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Shakhriyar Mamedyarov vs Ivan Sokolov
Essent Tournament (2006), Hoogeveen NED, rd 6, Oct-28
Slav Defense: General (D10)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 3 ·  Later Kibitzing>
Oct-28-06  crwynn: <mang00neg: <CRWynn> as much as I trust your analysis, when i played Kxf4, CM8000 played Kc4 and won by capturing on f7 and pushing the E pawn home.>

All right, but 52.h5 looks like a much simpler win. Is there some refutation of it I'm not seeing? It looks very simple - White queens.

Oct-28-06  crwynn: 51...Ke4 52.h5, that is
Oct-28-06
Premium Chessgames Member
  Gypsy: Yup, the breakthrough works.
Oct-28-06  mang00neg: either way white wins. black could only pick his posion.
Oct-28-06  mang00neg: oh and the computer picks the King march because in those lines after queening, black is only left with 2 pawns compared to 3 pawns in the break-through line. so technically the king march "scores better" according to CM which is why it is the computer's choice. (even tho it is irrelevant)
Oct-28-06  crwynn: <mang00neg: oh and the computer picks the King march because in those lines after queening, black is only left with 2 pawns compared to 3 pawns in the break-through line. so technically the king march "scores better" according to CM which is why it is the computer's choice. (even tho it is irrelevant)>

Yes, I suspected that was why...the computer doesn't like to sacrifice pawns even to get a queen! Good to know I wasn't hallucinating then, especially since 52.h5 looked so aesthetic.

Oct-28-06
Premium Chessgames Member
  tpstar: After 51. g5:


click for larger view

If 51 ... Ke4 then White has two winning methods:

1) The End-Around by <Peligroso Patzer> = 52. Kc4 Kxf4 53. Kd5 Kany 54. Kd6 and if the Black King minds the Pe5, the White King eats all 3 Black Pawns.

2) The Breakthrough by <CRWynn> = 52. h5! gxh5 (52 ... Kxf4/Kf5 53. h6) 53. g6 fxg6 54. e6 and White Queens first.

<lostemperor> Shak Diesel.

Oct-28-06  ahmadov: Congratulations to Shak for this difficult and beautiful! When following this game I never lost my trust in Shak even in equal positions in the middle game and endgame. Thanks to you, Mamed, for not letting me down!
Oct-28-06  ahmadov: Ooops, <difficult and beautiful game>
Oct-28-06  Ulhumbrus: Instead of 9...0-0 9...dxe4 reaches a position akin to the Caro-Kann. Instead of 13 Re1, 13 f4! prepares a strong attack. After 37 f4, Black's K is behind in development. 37...Kf8 begins to develop the Black K On 43 Kd5 White is playing a King ahead. It was a fatal mistake on Black's part to allow the White King to get so far ahead of Black's King in development in the ending.
Oct-29-06  piteira8: How can Shak win if Ivan plays 52. ... Kf5?
Oct-29-06  Mameluk: Good analysis on chessninja´s daily dirt from some reader, showing that 53... Ke6 was a draw. I was also unable to find white´s win yesterday, but that was just quick analysis. However it strikes me that this is the only analysis I have seen, because the pawn endgame is important and not dificult. And official site even says it was lost. How bad in Internet age.
Oct-29-06  percyblakeney: 49. f5 was winning, for example

<49. f5 gxf5 50. gxf5 b3 51. Kc3 b2 52. Kxb2 Kd5 53. e6 fxe6 (Kd6 54. f6 gxf6) 54. f6 gxf6>

and white to move will soon have a queen:


click for larger view

Oct-29-06  Mameluk: <percy> Yes, that is another thing. So the whole endgame was not really Crown group level, but while Shak´s single ´blunder´ is quite normal, Sokolov was clearly broken man after his 0,5/5 start. Maybe we are waiting for chessbase report, because they are analysing the pawn endgame:)
Oct-29-06
Premium Chessgames Member
  lostemperor: At the post-mortem analysis they think that 34 ... Bxa3 might have won.
Oct-29-06  slomarko: i dont understand how did sokolov manage to play the ending so badly. 34...Ba3 is clearly much better for black. and later after 37.f4 he should have played g5 with better position.
Oct-29-06  acirce: Yes, 53..Ke6 (or other moves) is a draw or engines would find a win, and they don't. That's the easy answer. Of course "how" is more tricky, but at least it seems fairly straightforward. Let's see.

53..Ke6 54.Kc5 Ke7 55.Kd4


click for larger view

Now 55..Kd7?? 56.f5! gxf5 57.h5! Ke8 58.h6 gxh6 59.gxh6 Kf8 60.Ke3 and 55..Ke6?? 56.f5+! Kxf5 57.Kd5 Kg4 57.Kd6 Kxh4 58.Ke7 Kxg5 59.Kxf7 so the slightly surprising 55..Ke8 or 55..Kf8 is forced, maybe this was where Sokolov was confused, if not later.

Then if 55..Ke8 56.f5!? gxf5 57.h5 g6 58.h6 Kf8


click for larger view

both sides have to keep the other side's passer under control, draw. (In the 55..Kd7?? line Black didn't have time for ..g6 meaning that White could just go and capture the f5-pawn.)

White attempting a breakthrough on the kingside is also fruitless: 55..Ke8 56.Ke4 Ke7! 57.Kf3 Ke6 58.Kg4 Ke7

59.h5 gxh5+! 60.Kxh5 Ke6! 61.Kg4 (61.g6 f6!) g6! and then after returning: 62.Kf3 Kf5 63.Ke3 Ke6 64.Ke4 Ke7! (now 64..Kd7??

65.Kd5 ) 65.Kd5 Kd7= or 65.f5 gxf5+ 66.Kxf5 Ke8!


click for larger view

Perhaps surprisingly (?) this is still a draw. White can't break through on either side: 67.Ke4 Ke7 68.Kd5 Kd7,

67.Kg4 Ke7, 67.e6 Ke7/Kf8! and only then 68..fxe6, etc.

If 66..Kf8?? the win had been 67.Kf6 Kg8 68.Ke7 Kg7 69.Ke8! Kg8 70.g6! fxg6 71.e6 (similar after 67..Ke8).

Oct-29-06
Premium Chessgames Member
  Honza Cervenka: Poor Ivan. To destroy such a good game in such a terrible way....:-(
Oct-29-06
Premium Chessgames Member
  Honza Cervenka: <At the post-mortem analysis they think that 34 ... Bxa3 might have won.> 34...Bxa3 35.Nxd5 looks pretty bad for white despite of active Knight.
Oct-29-06  Kingdom NL: and an A or H pawn is one of the biggest enemies for a knight in endgames. Knights work only close distance. So simple 34...Bxa3 is a logical move.
Oct-29-06  Mameluk: And chessbase claims after 53.Kb5 the game is basically over. That site is a shame for modern developed state as Germany!!!
Oct-29-06  Hesam7: Interesting pawn endgame. The point is that the following position with White to move is a draw:


click for larger view

I have not proved this but with this in hand one can make some comments:

<46. Kxd4> Now 46... Ke6! draws since he can reach the above position. <46... Kc6?> This is a blunder that loses: <47. h4 b4 48. axb4 axb4 49. Kc4?> Mamedyarov returns the favor and the position is equal again. 49. f5! would have won. Note that 46... Ke6! would have eliminated this possibility. <49... b3 50. Kxb3 Kd5 51. g5 Ke6 52. Kc4 Ke7 53. Kb5 f6?> Sokolov makes the final mistake 53... Ke6! would have saved the game. This time Mamedyarov converts the advantage: <54. gxf6+ gxf6 55. Kc5 Ke6 56. Kd4 Kd7 57. Kd5 Ke7 58. e6 Kd8 59. Kd6 Ke8 60. e7 [1-0]>

Oct-30-06  ismet: 51. move Sokolov blunder ?

How about Ke4 ?

Oct-30-06  Manic: <ismet> 51...Ke4 was discussed above. It's a loss for black.
Oct-31-06  mang00neg: The analysis of this king and pawn endgame by IM ken regan on Susan's blog is really intense.
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