Baku 3.2: Plenty of results

[Event "FIDE World Cup 2015"] [Site "Baku AZE"] [Date "2015.09.18"] [Round "3.9"] [White "Wei, Yi"] [Black "Areshchenko, Alexander"] [Result "1-0"] [ECO "B97"] [Annotator "Ramirez Alvarez,Alejandro"] [PlyCount "77"] [EventDate "2015.09.11"] [SourceDate "2015.02.07"] 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Bg5 e6 7. f4 Qb6 8. Qd2 Qxb2 9. Rb1 Qa3 10. e5 h6 11. Bh4 dxe5 12. fxe5 g5 13. exf6 gxh4 14. Be2 Qa5 15. O-O Nd7 16. Rbd1 $5 (16. Kh1 {is almost universally played, Wei Yi comes in with a twist in the sharpest Najdorf!}) 16... h3 {In the only other game in the database this move was played, but Wei Yi had anticipated it.} (16... Qg5 {is the computer choice, but surely Wei Yi had something prepped here. It's amazing that even in the computer era the Poisoned Pawn Najdorf remains a mystery.}) 17. g3 Bb4 {Going for it. From a practical point of view one has to wonder whether it is a good idea to accept a piece sacrifice which your opponent had obviously prepared at home. But that being said, that is what you are supposed to do in the Poisoned Pawn, isn't it?} 18. Qe3 $1 Bxc3 $5 {Picking up the gauntlet.} (18... Qg5 $5) 19. Nxe6 {What else?} Qe5 $2 {Perhaps this move cost Areshchenko the game.} (19... fxe6 $1 {Black had to go for it.} 20. Qxe6+ Kd8 21. Qe7+ Kc7 22. Qd6+ Kd8 23. f7 Bg7 {otherwise Black gets mated really quickly. Now however things are not so clear.} 24. Rd5 (24. f8=Q+ Rxf8 25. Rxf8+ Bxf8 26. Qxf8+ Kc7 27. Qd6+ Kd8 {is just a perpetual. Did Wei Yi have something in mind or was he bluffing?}) 24... Qc3 $1) 20. Nc7+ Kf8 21. Qxe5 Bxe5 22. Nxa8 Nxf6 23. Nb6 {The problem for Black is that he doesn't have any compensation for the lost material. Wei Yi shows excellent technique and takes the game:} Kg7 24. Nxc8 Rxc8 25. Rf5 Bb8 26. Rdf1 Ba7+ 27. Kh1 Bd4 28. Bd3 Rc6 29. g4 Rc7 30. g5 hxg5 31. Rxg5+ Kf8 32. Rg3 Nd5 33. Rxh3 Ne3 34. Rf4 Ba7 35. Re4 Nd1 36. Rh8+ Kg7 37. Rh7+ Kf8 38. Rc4 Bc5 39. Bg6 1-0

[Event "FIDE World Cup 2015"] [Site "Baku AZE"] [Date "2015.09.18"] [Round "3.13"] [White "Wojtaszek, Radoslaw"] [Black "Granda Zuniga, Julio E"] [Result "1-0"] [ECO "D37"] [Annotator "Ramirez Alvarez,Alejandro"] [PlyCount "69"] [EventDate "2015.09.11"] [SourceDate "2015.02.07"] 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bf4 O-O 6. e3 Nbd7 7. Be2 dxc4 8. O-O a6 9. a4 Nh5 10. Bxc4 Nxf4 11. exf4 c6 12. Qe2 Qa5 13. Bb3 Rd8 14. Rfd1 g6 15. Ne4 Nf6 16. Neg5 Nd5 17. g3 Bd7 18. h4 h5 19. Ne5 Be8 20. Qf3 Bf8 21. g4 $1 hxg4 22. Nxg4 Bg7 23. h5 $1 gxh5 24. Ne5 Nf6 25. f5 {Opening the b3 bishop is the nail in the coffin for Black.} Rxd4 26. Rxd4 $2 {Underestimating Black's chances!} (26. fxe6 $1 Qxe5 27. exf7+ Bxf7 28. Nxf7 Qf4 29. Ne5+ $1 Kh7 30. Rxd4 Qxe5 (30... Qxd4 31. Qf5+ {gets mated}) 31. Qd3+ $18 {is much cleaner.}) 26... Qxe5 27. Rad1 Nd5 {Suddenly things are not so clear.} 28. Bc2 exf5 (28... Qf6 $1) 29. Qxh5 Nf4 $6 30. Qh7+ Kf8 31. Nf3 $1 {Black's pieces are in an uncomfortable position. Granda cracks.} Qe2 $2 (31... Qc7 32. R4d2 $16) 32. Rxf4 (32. Qxf5 $1) 32... Qxc2 33. Rd2 Qb1+ (33... Qc1+ $1 34. Kg2 Rd8 {was the only way to fight, but after} 35. Rxd8 Qxf4 36. Rxe8+ Kxe8 37. Qxg7 Qxa4 { White should comfortably convert.}) 34. Kg2 c5 35. Rxf5 {White's attack is too strong. Rxf7+ threatens to win the queen on b1, and Black can't afford to break the pin because of Rg5 - and other winnig moves.} 1-0