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Sergey Dolmatov vs Aidyn Guseinov
? (1988)
Sicilian Defense: Old Sicilian. Open (B32)  ·  1-0
ANALYSIS [x]

FEN COPIED

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Kibitzer's Corner
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Nov-28-08  Woody Wood Pusher: 37.Rxg5 is clearly easily winning for white.

A simple week so far...

Nov-28-08
Premium Chessgames Member
  johnlspouge: Friday (Difficult):

Dolmatov vs A Guseinov, 1988 (37.?)

White to play and win.

Material: 2B for 2N+P. The Black Kh8 has 2 legal moves, both light squares. The White Bd4 is on the same diagonal as Kh8, obscured by the White Re5 and the Black Rf6 and Pg7. The White Qa5 has an invasion point d8, with check. The Black Rc2 is loose, and on the same diagonal as h7, one of the flight squares for Kh8, and the White Bf8 has access to d3, on the diagonal. The White Rb1 and Qa5 require activation. The candidate move is greatly restricted, because it must foil a mate threat:

37Rxf1+ 38.Rxf1 Nh3+ 39.Kh1 Qxf1+ 40.Bg1 Qxg1#

Candidates (37.): Qd8+, Rxg5

37.Rxg5 hxg5 [else, drop a N] 38.Qd8+

(1) 38Qf8 39.Bxf6 Qxd8 [Kg8 40.Qxf8+ wins a N] [else, drop Qf8]

40.Bxd8

White has won a N with a rubber band, Qd8 and Bf6.

(2) 38Ne8 39.Bxf6

(2.1) 39Qxf6 40.Qxe8+ Kh7 41.Bd3+ then 42.Bxc2

White has R+B for P.

(2.2) 39gxf6 40.Re1

White wins Ne8 and then hunts Kh8 with Q+R against Q, with Bf1 to join the party later.

Nov-28-08  eaglewing: <dzechiel;agb2002:> It seems to me, the Ne8 variant is not that easy, there might be swindling chances, if instead of 38. Qd8+ Ne8 39.Bxf6 gxf6 40.Re1 Black would play:

38. Qd8+ Ne8 39.Bxf6 Qh5 40.h3 (or h4?) Qf3 41. Qxe8+ Kh7

It seems White needs to return one bishop immediately: 1) Bd3 Qxd3 Qh5+ Kg8 Qxg5 needs to prove escape from the checks after Rg2+ or 2) Qe1 gxf6 and White is still under pressure. Black would go for eliminating queenside pawns and hopes to draw against bishop and h-pawn.

Did I overlook something, what fast and clearly busts this? Variant 1 with h4 could be it.

Nov-28-08
Premium Chessgames Member
  johnlspouge: < <agb2002> wrote: Black is threatening mate in two (37... Nf3+ 38.Kh1 Rxh2#). >

...and I was so proud of seeing the mate-in-four immediately :)

There was no doubt that the Ng5 needed to be eliminated ;>)

Nov-28-08
Premium Chessgames Member
  johnlspouge: I cannot say I found today's puzzle particularly easy. I spent a lot of time on 37.Qd8+ until I realized that clearing Re5 with 37.Rxg5 was a useful preamble.
Nov-28-08  Nostrils: 27 ... e3 looks stronger for black the more I look at it.

28 Bxe3 Nxg3+
29 hxg3+ ( 29 Kg1 is perhaps whites best option)
29 ... Qh3+
30 Kg1 Qxg3+
31 kh1
(31 Kf1 Nxf3, threatens Nh2# 32 Bxf3 Rxf3+, 33 Ke2 Re8 )

31 ... Qh3+
32 Kg1 Nxf3+
33 Bxf3 Rxf3
and I don't think white has a defence to Qg4.
Need to check with an engine.

Nov-28-08
Premium Chessgames Member
  Once: <johnlspouge: I cannot say I found today's puzzle particularly easy. >

Thank you, thank you, thank you! And I thought it was just me struggling with this one, while everyone else was saying how easy it was ...

Nov-28-08  Patriot: I didn't find this one easy even though Rxg5 was my first instinct. This temporarily loses the exchange but Bxf6 at least wins the exchange back. One of the keys here is the loose rook on c2 which allows variation C to work.

37.Rxg5 hxg5 38.Qd8+

A) 38...Qf8 39.Bxf6 wins a piece

B) 38...Ne8 39.Bxf6 gxf6 40.Re1 wins

C) 38...Kh7 39.Bxf6 Qxf6 40.Qxf6 gxf6 41.Bd3+ wins

Nov-28-08  sfm: Oops! Here black has gained a crushing position and then he plays 36.-,Ng5??, absolutely forcing the response, which even wins. Among a handful of winning moves I'd (probably,hopefully) have played 36.-,Rf-f2 with the nice threat of 37.-,Qf3 with the nice threat of 38.-,Rxf1+. Anything faster? Ach, such is the sweet taste of victory, treacherous and illusive. Who hasn't had bitter losses like this?
Nov-28-08
Premium Chessgames Member
  YouRang: I think I have proof that turkey hinders one's chess analysis skills. :-(
Nov-28-08
Premium Chessgames Member
  kevin86: The finish is like checkers in how the black squares are employed. A nice finish...
Nov-28-08  JG27Pyth: my inability to solve this problem has plunged me into a crisis of self-doubt and despair...

I saw very quickly Black's combination to mate and after thoroughly investigating decided on Rxg5 as White's best move... but why? WHY? was it so hard for me to see that Qd8+ first, prior to Bxf6 allows white to keep a piece... it seems so very basic... yet it completely eluded me.

*door shutting*

... now go -- all of you -- go, leave me alone...

Nov-28-08
Premium Chessgames Member
  Jimfromprovidence: Not so fast guys, this puzzle is very tricky. Check out 37b6! as a great defense for black.


click for larger view

Now, if 38 Qxb6, hxg5.

Now, the text 39 Qd8+ does not work!

Continuing...39Ne8 40 Bxf6 gxf6 41 Re1 Qa7+! 42 Kh1 Rxh2+! 43 Kxh2 Qf2+, winning the rook and protecting the knight.


click for larger view

The key is that the pawn move b6 gives the queen access to the checking square a7, saving blacks game.

Nov-28-08  tallinn: Fritz found an interesting better defense against Rxg5:

Rxg5 b6!?


click for larger view

(The reason for this move is seen in the following line: Qxb6 hxg Qd8+ Ne8 Bxf6 gxf Re1 Qa7+ Kh1 Rxh2+! Kxh2 Qf2+ Bg2 Qxe1 Qxd5 almost equal)

Now, what to do? First idea is to keep the material:

Qa4 Rd2 Re5 (Bxf6 Qxf6 Qf4 Qxg5 does not keep the material)


click for larger view

Now black has a nice trick to get a draw. My guess is that only a computer can see the equalizing move here. I give the move two exclamation marks.

Maybe there are even more wonders to find in the position with a computer as the line Rxg5 b6 Qa4 Rd2 may be improved with Rg4 Qe6 Qb4 Nc4 b3 a5 Qc3 Rxf1+! Rxf1 Qxg4 Bf2 and now it looks like white gets the piece for two passed pawns: Rxa2 bxc4 dxc4 Bxb6 and black can still fight.

Nov-28-08  tallinn: Jim, looks like we wrote at the same time :-)
Nov-28-08  A.G. Argent: <JG27Pyth> Wait, wait, before you go, I just wanted to tell you that the other day I caught you slumming at one of the "other" chess sites, shan't announce which one but, of course, you know of which I speak. Enjoy your games and posts there. That's all. Now go deal with your crisis. I'm shutting the door as well but my withdrawal from the world is due to yesterday's excess.
Nov-28-08  JG27Pyth: <Wait, wait, before you go, I just wanted to tell you that the other day I caught you slumming at one of the "other" chess sites, shan't announce which one but, of course, you know of which I speak.> Yes, one gets a nice ego-boost helping novices and just in general not being the weakest chess mind in the vicinity (and correspondence chess is a revelation to me... I enjoy having book/database for openings...) then it's back here... for the humbling :(
Nov-28-08
Premium Chessgames Member
  Jimfromprovidence: <tallinn> <Jim, looks like we wrote at the same time :-)>

I found it really interesting to contrast the two positions. Here's the text position after 38 Qd8+.


click for larger view

Now, here's the alternative after 37...b6! 38 Qxb6 hxg5 39 Qd8+.


click for larger view

The position is identical except for that sacrificed b pawn, which amazingly allows black to survive.

Nov-28-08  TheWizardfromHarlem: zenchess you cant say Ng5 is a blunder because the RxN is a "difficult" move to spot. Ng5 also comes with its own mate threats..if white cant come up with a move strong enough to prevent black from playing Nf3+ the game is over for white. Therefore the move RxN was more of a neccessary defensive move if anything it was the only move in the position.
Nov-28-08  njchess: I got this one once I concluded that the immediate Qd8+ did not work. Rxg5 became necessary then Qd8+ followed Bxf6. 36. ... Ng5 was not the strongest move, though it took accurate play by White to prove it.

Frankly, I still have problems with Black's 13th and 14th move. Its a little early to be playing waiting moves, much less hoping for a draw.

37. ... b6 is an ingenious defense, though I think White retains an edge after 38. Qxb6 hxg5 39. Bxf6 Qxf6 40. Bd3 given his pawn structure.

Nov-28-08
Premium Chessgames Member
  dzechiel: <newzild: And now Dzechiel gives 40 Qxd6, but white can play 40.Qxf6+ first, then 41.Qxd6.

In this line, white is up a bishop AND a pawn.>

The problem here is that after 40 Qxf6+ Qg7 41 Qxd6 black can now play 41...Qd4+ which leads to a draw after 42 Kh1 Qe4+ etc.

Nov-28-08  Civhai: 37. Rxg5 hxg5 38. Qd8+

38. ... Kh7 39. Bd3 forks the rook

38. ... Qf8 Bxf6 and black cannot take back because his queen is hanging and he cannot take with the queen because she is pinned. If she exchanges, the bishoph goes away, so he can't take back either.

38. ... Qe8 39. Bxf6 almost the same as Qf8, but now it is the knight wich is hanging, so taking back the bishop would only be an exchange. Taking the queen would save the bishop again.

I think this is not very difficult, because I saw it after a few moments and I've got 1200 ELO. Did I miss something or why is it called "difficult"?

Nov-28-08  crwynn: You missed the line 37.Rg5 hg 38.Qd8 Ne8 39.Bf6 gf which stopped me awhile, but then I saw 40.Re1
Dec-04-08
Premium Chessgames Member
  patzer2: For the Friday Nov 28, 2008 puzzle solution, Black apparently has a clever defensive combination to save his game after 36...Ng5! 37. Rxg5 b6!!

See comments by <Jimfromprovidence> and <tallinn> for details.

Dec-04-08
Premium Chessgames Member
  patzer2: Of course in the game continuation, after the puzzle solution 37. Rxg5!? and the expected 37...hxg5, White removes the guard and wins a piece with the in-between deflection move 38. Qd8+!
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