Nakamura on the Ropes

Only eight players remain at the World Cup. The first match games were played yesterday and the rating (and not only) favorite of the event Hikaru Nakamura suffered painful defeat with the black pieces against Pavel Eljanov. The Ukrainian GM has the tournament of his life so far:

[Event "FIDE World Chess Cup"]
[Site "?"]
[Date "2015.09.23"]
[Round "37.2"]
[White "Eljanov, Pavel"]
[Black "Nakamura, Hikaru"]
[Result "1-0"]
[WhiteElo "2723"]
[BlackElo "2814"]
[Annotator "Bojkov, Dejan"]
[PlyCount "115"]
[EventDate "2015.??.??"]
[WhiteClock "0:07:59"]
[BlackClock "0:05:58"]

1. d4 d5 2. Nf3 Nf6 3. c4 e6 4. g3 Be7 5. Bg2 O-O 6. O-O dxc4 7. Qc2 a6 8. a4
Bd7 9. Qxc4 Bc6 10. Bg5 Bd5 11. Qc2 Be4 12. Qc1 {Diagram [#] "A rare, sideline
of the Catalan" Eljanov.} (12. Qd1 {is much more popular. Giri-Leko was played
in this theme in Baku a couple of rounds earlier.}) 12... h6 13. Bxf6 Bxf6 14.
Rd1 a5 15. Nbd2 Bh7 $146 {[%csl Gf6,Gh7] Diagram [#]} ({In the recent
predecessor Black chose} 15... Bxf3 {and Eljanov considered this move the
critical line.} 16. Bxf3 c6 {but after} 17. Nc4 Nd7 18. Qd2 Be7 19. h4 $1 {
Diagram [#] White had slight but long lasting advantage without any
counterplay for his opponent, Sasikiran,K (2682)-Svetushkin,D (2592) Moscow
2015}) 16. Nb3 c6 17. Qc3 {White puts pressure on the a5 pawn thus obstructing
Black's development.} Be7 ({White wins a pawn in case of} 17... Nd7 $6 18. Ne5
$1 {Diagram [#]} Qc7 ({Or alternatively will have large positional advantage
after} 18... Bxe5 19. dxe5 Qc7 20. Rd6 $16) 19. Nxd7 Qxd7 20. Nxa5) ({Or} 17...
Na6 $6 18. Nxa5) 18. Nc5 Qc7 19. Ne5 {Now the d7 square is locked for the
black knight, but a6 is still available. This is where Nakamura goes.} Na6 {
[%cal Ga6b4] Diagram [#] Black wants to put the knight on b4 after which he
will be completely fine. Obviously Nakamura was not afraid of what came next.}
({If Black was afraid of the move in the game he might have chosen the
preperatory} 19... Ra7 {To which White has two interesting plans to pressurize}
20. Bf3 $5 ({Or he may simply push the pawns forward} 20. f4 Na6 21. e4) 20...
Na6 21. Bh5 {In both cases White is somewhat better.}) ({The computer
suggestion} 19... Rd8 {leads to stable advantage for White after} 20. Rac1 Bxc5
21. dxc5 $14 ({Or} 21. Qxc5 $14)) 20. Nxb7 $5 {The only way to create troubles
for Black.} Qxb7 21. Bxc6 Qc7 $6 {Diagram [#] But this is a mistake. The
general rule says that a rook and two pawns are usually better in the endgame
when facing the two light pieces. It is so as the rook becomes significantly
more active as the game opens and has more room to maneuver.} ({I believe
Nakamura should have opted for} 21... Qa7 $1 22. Bxa8 Qxa8 {and after} 23. Qxa5
Rb8 {True, White has three pawns and a rook now (practically an extra exchange)
but the black pieces control the board after say} 24. Qd2 Be4 {Diagram [#] and
the white queenside passers do not go anywhere.}) ({Or} 21... Qc8 $1 {which
would lead to the same.}) 22. Bxa8 Qxc3 ({Or else White will take control of
the open file} 22... Rxa8 23. Rac1 $16) 23. bxc3 Rxa8 24. Nc6 $1 {[%csl Ye7]
Diagram [#] A good practical decision. Eljanov deprives his opponent of the
bishop pair. The les pieces there are on the board, the more dangerous the
passers become.} Bd8 25. Nxd8 Rxd8 26. f3 {"Now I have a clear plan to put my
king on f2 and then slowly push the pawns. It is very unpleasant position for
Black" Eljanov.} Rc8 27. Ra3 $1 {[%cal Ga3a2,Gd1d2,Ga2b2,Rb1b8,Rb8b1] Diagram
[#] At a glance this move seems illogical, but its idea is not only to defend
the c3 pawn. White also wants to occupy the b file and for this reason both
white rooks stand better on the second rank, away from the black bishop. This
is better than} (27. Rac1 Bg6 28. e4 Kf8 {when the white pawns cannot go fast
forward-} (28... Rb8 29. Rb1) 29. c4 Ke7 30. c5 f5 $1) 27... Bg6 {Please, note
that the black rook cannot occupy easily the b file} (27... Rb8 28. e4 Rb2 29.
Raa1 $1 Rb3 30. Rdb1 Rxc3 31. Rb6 Nc7 $4 32. Rb8+ Ne8 33. Rxe8# {Diagram [#]})
28. Kf2 Rb8 29. Rd2 f6 {"After this move, strangely enough he offered a draw"
Eljanov, "I am technically winning."} 30. Raa2 $1 {Now we can clearly see the
idea behind Ra1-a3. White wins the only open file.} Rb3 (30... Rc8 31. Rab2)
31. Rab2 Rxc3 32. Rb5 {[%csl Ra5][%cal Gb5a5] Diagram [#] "I thought it is
already over for Black, but he put some pressure on me" Eljanov.} Bc2 33. Rxa5
Nc7 34. Ra7 f5 35. a5 Kh7 36. Rb7 Rc4 37. Rb6 Ba4 38. a6 Bc6 39. a7 Bd5 40. Ra2
{"I am forced to sacrifice the pawn on d4 as the one on a7 is the most
important." Eljanov} Rxd4 41. Rc2 Na8 42. Ra6 Rd1 43. h4 $1 {[%cal Gh4h5,Ga6d6,
Gd6d7,Rc2c8,Rd7h7,Rc8h8] Diagram [#] "I have a clear plan to play h4-h5 and
then to penetrate with the rooks along the seventh rank and attack the black
king" Eljanov.} h5 {But now the g5 square is weakened and the white king can
march there.} 44. Ke3 Rg1 45. Kf4 Rg2 46. Rd6 Rg1 47. Rc8 Ra1 48. Kg5 {[%csl
Gg5,Yh7] White wins two pawns by force and the game.} ({Eljanov demostrated
the alternative winning plan after} 48. Rxd5 exd5 (48... Nb6 49. a8=Q) 49. Rxa8
g6 50. Ke5 Ra5 51. e3 Kg7 52. Kd6 Kh7 53. Kc6 {[%csl Yd5][%cal Rc6b6,Yc6d5,
Ge3e8] Diagram [#] and the threat Kc6-b6 forces the black rook to abandon the
d pawn. After this White simply advances the e pawn into queen.}) 48... Rxa7
49. Rdd8 g6 50. Rh8+ Kg7 51. Rcg8+ Kf7 52. Rxg6 Ra6 53. Rh7+ Kf8 54. Kxh5 Nb6
55. Kg5 Nc4 56. h5 Nd6 57. Rf6+ Kg8 58. Rd7 {Diagram [#]} 1-0

Nakamura will fight for survival today. Report.

The Chinese Wall?

I do not know about you but for me the first association that comes with China is the Great Wall. Build long time ago to protect against the aggressors it remains one of the world's miracles.
One might expect that the players from this country will play solid chess, build a wall in front of the enemy pieces before doing anything else. Nothing is even close to the truth. Take a look at the first game of the formidable match between Wei Yi and Ding Liren, two of the best Chinese players at the World Cup:

[Event "FIDE World Chess Cup"]
[Site "?"]
[Date "2015.09.20"]
[Round "28.8"]
[White "Ding, Liren"]
[Black "Wei, Yi"]
[Result "1-0"]
[WhiteElo "2782"]
[BlackElo "2734"]
[Annotator "Bojkov, Dejan"]
[PlyCount "77"]
[EventDate "2015.??.??"]
[WhiteClock "0:02:35"]
[BlackClock "0:00:47"]

1. Nf3 Nf6 2. c4 g6 3. Nc3 d5 4. cxd5 Nxd5 5. h4 Bg7 6. h5 Nc6 7. g3 Bg4 8. h6
Bxc3 9. dxc3 Qd6 10. Bg2 O-O-O 11. Ng5 $146 {[%csl Yf7] Diagram [#] A novelty
which Ding Liren prepared for the game in the morning. He eye-witnessed the
predecessor a couple of months ago:} (11. Qa4 Qe6 12. O-O f6 13. Qc4 Bh3 14.
Bxh3 Qxh3 15. a4 g5 {and Black was doing fine in Wang,Y (2721)-Wei,Y (2725)
Zaozhuang 2015}) 11... Ne5 12. Qa4 ({"The computer suggested"} 12. Qxd5 Qxd5
13. Bxd5 Rxd5 14. c4 {"but I did not like"} Rd7 15. b3 f6 16. Bb2 Nc6 17. f3
Nd4 {Diagram [#] "and the position seems drawish" Ding Liren.}) 12... Nb6 ({
Black's difficulties are demonstrated by the line} 12... Kb8 13. Qe4 f6 14. Bf4
$16 {(Ding Liren)}) ({Maybe} 12... f6 13. Nf7 Nxf7 14. Qxg4+ Kb8 15. O-O {
which leads to very complicated line, but I think White should be better (Ding
Liren).}) 13. Qd4 {Only move.} f6 (13... Qxd4 14. cxd4 Rxd4 15. b3 {followed
by Bc1-b2 is very strong for White (Ding Liren).}) 14. Bf4 {[%csl Yd8,Re5,Yh8]
[%cal Rf4e5,Rg5f7] Diagram [#] And Wei Yi sang into deep thought (about
half-an hour).} Qxd4 15. cxd4 Nc6 $5 {A very interesting idea. Overall, Ding
Liren felt that he has better chances as his play is not that forced. For
instance in the lines:} ({Black was probably afraid of} 15... Rxd4 16. Bxe5
fxe5 17. Rc1 {when White wants Rh1-h4 or Rc1-c5. If} Bf5 18. Rh4 {anyways.
After} Rxh4 19. gxh4 {Black has problems with the knight-} Nd7 $2 {Diagram [#]}
({And if} 19... Kb8 20. Rc5 Nd7 21. Rb5 b6 22. e4 Bg4 23. f3 Bh5 24. Rd5 {and
Ding felt White has better chances.}) 20. e4 Bg4 21. f3 Bh5 22. Bh3 $18 {(Ding
Liren)}) 16. Nf7 (16. Bxc6 $2 fxg5 {wins material for Black.}) 16... Nxd4 17.
Rc1 ({The other choice was} 17. f3 {and White liked the position after} Nc2+ ({
But Ding was not that sure about the position arising after} 17... e5 $5 18.
fxg4 (18. Nxh8 Rxh8 19. fxg4 {is a better move order.}) 18... exf4 19. Nxh8
Nc2+ 20. Kf2 fxg3+ 21. Kxg3 Nxa1 22. Nxg6 hxg6 23. Rxa1 (23. Be4 $5 {alos
looks good for White.}) 23... Rh8 24. g5 fxg5 25. Rh1 Nc4 26. Kg4 {Diagram [#]
Ding Liren calculated all the way here, but somehow was not that convinced
about that line. In the final position White should win, say} Ne3+ 27. Kxg5
Nxg2 28. h7 {and the h7 pawn will cost Black the rook.}) 18. Kf2 Nxa1 19. fxg4
Nc2 20. Rc1 {with advantage for White.}) 17... e5 18. Rh4 ({White discarded
the move} 18. Be3 {due to} Nxe2 19. f3 (19. Rb1 $1 {is strong instead when
many black pieces are hanging.}) 19... Nxc1 20. fxg4 Nd3+ {and Black wins.})
18... exf4 {"I totally overlooked this"(Ding Liren) He was worried instead
about the move} (18... Bxe2 {Diagram [#] where he could not see anything for
White. Indeed, the lines that he showed are quite convincing:} 19. Be3 (19.
Bh3+ Kb8 20. Be3 Bc4 $1) (19. Nxh8 Rxh8 (19... exf4 20. Rxf4) 20. Be3 (20. Bh3+
Kb8 21. Be3 Re8 $1 22. Bxd4 exd4) 20... Bf3 21. Bh3+ Nf5) 19... Bf3 20. Bh3+
Nf5 {in all the lines Black seems OK.}) 19. Nxd8 ({Now White saw the line} 19.
Rxg4 Nxe2 20. Kxe2 ({But it seems as they both missed the strong in-between
shot} 20. Bxb7+ $1 {Diagram [#]} Kxb7 21. Nxd8+ Rxd8 22. Kxe2 {with big
advantage for White.}) 20... Rhe8+ 21. Kf1 Rd7 {when the knight is trapped.})
19... f3 $1 {The only move as if} (19... Nxe2 20. Bxb7+ Kxd8 21. Rd1+ {wins
material for White.}) 20. exf3 Nxf3+ ({The in-between check is a bad idea due
to} 20... Re8+ 21. Kf1 Nxf3 22. Rxg4 Nh2+ 23. Kg1 Nxg4 24. Nxb7 {and White is
better.}) 21. Bxf3 Re8+ $1 {[%csl Ye1] Diagram [#] Now this is strong. In
comparison} (21... Bxf3 $6 22. Ne6 Re8 (22... c6 {is better although White
keeps extra material.}) 23. Rxc7+ Kb8 24. Rxh7 Rxe6+ 25. Kd2 {simply wins for
White.}) 22. Kd2 $1 {It is important that White has this move as in the line:}
(22. Kf1 Bxf3 23. Nf7 Re7 24. Nd6+ Kd7 {the white knight is trapped due to the
bad position of the king} 25. Nb5 (25. Nc4 Be2+) 25... Be2+ {[%csl Yb5,Rf1]
Diagram [#] (Ding Liren)}) 22... Bxf3 {Or else White saves the bishop} (22...
Rxd8+ 23. Ke3 Re8+ 24. Be4 f5 (24... Bd7 25. Kd4) 25. f3 {with advantage for
the first player.}) 23. Nf7 Bc6 24. b4 {[%csl Yf7] Diagram [#] White emerged
an exchange up in the complications. He is not worse, but since his knight is
in danger he has to play very energetically. Another interesting option was} (
24. Re1 Kd7 25. Rxe8 Kxe8 26. Nh8 g5 {with unclear position.}) 24... a6 ({The
knight is saved after} 24... Rf8 25. Nd6+ cxd6 26. b5) ({However} 24... Kd7 $1
{might have ben better, for instance} 25. Rd4+ (25. Rf4 $1 {looks stronger
instead with the idea} Ke7 26. b5 $1) 25... Bd5 26. a4 c6 27. a5 Na8 28. b5 Nc7
29. a6 Nxb5 {(Ding Liren)}) 25. a4 Nxa4 $6 {Diagram [#] This is a mistake
which White missed to punish.} 26. Re1 ({Ding Liren missed in the line} 26. Rf4
$1 Nb6 27. Rxf6 Nd5 28. Rfxc6 ({The strong} 28. Rxg6 $1 {Diagram [#]} hxg6 29.
h7 $16 {which keeps the knight alive and White will enjoy an extra exchange.})
28... bxc6 29. Ng5 Nxb4 {with unclear play.}) 26... Nb6 27. Rg4 $6 {A mistake.
The correct way to sacrifice the knight was} (27. Rd4 Rf8 28. Re7 Nd5 29. Nd6+
cxd6 30. Rxh7 f5 31. Rg7 Nf6 32. Rxg6 Kd7 33. h7 {Diagram [#] (Ding Liren).
Indeed White looks fine.}) 27... Rg8 $1 {A strong move by Wei Yi that stops
the rook sacrifice on g6.} 28. Re7 Nd5 29. Nd6+ $1 ({Or else the knight will
be surrounded slowly but surely after} 29. Re1 g5) 29... cxd6 30. Rxh7 g5 {
White also gave the line} (30... f5 31. Rg7 Rxg7 32. hxg7 Ne7 33. Rxg6 Bd5 34.
Rxd6 Bg8 {with possible draw (Ding Liren)}) 31. Re4 Rg6 32. Re6 g4 (32... Kd8
33. Rxd6+ Ke8 {might be OK for Black (Ding Liren).}) 33. Rxd6 {After a long
and tensed battle with plenty of tactical nuances Wei Yi goes wrong last.} Nxb4
$2 {Diagram [#] Instead both} (33... Kb8) (33... Nb6 {were playable.}) 34. Rh8+
Kc7 35. Rd4 $1 {The rook joins the kingside battle with decisive effect.} Nd5 (
35... f5 36. Rxb4) 36. h7 Rh6 37. Rxg4 Ne7 38. Rg7 Kd7 39. Rf8 {Diagram [#]}
1-0

Report.