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So, Wesley (2771) - Nakamura, Hikaru (2791) [E05]
Sinquefield Cup 2016, Saint Louis (1) 2016

Notes by Boris Schipkov

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3








   
4...Be7
The Catalan Opening.
5. Bg2 O-O 6. O-O dxc4 7. Ne5 Nc6 8. Nxc6 bxc6 9. Na3 Bxa3 10. bxa3 Ba6 11. Qd2 Rb8 12. Qa5 Qc8








   
13. a4
In the game Li, C - Wang, H, Huaian 2016 White played 13. e4 Rd8 14. Rd1 Rb5 15. Qc3 c5 16. d5 exd5 17. exd5, and here 17...c6 was better, 18. a4 Rb4 19. d6 Nd5 20. Bxd5 cxd5 21. Rxd5 f6=, with equality.
13...Rd8 14. Ba3
Now 14. Qc5?! is dubious, 14...Nd5 15. e4? (15. Bg5) 15...Nc3 16. Be3 Nxa4, and Black had an advantage in Zhao ,J - Hou, Y, Xinghua 2012. After 14. Rd1 Nd5 (14...c3! is better, 15. Qxc3 Bxe2 16. Rd2 Ba6=, with equality) 15. Ba3 f5 16. Bc5 (16. e4) 16...Rb6?! (16...c3) 17. e4 (17. Bxb6! cxb6 18. Qd2) 17...fxe4 18. Bxe4 White had a small edge in Li, C - Harikrishna, P, Huaian 2016.
14...Rxd4
14...Rb6?! is worse, 15. Bc5 Rb2 16. e3 (16. Rab1!) 16...Nd7 17. Be7 Re8 18. Ba3 Rb6, with a small edge to White, Melkumyan, H - Fridman, D, Reykjavik 2015. .









   
15. Rfb1!?
A novelty. After 15. Rab1 Rb6 16. Bc5 Black can continue 16...Rd8 17. Bxb6 cxb6 18. Qc3 (18. Qe5) 18...Nd5 19. Qc2, with equality in Kohlweyer, B - Grochal, J, Vlissingen 2013 or 16...Rd7!? 17. Bxb6 (17. Rfd1? Qd8, and Black is better) 17...cxb6 18. Qe5, with equality. 16...Rd5?! is worse, 17. Bxd5 cxd5 18. Bxb6 axb6, Efimenko, Z - Sakaev, K, Vrnjacka Banja 2010, and here White can play 19. Qd2! Nd7 20. a5 b5 21. a4, with a clear advantage.
15...Rb6 16. Bc5 Rd7 17. Rd1








   
17...h6?
The decisive mistake. Black must play 17...Nd5 or 17...Rxd1+!? 18. Rxd1 Rb8 19. e3 (19. Bxa7 Ra8=, 19. Bxc6 Bb7=) 19...Qb7=, with equality.
18. Rxd7 Nxd7 19. Bxb6 cxb6 20. Qd2! c5








   
21. Rd1!
White must trade queens, and the rook can attack pawns in the centre and on the queenside, so this endgame is won for White. Usually 'bishop + 2 pawns' are not worse than 'one rook', but in the position without queens the rook is stronger.
21...Nf6 22. Kf1
White can play 22. Qd8+ Qxd8 23. Rxd8+ Kh7 24. Kf1, winning.
22...Kh7 23. Qc2+?!
23. Qd8! is the best move here, and White wins the endgame.
23...Kg8?!
23...g6 is better.
24. Qd2 Kh7








   
25. Qd8!
The strongest move, and White wins.
25...Qxd8 26. Rxd8 c3 27. Ke1 Bc4 28. Kd1 Bxa2 29. Kc2 Bc4 30. e3 b5 31. Kxc3 a6 32. Ra8 Nd5+ 33. Bxd5 exd5








   
34. a5!
Of course, White keeps the a-pawn.
34...b4+ 35. Kd2 Bf1 36. Rc8! c4 37. Rb8! b3 38. Kc3
After 38...g6 39. Rd8 Bd3 White grabs a pawn with 40. Rxd5 and easily wins the ending, 40...Kg7 41. Rd6 Kh7 42. Rb6 Kg7 43. Rxb3 (or 43. f3) cxb3 44. Kxd3 Kf6 45. Kc3 Ke5 46. Kxb3 Kd5 47. Kb4.
Black resigned. 1-0










Move
   

So, Wesley (2771) - Nakamura, Hikaru (2791) [E05]
Sinquefield Cup 2016/Saint Louis (1) 2016

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. g3 Be7 5. Bg2 O-O 6. O-O dxc4 7. Ne5 Nc6 8. Nxc6 bxc6 9. Na3 Bxa3 10. bxa3 Ba6 11. Qd2 Rb8 12. Qa5 Qc8 13. a4 Rd8 14. Ba3 Rxd4 15. Rfb1 Rb6 16. Bc5 Rd7 17. Rd1 h6 18. Rxd7 Nxd7 19. Bxb6 cxb6 20. Qd2 c5 21. Rd1 Nf6 22. Kf1 Kh7 23. Qc2+ Kg8 24. Qd2 Kh7 25. Qd8 Qxd8 26. Rxd8 c3 27. Ke1 Bc4 28. Kd1 Bxa2 29. Kc2 Bc4 30. e3 b5 31. Kxc3 a6 32. Ra8 Nd5+ 33. Bxd5 exd5 34. a5 b4+ 35. Kd2 Bf1 36. Rc8 c4 37. Rb8 b3 38. Kc3 1-0


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© 2016 Boris Schipkov