strong inititiative .}) 15. d4 (15. Qb3 { was also interesting. Ex:} Bxe3 16. fxe3 Qxe3+ 17. Bf2 Qg5 18. g3 Ng7 19. Rae1 Ne6 20. Be3 {with excellent compensation.}) 15... Qg7 $2 {At first sight, this appears to be a strange move, but the underlying idea in a different move order could have caused problems for White.} ({Instead of the immediate 15... Qg7 as in the game, Black would have cause White trouble had she instead first played} 15... Nxg3 16. hxg3 exd4 17. cxd4 {and only now} Qg7 $1) 16. dxe5 dxe5 {[#]} 17. Nef5 $2 {Possibly Maria was trying to strike quickly, but it would have been better for her to prepare this maneuver first.} (17. Qd2 {first was better, with the idea} Nxg3 18. hxg3 h5 19. Rad1) 17... Bxf5 18. exf5 Bc5 { Black tries to transfer the bishop to d6} ({However, better was to bring the knight to d6 instead with} 18... Nxg3 19. hxg3 Nc8 $1) 19. Re1 $6 ({White misses an opportunity to gain a significant upperhand with} 19. f6 $1 Qxf6 ( 19... Nxf6 20. Bxe5) 20. Qxg4+ Qg5 21. Qf3 Rab8 22. Rfe1 {with much better play.}) 19... Nxg3 20. hxg3 Kh8 21. Qe2 $5 ({I was commenting this game together with GM Andrei Volokitin and he offered here} 21. Re4 h5 22. Qe2 Bd6 23. f4 (23. Rd1 $1) 23... exf4 24. Rxe7 Qf6 25. Rxf7 Rxf7 26. Bxf7 Qxf7 27. gxf4) 21... Bd6 22. Qe4 Rab8 {[#]} 23. Be2 $2 {An incomprehensible mistake. How can White consider removing the bishop from its powerful attacking outpost on c4??} ({White still kept huge initiative on White squares after} 23. f6 Qxf6 24. Qxg4 Rbd8 25. Qe4) 23... h5 24. Rad1 Ng8 25. Kh2 $2 ({It was possible to still improve the position with} 25. a5 Nf6 26. Qe3 Rbd8 27. Bc4) ({or} 25. Qe3 Nf6 26. b4) 25... Qg5 26. Bc4 ({It is psychologically very difficult to to start playing for a draw with the pawn sacrifice} 26. f6 Nxf6 27. Qf5) 26... Nf6 27. Qe3 {White simplifies the game into a clearly worse endgame.} ({ Not better is} 27. Qc2 e4) 27... Qxe3 28. Rxe3 e4 29. Re2 Rbd8 ({Very good was Volokitin's proposal} 29... Kg7) 30. Bb3 Rd7 31. f3 Re8 32. Rde1 Rde7 33. Bc2 { [#]} {After some thinking Hou Yifan finds the winning sequence.} exf3 $1 34. Rxe7 Rxe7 35. Rxe7 f2 $1 36. Rxf7 (36. Bd3 Bxe7) 36... f1=Q 37. Ng6+ Kg8 38. Rxf6 ({Immediately losing was} 38. Bb3 Bxg3+ 39. Kxg3 Ne4+ 40. Kh2 g3+ 41. Kh3 Qh1#) 38... Bc5 $1 0-1