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Hikaru Nakamura vs Mariya Muzychuk
Tradewise Gibraltar (2016), Catalan Bay GIB, rd 5, Jan-26
Semi-Slav Defense: Stoltz Variation. Shabalov Attack (D45)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Jan-30-16  althus: Yeah, I wonder if she miscalculated the tactics of 17. Nxd5 or misevaluated one of the positions down the road as holdable. Either way, things went very very wrong at that point there.
Feb-01-16  Cactusjuice: Absoultely outplayed
Feb-03-16  ChessMan94: Keep in mind Mariya is the women's world champion and still was dismantled by Naka. Well, the real women's champion is Hou. She'll regain the crown soon.
Feb-04-16  onur87: crushing pawns.
Feb-06-16
Premium Chessgames Member
  tpstar: 23. Qxg6+ must have been a fun move to play.

17 ... Nxd5 with a Discovery on the Nh4 looks interesting.

Feb-09-16
Premium Chessgames Member
  ajk68: What's wrong with 18...Nxd5, ?
Feb-28-17  Stardeliskon: 18...Nxd5 loses to 19.Qe4+ and if 19...Ne7 20.Qxa8, and if 19...Qe7, 20.Qxd5.

Of course, there is an even better move either at 19. or at 20., and that's 20.Nxg6!, which is crushing as there is no way to stop the threats of Qxg6, Bc4 and Rdf1.

Jul-22-17
Premium Chessgames Member
  An Englishman: Good Evening: First things first--<tamar's> Jan-30-16 post is *brilliant.* Second, this had to be an intuitive sacrifice even for Nakamura because Black had so many possible defenses. Solved it to the extent that I saw the first 3-5 moves in multiple variations.
Jul-22-17  jith1207: In the end, Black has all minor and major pieces - basically the second rank cavalry of the army - at disposal for four pawns less, but couldn't save the king.
Jul-22-17
Premium Chessgames Member
  al wazir: I went astray with 19. Nxg6. After 19...fxg6+, 20. Qxg6 Kf8 21. c6 Nb8 looked pretty good, but I don't see where to go from there. 19...Rg8 is probably playable too.
Jul-22-17  Ariogermano: 19.c6 ?!
Jul-22-17
Premium Chessgames Member
  agb2002: White has an extra pawn.

Black threatens bxc3 and the black queen x-rays the knight on h4.

I would probably play 17.Nxd5 cxd5 (17... Nxd5 18.exd5 Qxh4 19.dxc6 with three pawns for a knight and attack) 18.exd5 Nxd5 19.Nxg6 fxg6 (19... Rg8 20.Nf4 Nxf4 21.exf4 with a similar conclusion) 20.Qxg6+ Ke7 (20... Kf8 21.Bc4 with the double threat Bxd5 and Rhf1+ looks good for White) 21.Qg7+ Ke6 (21... Ke8 22.Qxh8+) 22.e4 and White seens to have more than enough compensation (22... N5f6 23.Bc4+ Nd5 24.Bxd5#).

That's all I can do today.

Jul-22-17  goodevans: <al wazir: I went astray with 19. Nxg6>

Yes, the most surprising thing about this whole attack was that it didn't include 19.Nxg6.

Jul-22-17  RandomVisitor: After 15...Qe7 things would have been equal


click for larger view

Stockfish_17061704_x64_modern: <4.5 hours computer time>

<0.00/44 16.f4 a5> 17.Be1 Ra7 18.Ng2 0-0 19.Bh4 Qe8 20.Be2 Nh7 21.Kb1 Ba6 22.b3 Kg7 23.Rdf1 Rh8 24.Rhg1 Nhf6 25.Be1 Ra8 26.Bg3 Qb8 27.Be1 Qe8

-0.18/43 16.Kb1 exf3 17.Nxf3 b4 18.Na4 a5 19.e4 Nxe4 20.Nb6 Bxb6 21.cxb6 0-0 22.Bxh6 Re8 23.Re1 Nxb6 24.Bd3 Ba6 25.Bxa6 Rxa6 26.Qxc6 Qe6 27.Qxe6 Rxe6 28.Ng5 Nxg5 29.Bxg5 Nc4 30.h4 a4 31.Kc2 b3+ 32.axb3 axb3+ 33.Kc3 Rec6 34.Be7 Nd6+ 35.Kxb3 Ne4 36.Bc5 Nxc5+ 37.dxc5 Rxc5 38.Re8+ Kg7 39.Rb8 Rf6 40.g5 Rf4 41.Rb4 Rf2 42.Ka2 Rd2 43.Kb1 Rc8 44.Rc1 Rxc1+ 45.Kxc1 Rh2 46.Rd4

-0.34/43 16.a3 0-0 17.f4 a5 18.Na2 b4 19.axb4 axb4 20.Kb1 Ba5 21.Qa4 Bb7 22.Bxb4 Bc7 23.Qc2 Rfb8 24.Bc3 Qd8 25.Rg1 Qc8 26.Nb4 Ba5 27.Kc1 Qd8 28.Na2 Bxc3 29.Nxc3 Bc8 30.Ng2 Qa5 31.Be2 Qb4 32.Rgf1 Ne8 33.Kd2 Nc7 34.f5 g5 35.Rb1 Ba6 36.Bxa6 Nxa6 37.Ke2 Qb7 38.Kf2 Nb4 39.Qe2 Kh7

Jul-22-17  latebishop: How does White's attack proceed after 26...Kg8?
Jul-22-17  Cheapo by the Dozen: I thought this was pretty easy, because a pawn storm in the center would at least win the piece back.

However, I missed the ... Bg3 Zwischenzug.

Jul-22-17  RandomVisitor: <al wazir: I went astray with 19. Nxg6. After 19...fxg6+, 20. Qxg6 Kf8 21. c6 Nb8 looked pretty good, but I don't see where to go from there. 19...Rg8 is probably playable too.> In that line, after 21.e4! Qe8 22.Bxh6+ Ke7 23.Qg5 Kd8 24.Bg2 black is losing.
Jul-22-17  RandomVisitor: <latebishop>< How does White's attack proceed after 26...Kg8?>I think RxN with mate to follow.
Jul-22-17  RandomVisitor: Black could have set a nice trap with 10...Nb6. If 11.h3 then Nxg4.


click for larger view

Stockfish_17061704_x64_modern:

<-0.27/38 10...Nb6 11.h3 Nxg4> 12.hxg4 Qxh4 13.c5 Bh2 14.Rh1 Bxg4 15.cxb6 Bf3 16.Rxh2 Qxh2 17.bxa7 0-0 18.Qa4 Qc7 19.Ne2 Qb6 20.Qa5 Qxa7 21.Qxa7 Rxa7 22.a4 h5 23.Bb4 Rfa8 24.b3 Re8 25.Bd6 h4 26.b4 g5 27.Nc3 Re6 28.Bc7 Ra8 29.a5 Rh6 30.Be5 g4 31.b5 h3 32.Bh2

Jul-22-17  RandomVisitor: 10...Bxh2 might have been good for black.


click for larger view

Stockfish_17061704_x64_modern:

<-0.52/39 10...Bxh2 11.Rg2 Bb8> 12.0-0-0 Nb6 13.Be2 Nxc4 14.Bxc4 dxc4 15.Nxe4 a5 16.f3 g6 17.Rh1 Bc7 18.Qxc4 Be6 19.Qa4 h5 20.g5 Nxe4 21.fxe4 Qd7 22.Kb1 Bh3 23.Rgg1 Bg4 24.Qc2 Bd8 25.Rf1 Bxg5 26.Nf3 Bxf3 27.Rxf3 h4 28.Bc3 Rh5 29.Rhf1 h3 30.Qh2 Qe6 31.e5 Qd7 32.Bd2 Kf8 33.Rh1 Kg7 34.Rxh3 Qf5+ 35.Ka1 Qxh3

Jul-22-17  patzer2: <tamar: chanco-Better at least than hearing Naka singing "How do you solve a problem like Mariya?> Without anything more than an intuitive guess as to how to solve today's extremely difficult Saturday (17. ?) puzzle, I thought of another lyric from the Sound of Music:

"You are 16 going on 17
Baby its time to think
Better beware
Be canny and careful
Baby you're on the brink"

Unfortunately for Mariya in this game there's not much chance the 2015 Women's World Champion has of using her own uncanny tactical skills to escape the perils she faces after Nakamura's 17. Nxd5!! cxd5 18. exd5 (+2.16 @ 31 depth, Stockfish 8:)

[Stockfish 8 64] 31:+2.16] 18...Kf8 19.e4 Kg7 20.Bc4 Ba6 21.d6 Bxc4 22.dxc7 Qxc7 23.Qxc4 Nxe4 24.Rhf1 Rhf8 25.Bf4 Qc6 26.Nf3 Rac8 27.Rde1 g5 28.Be5+ f6 29.Bh2 Rfe8 30.Kb1 Re7 31.h4 Rce8 32.Ka1 Nexc5 33.dxc5 Rxe1+ 34.Rxe1 Rxe1+ 35.Nxe1 Qxc5 36.Qxc5 Nxc5

After the end of the position in this analysis, the move 37. h4 (+4.58 @ 32 depth, Stockfish 8) gives White a clearly decisive advantage.

P.S.: One amusing possibility is if Black decides to get greedy and capture the "free pawn" with 18...Nxd5? (diagram below)


click for larger view

In that case, White sacrifices a second Knight for a crusing position with 18...Nxd5 19.Nxg6! fxg6 20.Qxg6+ Kf8 21.Bc4 (+5.03 @ 29 depth, Stockfish 8) when play might continue 21...Qf6 22.Rhf1 Nf4 23.Qe4 Ra7 24.exf4 Bb7 25.Qc2 Ke8 26.Rfe1+ Kd8 27.Re6 Qf7 28.f5 Qg7 29.Rg6 Qe7 30.Re1 Qf8 31.c6 (+10.91 @ 25 depth, Stockfish 8.)

Jul-22-17  morfishine: I figured it was a "sac" on <d5>
Jul-22-17  ColeTrane: A great game for study to all the Shabalov fans
Jul-22-17  Andrew Chapman: <latebishop>< How does White's attack proceed after 26...Kg8?>Remember that after RxN,NxN,QxN+, Kg8, White has Qg6+.
Jul-22-17  Walter Glattke: The notation is: 27.Rxf6 Nxf6 28.Qg6+
(Bf7 pinned) Kh8 29.Qxf6+ Kg8 30.Qg6+ Kh8 31.Qh7#

26.-Rg8 27.Nxf7+ Qxf7 28.Bxf7 Bxf1 29.Rxf1 Be7 30.g5 Nd7 31.g6 Rxg6 32.Bxg6 Nf8 33.Rxf8+ Bxf834.Qxh7#

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