Ivanchuk líder en solitario en Tata Steel

[Event "?"] [Site "?"] [Date "2015.01.13"] [Round "4"] [White "GM Ivanchuk"] [Black "GM Vachier-Lag"] [Result "1-0"] [ECO "B90"] [WhiteElo "2715"] [BlackElo "2757"] [Annotator "Houdini 4 Pro x64 (10m)"] [PlyCount "59"] [EventDate "2015.??.??"] {B90: Defensa Siciliana (Variante Najdorf, desviaciones)} 1. e4 c5 2. Nf3 d6 3. d4 cxd4 4. Nxd4 Nf6 5. Nc3 a6 6. Be3 Ng4 7. Bc1 Nf6 8. Be3 Ng4 9. Bg5 h6 10. Bh4 g5 11. Bg3 Bg7 12. h3 Ne5 13. Be2 Nbc6 14. Nb3 (14. Nf5 Bxf5 15. exf5 O-O 16. Nd5 e6 17. Ne3 d5 18. fxe6 fxe6 19. O-O Ng6 20. Bg4 Qf6 21. c3 Nf4 22. Re1 Rad8 23. Qb3 Rf7 24. Rad1 {1/2-1/2 (24) Szabo,G (2506)-Safarli,E (2564) Budva 2009}) 14... b5 $146 (14... Ng6 15. Qd2 Be6 16. h4 Nxh4 17. Bxh4 gxh4 18. Rxh4 Rc8 19. O-O-O Qb6 20. Bg4 Bxc3 21. bxc3 Bxg4 22. Rxg4 Ne5 23. Rg3 Qc6 24. Qd4 Rf8 25. Nd2 Qb5 26. Rh1 Nc4 27. Nxc4 Rxc4 28. Qd3 Qc6 29. Re3 {Tolnai,T (2520) -Pigusov,E (2575) Lyon 1994 1/2-1/2 (44)}) 15. a4 b4 16. Nd5 e6 17. Ne3 Bb7 18. Qd2 Qc7 19. O-O-O O-O-O (19... Rd8 20. Kb1 $14) 20. Kb1 $16 Kb8 21. f3 a5 22. h4 Na7 23. Nd4 (23. Bf2 Bf6 $16) 23... Ng6 24. hxg5 hxg5 25. Rxh8 Bxh8 26. Bc4 (26. Nc4 $5 Bxd4 27. Qxd4 $16) 26... Nf4 27. Bb3 Qc5 28. Nc4 Ba6 $2 (28... d5 $142 29. Ne2 e5 $16) 29. Bf2 $18 Bxc4 30. Nb5 1-0