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Semen I Dvoirys vs Gennadi Timoshchenko
URS-ch otbor56 (1988), Barnaul URS, Aug-??
Spanish Game: Closed Variations. Flohr System (C92)  ·  1-0

ANALYSIS [x]

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Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Jul-26-20
Premium Chessgames Member
  al wazir: <Steve.Patzer: 35. Qg5 is quicker.> So is 35. Qe4, with the double threat of 36. Qh4# and 36. Qxc2.
Jul-26-20
Premium Chessgames Member
  An Englishman: Good Evening: 5/6 with one known (Saturday). This Sunday proved more frustrating than normal because of my belief that I had solved it with 29.Nxh6+. Had to spend some time to figure out my mistake, but eventually realized that the text move is mandatory so that White can fork King and Rook with Qg3+ in some variations.
Jul-26-20
Premium Chessgames Member
  Predrag3141: On move 29, Nxh6+ was in the air and I went for it. But Qf3, as played, was far stronger. It brings the strongest piece into the attack and amplifies the threat of Nxh6 since Qg3 is now possible. Better still, 29 Qf3 threatens to trap the queen with Re4.

Black's best defense may be 29 ... Rd8, preventing both the fork of g8 and b8, and saving the queen from being trapped. But Stockfish still finds a use for Nxh6+:

29 Qf3 Rd8 30.Re4 Qxd5 31 Nxh6+ gxh6 32 Rg4+ Kh7 33 Qf6 Bf8 34 Qxa6. Playing the king to f8 after 32 Rg4+ is not much better. In that line, the king ends up under fire in the center of the board.

Jul-26-20
Premium Chessgames Member
  Predrag3141: <Steve.Patzer: 35. Qg5 is quicker.>

<al wazir: So is 35. Qe4, with the double threat of 36. Qh4# and 36. Qxc2.>

35 Qe4 is tempting but does force mate directly. 35 Qg5 and Qe5 both force mate after Ne2-g3 and spite checks stave it off a few moves. Very pretty!

Jul-26-20
Premium Chessgames Member
  sophiephilo: I thought its 28. Kt H6+ too.
Jul-26-20  Walter Glattke: I saw 29.Nxh6, possibly gxh6 30.Rg3+ Kf8 31.Bxh6+ Ke7 32.Qe2+ Kd7 33.Re3, but no perfect continuation.
Jul-26-20  Walter Glattke: Instead of 31.Nf5 white could play 31.Qh5, but 31.-Qxe3 32.fxe3 Bxe3+ 33.Kh1 Bxh6 little advantage for black, I think.
Jul-26-20  Walter Glattke: Or double check with 32.Nxf7++ Kg8 33.fxe3, good idea, or not!? E.g. 33.-Bxe3+ 34.Kh2 Rxb2 35.Bg6
Jul-26-20
Premium Chessgames Member
  agb2002: White is a pawn up.

Black threatens Qxd5, Nxb2 and Nxc1.

An interesting move is 29.Nxh6+ but I'm unable to find a winning path either after 29... gxh6 30.Rg3+ Kf8 (30... Kh8 31.Be3 Qxd5 32.Qg4) 31.Bxh6+ Ke8 or 29... Kf8 30.Nf5 Qxd5 31.Qh5 f6.

Another option is 29.Qf3, preparing Nxh6+ and trying to take advantage of the defenseless black rook but Black has Rd8, with the double threat Nxc1 and Qxd5.

I don't know. However, 29.Qf3 looks more promising than 29.Nxh6+.

Jul-26-20
Premium Chessgames Member
  thegoodanarchist: I am somewhat encouraged in finding the right squares for the pieces (h6 for the knight, Queen on f3), but I didn't find the correct move order.

Didn't want to sac the bishop, but it works.

Also, the puzzle solver needs to foresee that gxNh6 fails because of the threat of Qg3, and black's rook will fall with check.

Jul-26-20  mel gibson: I thought 29. Nxh6 but I was wrong.
Stockfish 11 calls that a draw.

Stockfish 11 agrees with only the first ply:

29. Qf3

(29. Qf3 (♕d1-f3 ♖b8-d8 ♖e3-e4 ♕d4xd5
♘g4xh6+ g7xh6 ♖e4-g4+ ♔g8-f8 ♗c1xh6+ ♔f8-e7 ♗h6-g5+ ♔e7-d6 ♗g5xd8 ♕d5xf3 g2xf3 ♘d3xf2 ♖g4-h4 ♔d6-d7 ♗d8-a5 ♘f2xh3+ ♔g1-g2 ♘h3-g5 ♗a5-d2 ♘g5-e6 ♗c2-e4 ♗c5-d6 ♖h4-h7 ♔d7-e8 ♔g2-f2 ♔e8-e7 ♗e4-g6 ♘e6-d8 ♗d2-g5+ ♔e7-d7 ♗g6-f5+ ♔d7-c7 ♗f5-e4 ♗a6-c8 ♗g5-d2 ♗d6-c5+ ♗d2-e3 ♗c5-e7 ♗e3-f4+ ♔c7-d7 ♗e4-f5+ ♘d8-e6 ♖h7xf7 ♔d7-e8 ♗f5-g6 ♘e6xf4 ♖f7xf4+ ♔e8-d8 ♖f4xc4 ♗c8-e6 ♖c4-c1 ♗e7-f6 b2-b4 ♗f6-d4+ ♔f2-g3 ♔d8-e7 ♗g6-e4 ♗e6-d7 ♖c1-c4) +3.52/42 306)

score for White +3.52 depth 42

Jul-26-20  RandomVisitor: After 28...Bc5:

Lc0 finds 29.Qf3 but suggests 29...Rd8 as best play. The black queen on d4 is potentially trapped, and combined with back rank threats and Nxh6, white has tactical opportunities which can be exploited:


click for larger view

Lc0_0.26.1_384x30-t60-4485.pb:

<19/47 2:25:56> 5,196k 593 <+4.19 29.Qf3 Rd8 30.Re4 Qxd5 31.Nxh6+> gxh6 32.Rg4+ Kh7 33.Qf6 Bf8 34.Qxa6 Bg7 35.Qxc4 f5 36.Bxd3 Qxd3 37.Qxd3 Rxd3 38.Rc4 Rb3 39.Rc7 Kg6 40.Bd2 Bxb2 41.Rc6+ Kf7 42.Bxh6 Be5 43.Kf1 f4 44.Ke2 Ra3 45.Rc4 f3+ 46.gxf3 Ra1 47.Bg5 Rh1 48.h4 Kg6

Jul-26-20  RandomVisitor: The problem move for black was 28...Bc5, maybe better would have been 28...h5:


click for larger view

Lc0_0.26.1_384x30-t60-4485.pb:

<23/51 25:59> 1,124k 720 <-0.21 28. ... h5> 29.Ne5 Qxd5 30.b3 Nf4 31.Re4 Nd3 32.Re3 Bb7 33.Nf3 Nxc1 34.Qxc1 Bc5 35.Rc3 Re8 36.bxc4 Qd6 37.Rd3 Qf6 38.Kf1 h4 39.Qd2 Be4 40.Rb3 Bc6 41.Rd3 g6 42.Qg5 Qxg5 43.Nxg5 Ra8 44.Nf3 Ra2 45.Rd2

Jul-26-20
Premium Chessgames Member
  scutigera: Can we please start Romanizing this name as "Semyon", the way it's pronounced? It's bad enough he had to grow up named "Dvoirys".
Jul-26-20
Premium Chessgames Member
  rodchuck: Despite the gobbeledygook propagated by chrisowen, he inevitably seems to come up with the "correct" move to solve the potd. If he uses no external or engine help, he is obviously (to quote Gerald Abrahams in his book,Test your Chess, Constable 1963, p. 107), a real chess player! Unfortunately I have to address him in the third person, as my Linguee translation software has not yet been adequately updated to enable direct communication....
Jul-26-20  cormier: 28... Bc5? 28...h5 29.Ne5 Qxd5 30.b3 Bb7 31.Nf3 Nxc1 32.Qxc1 Bc5 = -0.43 (27 ply) SF
Jul-26-20  jes47: The obvious 31 Nf7 gives a more elegant ending, and according to stockfish is stronger. 31 ... Kg8 is forced and after 32 Nh6 gh6 (if 32 ... Kh8 then 33 Qf5) 33 Qg3 Qg7 34 Qb8 is overwhelming.
Jul-26-20
Premium Chessgames Member
  eternaloptimist: Like some of the other kibitzers here I thought 30. ♘xh6+ -> ♖g3+ would win the game for white but I was wrong. ♕f3!! has to be played 1st before ♘xh6+. Dvoirys also played the opening well. <rodchuck> LOL 😃 Ur kibitz is hilarious! I just added u to my favorite kibitzers so ur kibitzes will b highlighted. Pls make many more of them
Jul-27-20  mel gibson: <Jul-26-20
Premium Chessgames Member rodchuck: Despite the gobbeledygook propagated by chrisowen>

I have him blocked so I don't see his nonsense posts.

Notice the rules say
<"no spamming, advertising, duplicate, or gibberish posts.">

Why is he allowed to post gibberish?

Jul-27-20
Premium Chessgames Member
  MissScarlett: <Why is he allowed to post gibberish?>

He's a premium member. What's your excuse?

Jul-27-20
Premium Chessgames Member
  jessicafischerqueen:

<mel gibson>

Chris Owen was "grandfathered in" years ago.

What does this actually mean?

Excellent question!

It means he's not owen anyone an explanation.

Jul-27-20
Premium Chessgames Member
  jessicafischerqueen:

<mel gibson>

I should add that I enjoyed your performance in Gallipoli, but not so much in the comedies you did later.

Jul-28-20
Premium Chessgames Member
  fredthebear: Gallipoli and Braveheart were excellent historical-based movies w/a distraught endgame. He gets revenge in The Patriot, but it was a steep price.

Gibson produced a brutal film "Apocalypto" about Mayan civilization that turns out well for one character in a life-and-death battle of survival. It's not a movie for family night.

Apocalypto quotes Will Durant: "A great civilization is not conquered from without until it has destroyed itself from within."

Jul-28-20
Premium Chessgames Member
  jessicafischerqueen:

<fred> Yes Apocalypto is another fine movie from User: mel gibson

Jul-28-20
Premium Chessgames Member
  fredthebear: <Chris Owen> The Sherminator. Who knew? https://brobible.com/culture/articl...

(FTB is probably showing his age. A re-run of "Mad Max" would be my choice.)

search thread:   
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