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Peter Svidler vs Alexey Nazirzhonovich Korotylev
Russian Championship Superfinal (2004), Moscow RUS, rd 7, Nov-22
Sicilian Defense: Richter-Rauzer. Ivanov Variation (B63)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
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Oct-21-12
Premium Chessgames Member
  wordfunph: magnificent 51.Nxh6+!
Oct-03-14
Premium Chessgames Member
  Lighthorse: Got it today.
51.Nxh6+ gxh6 52.g7 Qxg7 53.Rg2

White wins the Black Queen for a Rook and Knight and shatters the Black King side position.

Oct-03-14
Premium Chessgames Member
  An Englishman: Good Evening: Had to see the second move to claim full credit. Good examples of line-opening sacrifices; Black chose to lose the Queen rather than face White's major pieces on the g- and h-files.
Oct-03-14
Premium Chessgames Member
  al wazir: When you're told that there's a winning attack here, it's easy to find the first few moves. But if black plays 52...Qf7, then it's not obvious how white continues.
Oct-03-14  dfcx: 51? white to move, material even.
51.Nxh6+ gxh6 52.g7!
A) 52...Qxg7 53. Rg2 Bg5 54. fxg5


click for larger view

followed by 55.g6
B) 52...Qf7 53. Rxh6 and black is worse than A)
C) 52...Qf6 53.Qh5 and the rook has no place to go.
D) 52...Kxg7 53.Rg2+ Kh8 54.Qh5 Bg5 55. Rxg5 Rh7 56. Bxh7

Oct-03-14  plumbst: Difficult. Material is even.

50 moves played and still in the middlegame? Weird. Anyway, the most obvious try is..

51.Nxh6+! gxh6 (51...Kh8 52.Nf7+ Kg8 53.Rh8#)

52.g7! Qf6.

(52...Qxg7 53.Rg2 Bg5 54.fxg5 hxg5 55.Rh5 Rc5 56.Qe3 does the trick;

If 52...Kxg7,
53.Rxh6! Bg5 [53...Kxh6 54.Rh2+ mates]
54.Rh7+ Kg8 [54...Kf6 55.fxg5+]
55.Qh5 Qf6 56.Qxe8+ Qf8 57.Rh8+! Kxh8 58.Qxf8#)

53.Rdh2 Bd6 (53...Kxg7 54.Qg4+)
54.Rxh6 Qxf4
55.Qh5! (threatening Rh8+ and Qxe8+) Qxe4+
56.Ka1 Qxh1+
57.Qxh1 Kxg7 (57...Rxg7 58.Rh8)
58.Qh5.

Black has to give up tons of material to avoid mate.

Oct-03-14  diagonalley: well, i managed to identify the theme whereby white gains a Q for R+B but converting that into a win is no trivial task... hard indeed
Oct-03-14  David2009: Svidler vs A Korotylev, 2004 White 56: after 51.Nxh6+ gxh6 52.g7 Black finds the toughest defence Qxg7. Later in the game we reach with Black to play:


click for larger view

Here Black played 59...Be8 and lost quickly. What was wrong with 59...exf5 - if 60.Bxf5 Bxf5 CHECK.

<al wazir: When you're told that there's a winning attack here, it's easy to find the first few moves.> Nicely put.

Oct-03-14  newzild: <David2009> <What was wrong with 59...exf5 - if 60.Bxf5 Bxf5 CHECK.>

Instead of 60. Bxf5? White has 60. Qg3!

Oct-03-14  pensiveyaks: 51. Rxh6 gxh6 52. Nxh6+ Kg7 53. Nf5+ exf5 54. Qh2+ also wins and it seems faster.
Oct-03-14
Premium Chessgames Member
  agb2002: White has a bishop and a knight for the bishop pair.

Black seems to be preparing some counter chances based on ... Bxa3.

The obvious move is 51.Nxh6+ gxh6 (51... Kh8 52.Nf7+ Kg8 53.Rh8#) 52.g7:

A) 52... Kxg7 53.Rxh6 (threatens 54.Qg3+)

A.1) 53... Kxh6 54.Qh3+ Bh4 (54... Kg7 55.Qh7+ Kf6 56.Qg6#) 55.Qxh4+ Kg7 56.Rg2+ Kf7 57.Qh7+ and mate next.

A.2) 53... Bf6 54.Qg4+ Kf7 (54... Kxh6 55.Qg6#) 55.Qg6+ Ke7 56.Rh7+ and mate in two.

B) 52... Qxg7 53.Rg2 Bg5 54.fxg5

B.1) 54... hxg5 55.Rh7 Qxh7 (55... Qf8 56.Qxf8+ and 57.Rxc7 + -; 55... Rf8 56.Rxg7+, etc.) 56.Bxh7+ Rxh7 (56... Kxh7 57.Qh5+ and 58.Qxe8 + -) 57.Qf6 Rg7 (57... g4 58.Qg6+ wins a rook) 58.Rd8 Rxd8 (58... Rge7 59.Qxe7 + -) 59.Qxd8+

B.1.a) 59... Kh7 60.Qxc8 g4 61.Qxe6 g3 62.Qh3+ Kg8 63.Qg2 and White wins by creating a passed pawn on the queenside.

B.1.b) 59... Kf7 60.Qxc8 g4 61.Qxa6 g3 62.Qb7+ followed to 63.Qg2 with a similar plan as in B.1.a and the white king blocking Black's e-pawn.

B.2) 54... h5 55.Rxh5 with an extra pawn and a winning attack by piling up the heavy pieces on the h-file.

C) 52... Qf6 53.Rdh2

C.1) 53... Kxg7 54.Rxh6 Qxh6 55.Rxh6 Kxh6 56.Qg4 and mate soon.

C.2) 53... Qxg7 54.Rxh6 with a winning attack (55.Rg6, 55.Qh5, etc.).

C.3) 53... Bxa3 54.Rxh6 again looks winning.

D) 52... Qf7 53.Rxh6, with threats like 54.Rh8+ Kxg7 55.Rg2+ Kxh8 56.Qh3+ Bh4 57.Qxh4+ Qh7 58.Bxh7 Rxh7 59.Qf6+ Rg7 60.Qxg7#, looks winning.

Oct-03-14  morfishine: Although I think I've seen this before, I had a very difficult time figuring out Black's best moves. For example

Referrencing <51.Nxh6> 51...gxh6 the strongest continuation is <52.g7>, but Black has a number of choices

*****

Oct-03-14  Ratt Boy: Relatively easy for a Friday. I'm surprised Black didn't play 53...♗g5. That seems to offer way better resistance than just allowing ♖xg7.
Oct-03-14  David2009: Svidler vs A Korotylev, 2004 [why not 59...exf5] - <newzild: Instead of 60. Bxf5? White has 60. Qg3!> Spot on, thanks!
Oct-03-14  Cheapo by the Dozen: I think we all saw the general idea, but I didn't see how to punch through after ... Bg5. I frankly also didn't see how to punch through in lines that gave Black 2 bishops and rook for the queen, as in the game or in lines that feature ... Kxg7 and have a grand exchange at g6.
Oct-03-14  JohnBoy: <newzild> - I was about to post that I thought 59.f5 was a clever trick when I saw your post above. I'm glad someone else liked it too.
Oct-03-14  Castleinthesky: I'll give myself credit as I saw the knight sac followed by the possible pin. I tried to play out other possibilities, such as Qf3 instead of Qg3 but came up with the same favorable exchange for white.
Oct-03-14
Premium Chessgames Member
  kevin86: White bursts through with an aggressive attack.

The material is even at the end, but black's game is so vunerable, that it will collapse (like a Kevin Spacey Show)-houseofcards.

Oct-03-14  Gato: Computer gives 59 Rxg7 with an enormous advantage; if 59 ... Kxg7 then one of the two black rooks will be captured after many checks.
Oct-03-14
Premium Chessgames Member
  al wazir: <dfcx: 51.Nxh6+ gxh6 52.g7!

A) 52...Qxg7 53. Rg2 Bg5 54. fxg5 followed by 55.g6

B) 52...Qf7 53. Rxh6 and black is worse than A)>

53...Bf6. Now what?

Oct-03-14  rickycota: I prefer 52.Rdh2
Oct-03-14
Premium Chessgames Member
  Longview: I agree with (An Englishman: Good Evening: Had to see the second move to claim full credit.) I did not see the g pawn advance to setup the pinning of the Queen to the king and subsequent Rxh6. Very nice. Winning material and staying in grip of things when down material. Svidler did his best kind of work here.
Oct-03-14
Premium Chessgames Member
  Longview: I agree with (An Englishman: Good Evening: Had to see the second move to claim full credit.) I did not see the g pawn advance to setup the pinning of the Queen to the king and subsequent Rxh6. Very nice. Winning material and staying in grip of things when sacrificing material is an invigorating attacking style. Svidler did his best kind of work here.
Oct-03-14
Premium Chessgames Member
  patzer2: My two candidates for this difficult Friday puzzle were 51. f5 and 51. Rdh2 + -.

<51. Nxh6+!!> My choices are not as strong as this demolition sacrifice, which gives Black no time to put up tougher resistance with ....Bf6 or ...Bg5.

<51...gxh6> Forced as the alternative is 51. Kh8 Nf7+ 52. Kg8 Rh8#.

<52. g7> Follows-up the demolition with a pawn clearance sacrifice, which continues the process of ripping open the Kingside before Black can defend with ...Bf6 or ...Bg5.

<52....Qxg7> Others lose quicker, as for example with 52... Kxg7 53. Rxh6! Kxh6 54. Qg4! Qf5 (54... Qf6 55. Rh2+ Qh4 56. Qg6#) 55. Rh2+ Bh4 56. Rxh4+ Qh5 57. Rxh5#.

Also failing is 52... Qf7 53. Rxh6 Kxg7 54. Qg4+ Kxh6 55. Rh2+ Bh4 56. Qg5#.

Now White wins easy with <53.Rg2 Bf6 54. Rxh6 Kf8 55. Rxg7 55...Bxg7 56. Rh1 Rd8 57. Qe3 Rd6 58. Rg1 Bd7 59. f5 Be8 60. f6 Bxf6 61. Qh6+ Ke7 62. Rg8 1-0>.

Oct-03-14
Premium Chessgames Member
  patzer2: My first choice 51. f5!? wins after 51...exf5? 52. Bd5+ Kh8 53. Nxh6+! gxh6 54. Rg2! Bf6 55. Qf4 .

The problem is 51. f5!? Bg5! 52. f62! puts up much resistance and is not a clear win.

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