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Sergey Dolmatov vs Lev Polugaevsky
Chigorin Memorial (1988), Sochi URS, Sep-??
Sicilian Defense: Scheveningen. Classical Variation (B84)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
Aug-28-04  Whitehat1963: Puzzle: White to play and win after 28...Ne7.
Jul-28-18  tessathedog: Nice kingside attack from Dolmatov, showing he was more than just a master of endgames. An early provocation of a weakness (18 Ng5!)which proves vital when the decisive combination (29 Nxg6!) is launched a dozen moves later. The final move is also aesthetically pleasing.
Jul-29-18  ChessHigherCat: <tessathedog> 35. Rf7 was impressive but overall, the game was far too canine!
Apr-29-20  MarianoFreyre: amazing game, the kngiht goes from g1 to f3 to d4 to f3 to g5 to f3 to d4 to f3 to h4 and to g6 sacrificing it.
Oct-18-20  Walter Glattke: Variation check system of 1990 says: 35 possible moves, III (lost) 9, move 03, 07, 18, 19, 26, 27, 29, 31, 32 (29.b4 Nd5 Rg4 Rg5Qg4 Qxf5 Bc5 Bxb6) I correct move 6 29.exf5 rest II (lose advantage) 25 moves. So the system.
Oct-18-20
Premium Chessgames Member
  al wazir: What happens after 30...exf5 ? If 31. Qh5, then 31...Qf7 32. Rh3 Qf8. Now I'm stuck.

Does white have a better continuation?

Oct-18-20  Walter Glattke: 30.-ef5!? I think 31.Qxf5 Kg8 32.Rxg6 not interesting. After 30.-Ng8 one must get the both f-pawns off to win. The grandmasters find out, that move no 14, 29.Nxg6 is correct, too.
Oct-18-20  Walter Glattke: No, 32.Qxg6 or RxB3
Oct-18-20  stacase: Move 34 take the Bishop 34.fxg7 or bring the Knight to the party 34.Ne4. I went with the Knight. Except for that, it nearly played itself. Considering that I got the first five moves, I wouldn't rate it "Insane".
Oct-18-20  7he5haman: Saw everything except for the final move.

I did wonder whether 30...Nh8 was a tougher defence, allowing the Bishop to defend h6 from f8. Example line:

31. f6 Bf8 32. f5 Qf7 33. Rf4 Qxf6 34. fxe6 Qxe6 and Black is still holding on as far as I can tell.

Oct-18-20  Brenin: If 30 ... exf5 then 31 Qxf5 wins the N on g6, and leaves White 2P ahead with a continuing attack. The moves 30 ... Nf8 (as played) or Ne7 look better. Earlier, 25 ... f5 looks unwise, weakening the K-side further; 25 ... d5 might have been better and more thematic.
Oct-18-20  Walter Glattke: I did not calculate with 31.f6! here in the errly morning so I present a variation for 29.exf5: 29.-exf5 30.Nxg6 Nxg6 31.Qxf5 or 29.-Nxf5 30.Nxf5 exf5 31.Rc1 strikes at the other wing then.
Oct-18-20
Premium Chessgames Member
  chrisowen: Numbers up vintqua nxg6 hubbubs achtung mouthin boffons teflons vintqua ninebar vintqua numbers up vintqua jasthas bumpnar randoms forlorn mariner ladpaws vanquish vintqua quickja ketchup cuffys goyavid its jawsvow vastquav kisslap thinitz rumcode nxg6 hubbubs achtung mouthin boffons teflons vintqua d5 foodqua against vintqua aquaman trident kongvid vintqua dubover duffqua 0 1 it ok vowumum vimumum ne7 gavequa acequav methods dubover eggshead 2 3 it ok vowumum vimumum nxg6 apathys gaffjav gutfave gutfash flungan vulcans umsumum givequa jitterbug vintqua cinchon oddquav numbers up inithag nxg6 earquav?
Oct-18-20  mel gibson: The first ply was simple.

Stockfish 12 says:

29. Nxg6

(29. Nxg6 (♘h4xg6 ♗g7xc3 ♘g6xe7 ♕c7xe7
b2xc3 ♕e7-f7 ♖f1-b1 ♗b7-a8 ♗e3-d4 ♖d8-d7 ♖g3-g5 f5xe4 ♖g5-h5 ♕f7-f8 f4-f5 ♖d7-f7 ♖b1-f1 e4-e3 ♗d4xe3 ♖f7-f6 ♔h1-g1 e6xf5 ♖h5xf5 ♗a8xg2 ♖f5xf6 ♗g2xh3 ♖f6xf8 ♗h3xf1 ♖f8xe8 ♗f1xd3 ♔g1-f2 ♗d3-c2 ♖e8-e6 ♗c2xa4 ♗e3xh6 ♗a4-b5 ♖e6xd6) +4.48/33 113)

score for White +4.48 depth 33.

Oct-18-20  eaglewing: <7he5haman:> I thought about 30. ... Nh8, too. Still 30. ... Nh8 31. f6 Bf8 32. f5 Qf7 33. Bxh6 Bxh6 34. fe Rxe6 35. Rg7+ Qxg7 36. fg with the next move probably fhQ+, if the rook on e6 is secured, looks decisive. However, I did not check this line with calculation support.
Oct-18-20
Premium Chessgames Member
  sbevan: 35.♖f7.

Is a beautiful move.

Oct-18-20  Brenin: <7he5haman>, <eaglewing>: After 29 Nxg6 Nxg6 30 exf5 Nh8 White can play 31 fxe6 rather than 31 f6, with the threat of 32 Qf5+ Kg8 33 Bd4. He has 3P for a minor piece, and a strong attack, e.g. 33 ... Rf8 34 f5 Qe7 35 Rf4, followed by Rg4 or Rh4.
Oct-18-20
Premium Chessgames Member
  agb2002: White has a bishop and a knight for the bishop pair.

The first idea that comes to mind is 29.Nxg6:

A) 29... Nxg6 30.exf5

A.1) 30... exf5 31.Qxf5 recovers the piece while keeping the attack and an extra pawn.

A.2) 30... Nf8 31.fxe6

A.2.a) 31... Nxe6 32.f5 Nc5 (32... Nf8 33.f6 seems to win; 32... Nd4 33.f6 Bf8 34.Bxd4 looks winning) 33.f6 Bf8 34.Qf5+ Kh8 35.f7 is winning.

A.2.b) 31... Rxe6 32.f5 Rf6 33.Bd4 recovers some material and keeps the attack (33... Rf7 34.f6 Bh8? 35.Qf5+ Ng6 36.Qxg6#).

A.3) 30... Ne7(h8) 31.fxe6 restores the material balance while keeping the attack.

B) 29... fxe4 30.Nxe7 (30.Qxe6 Nd5 31.Qf5? Nxe3 32.Nf8+ Kg8) followed by dxe4, wins a pawn (Bxc3 looks risky).

Oct-18-20  ajax333221: It is so easy to understand how every following move is going to be, but it was very hard to have the creativity and vision for the first nail in the coffin.
Oct-18-20
Premium Chessgames Member
  Breunor: Black is even through move 25 - Stockfish doesn't like the f5 maneuver. Instead, it recommends d5:

1) -0.04 (21 ply) 25...d5 26.e5 Bc8 27.Qh5 Bc5 28.Nce2 Rf8 29.Rc1 Qd7 30.g4 Rde8 31.b3 Bb7 32.Qh3 f6 33.f5 fxe5 34.fxe6 Qe7 35.Nf5 Qxe6 36.Bxc5 bxc5

After 25 ... f5

1) +1.37 (19 ply) 26.g4 fxe4 27.Nxe4 Qd7 28.f5 exf5 29.gxf5 Rxe4 30.dxe4 Bxe4 31.Ne6 Re8 32.Ng5+ Kh8 33.Nxe4 Rxe4 34.f6 Qxh3 35.Rxh3 Nxf6 36.Bxh6 Be7 37.Bg5+ Kg8

Of course if black shouldn't play f5, it also shouldn't play 24 Ng8. An immediate d5 was better.

1) -0.14 (18 ply) 24...d5 25.e5 Nd7 26.Rc1 Nc5 27.Bd2 Qd7 28.Rg3 g6 29.b3 Rc8 30.Kg1 Qd8 31.Rf3 Nd7 32.Rff1 Bc5 33.Be3 h5 34.g4 Bb4 35.gxh5

Oct-18-20
Premium Chessgames Member
  Honza Cervenka: I love these three hammer blows: 31.f6!, 32.f5! and 33.f6! once again.
Oct-18-20
Premium Chessgames Member
  eternaloptimist: This is a really good combination by GM Dolmatov! He did a good job of opening up the f-file & the c1 -> h6 diagonal. IM Dvoretsky was 1 of the main reasons that Dolmatov became such a strong player. He trained him for years. <Honza> I like those moves also!
Oct-18-20
Premium Chessgames Member
  al wazir: <Brenin: If 30 ... exf5 then 31 Qxf5 wins the N on g6, and leaves White 2P ahead with a continuing attack.>

Of course. Thanks.

Oct-18-20
Premium Chessgames Member
  PawnSac: < Brenin: The moves 30 ... Nf8 (as played) or Ne7 look better. Earlier, 25 ... f5 looks unwise, weakening the K-side further; 25 ... d5 might have been better and more thematic. >

yes agreed. But black's motivation is understandable. He was feeling the pressure of white's threatened f5 push. There are two preferable candidate moves.

After 25.Rdf1


click for larger view

As you mentioned, < 25...d5 > is the typical Sicilian center break, after which i would play 26.e5 to keep the light squared bishop diagonal closed then continue preparing the f5 push.

The other option is < 25...Qd7 > to support the f5 square, although white can still play 26.f5 e5 (inadvisable is ..exf5?! 26.Nxf5 opening the F file for white's rooks, as well as bring the N closer to his king)

So after 25...Qd7 26.f5 e5 white now has an interesting temporary piece sac 27.Ne6!?


click for larger view

This pretty much forces fxe6 28. fxe6 Rxe6 29. Rxf8 Rf6 30. R1xf6 Nxf6 31. Qxd7 Rxd7 32. Bxb6


click for larger view

and we see that white has won a pawn, but after the continuation..

..d5 33. exd5 Nxd5 34. Nxd5 Rxd5 35. Rd8 Rxd8 36. Bxd8 Kg6 37. Kg1 Kf5 38. Kf2 h5 39. a5 g6 40. Bb6


click for larger view

..it is pretty clear that after white pushes d4 and trades center pawns, the position is going nowhere. He may be up a pawn, but with the pawns and bishops on opposite colors it's a draw.

Oct-18-20  devere: Best defense seems to be 30...Nh4 31. Qxh4
exf5 32. Qh5 Qd7 33. Qg6+ Kh8 34. Bxb6
Rc8 . White is two pawns up and should win, but Black can make him earn it.

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