Baku 5.TB: Russians advance

[Event "FIDE World Cup 2015"] [Site "Baku AZE"] [Date "2015.09.25"] [Round "5.3"] [White "Svidler, Peter"] [Black "Wei, Yi"] [Result "1/2-1/2"] [ECO "D97"] [WhiteElo "2727"] [BlackElo "2734"] [Annotator "Ramirez Alvarez,Alejandro"] [PlyCount "111"] [EventDate "2015.09.11"] 1. d4 Nf6 2. c4 g6 3. Nc3 d5 4. Nf3 Bg7 5. Qb3 dxc4 6. Qxc4 O-O 7. e4 Be6 8. Qd3 c5 9. d5 Bg4 10. Ng5 h6 11. h3 Bc8 12. Nf3 e6 13. dxe6 Bxe6 14. Be3 Qe7 15. Rd1 Nc6 16. Qd6 Qxd6 17. Rxd6 {A typical Grunfeld position. Black has some problems with his c5 pawn at the moment, but he is definitely better developed than White.} c4 (17... Na5 18. Bxc5 Rfc8 19. Be3 Rxc3 $1 {With strong counterplay.}) 18. Rxe6 {An obvious exchange sacrifice. White does get enough compensation for the lost material, but it is unlikely that it is any more than that.} fxe6 19. Bxc4 Rfe8 (19... Kf7 $1) 20. Nb5 Na5 21. Bd3 {Black has some issues since a7 is hanging and there is a fork that is being threatened on c7.} Rec8 22. Ke2 Nc4 $5 {The start of an unusual series of trades.} (22... a6 23. Nd6 Rd8 24. e5 Nd7 25. Bxg6 $14) 23. Nxa7 $1 Nxe3 24. Nxc8 Nxg2 25. Ne7+ $1 (25. Rc1 Nf4+ 26. Ke3 Nxh3 $15) 25... Kf7 26. Nxg6 $1 {A nice detail. Because the knight covers f4, it cannot be ignored.} Kxg6 27. Rg1 Rxa2 (27... Nd7 28. Rxg2+ Kf7 {was probably better, gunning for the b2 pawn and taking control of e5.}) 28. Rxg2+ Kf7 29. Ne5+ {White emergest upa a pawn and retains winning chances.} Kf8 30. Ng6+ Kf7 31. Nf4 Rxb2+ 32. Ke3 Bf8 33. Bc4 Rb6 { Black is just in time to defend his pawn, but even that endgame is unpleasant.} 34. Nxe6 Rxe6 35. e5 (35. f4 Ke7 36. Bxe6 Kxe6 37. Kd4 Nd7 $1 {seems close to a draw as well.}) 35... Nd7 36. f4 b5 $1 37. Bxe6+ Kxe6 38. Rd2 b4 $1 39. f5+ Kxf5 40. Rxd7 Kxe5 {White has an extra exchange, but because of the powerful passed b-pawn and the reduced number of pawns there is nothing Svidler can do to win.} 41. Kd3 Kf6 42. Rd5 Ke6 43. Rb5 Kf6 44. Ke4 Be7 45. Kf4 Bd6+ 46. Ke4 Be7 47. Kf4 Bd6+ 48. Kg4 Ke6 49. Kh5 Kd7 {White captures the pawn on h6, but now the b-pawn is dangerous.} 50. Kxh6 Kc6 51. Rf5 b3 52. Rf1 Kc5 53. h4 b2 54. Rb1 Be5 55. Kg6 Kc4 56. Rxb2 1/2-1/2

[Event "FIDE World Cup 2015"] [Site "Baku AZE"] [Date "2015.09.25"] [Round "5.6"] [White "Wei, Yi"] [Black "Svidler, Peter"] [Result "0-1"] [ECO "A01"] [Annotator "Ramirez Alvarez,Alejandro"] [SetUp "1"] [FEN "8/8/2p1k1p1/rpB1n1n1/8/1B4P1/7P/5RK1 b - - 0 50"] [PlyCount "37"] [EventDate "2015.09.11"] 50... Nc4 51. Kg2 Ra8 52. Bb4 (52. Bc2 Ra2 53. Rf2 Rxc2 $5 54. Rxc2 Kd5 55. Bf2 b4 56. Rc1 $1 {Looks risky but is holdable.}) 52... Ne4 $1 {The knights are doing an excellent job of controlling the bishops now.} 53. Re1 Kd5 54. Rd1+ Ke5 55. Re1 Kd4 56. Rd1+ Ke3 57. Rc1 {Black's made real progress, and now Svidler goes in for the kill.} c5 58. Re1+ Kd4 59. Rd1+ Ke5 60. Bxc4 bxc4 61. Be1 Ra3 62. Kf1 Ra2 63. Rc1 Kd4 64. Rd1+ Ke3 65. Rc1 Kd3 66. Rd1+ Nd2+ {Black is simply too active. The pawn rolls forward.} 67. Bxd2 Rxd2 68. Ke1 c3 {Black threatens Ke3, Rxh2 and there is nothing White can do about it.} (68... Rxd1+ 69. Kxd1 Ke3 {is actually also winning.}) 0-1

[Event "FIDE World Cup 2015"] [Site "Baku AZE"] [Date "2015.09.25"] [Round "5.5"] [White "Karjakin, Sergey"] [Black "Mamedyarov, Shakhriyar"] [Result "1-0"] [ECO "C65"] [WhiteElo "2762"] [BlackElo "2736"] [Annotator "Ramirez Alvarez,Alejandro"] [PlyCount "72"] [EventDate "2015.09.11"] 1. e4 e5 2. Nf3 Nc6 3. Bb5 Nf6 4. d3 d6 5. O-O Be7 6. c3 O-O 7. Re1 a6 8. Ba4 b5 9. Bc2 d5 10. Nbd2 d4 11. h3 Nd7 12. Bb3 Bb7 13. Bd5 dxc3 14. bxc3 Bd6 15. Nb3 Nb6 16. c4 Na4 17. Bd2 Qe7 18. Qc2 {White has a very nice advantage. His pieces are obviously in better squares, he has targets in Black's pawn structure and Black doesn't have a good plan.} bxc4 19. dxc4 Bb4 {Black's pieces are so uncoordinated that White has decisive blow already.} 20. Bxc6 ( 20. c5 $1 {The pawn is taboo, but also there is no good way of preventing a3!} Bxc5 (20... Nxc5 21. Bxc6 Nxb3 22. axb3 Bxc6 23. Qxc6 $18) (20... Rab8 21. a3 Bxd2 22. Nbxd2 Nxc5 23. Rac1 {wins a piece anyway.}) 21. Nxc5 Nxc5 22. Rac1 $18 ) 20... Bxc6 21. Bxb4 Qxb4 22. Nxe5 Qd6 23. Nxc6 Qxc6 24. Nd4 Qc5 25. Nb3 Qe5 26. Rad1 {White is up a pawn with a good position, but in such fast time control anything can happen...} Rfe8 27. Re3 Rab8 28. Rd5 Qb2 29. Qxb2 Nxb2 30. c5 Nc4 31. Re2 a5 32. Rd4 a4 33. Rxc4 axb3 34. axb3 Rxb3 35. Rd2 Kf8 36. f3 Rb5 {It seems like Mamedyarov is hanging on like a champ. The rook endgame is by no means easy to win. Black is active and if he can somehow trade off the c-pawns he will be in great shape to hold a 4v3 draw. However, Mamedyarov flagged! With this loss he was forced to win the next game.} 1-0