chessgames.com
Members · Prefs · Laboratory · Collections · Openings · Endgames · Sacrifices · History · Search Kibitzing · Kibitzer's Café · Chessforums · Tournament Index · Players · Kibitzing

Alexey Borisovich Vyzmanavin vs Vadim Ruban
Chigorin Memorial-A (1989), It, Sep-??
Queen's Gambit Declined: Orthodox Defense. Rubinstein Variation (D61)  ·  1-0
ANALYSIS [x]

FEN COPIED

explore this opening
find similar games 1 more Vyzmanavin/V Ruban game
sac: 23.Ne4 PGN: download | view | print Help: general | java-troubleshooting

TIP: You can get computer analysis by clicking the "ENGINE" button below the game.

PGN Viewer:  What is this?
For help with this chess viewer, please see the Olga Chess Viewer Quickstart Guide.
PREMIUM MEMBERS CAN REQUEST COMPUTER ANALYSIS [more info]

Kibitzer's Corner
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
Mar-08-08  JG27Pyth: Holy smokes... got close. Had it perfectly up to, but not including, 27.Re1! Of course, without Re1 it's not a winning combination... :( but not bad for a saturday for me. 1/4 credit?
Mar-08-08  GMNick: Oh yeah...can't believe I overlooked that simple move!
Mar-08-08  Marmot PFL: I suspected that Ne4 was the move, but the variations are rather long and not obviously winning, at least from my level of ability. In a game I would more likely just play Nxc4 instead with a very good position.
Mar-08-08  TrueBlue: saw it up to Qe3 (didn't expect Kg8). Amazing I got that far. One of those puzzles where each individual move is not difficult, but putting them all together is. The trick was to sacrifice to knight to pin the king, the rest is just technique.
Mar-08-08
Premium Chessgames Member
  johnlspouge: Saturday (Very Difficult): White to play and win

Material: Down a P, with N for B. The White Bc2 pins Pf5 to Kh7. The Rg1 has an open file next to Kh7, and Rh1 is on the same file as Kh7. The Black Qf8 defends Be7, Rf6, and Ph6; the Black Rf3, Pe6, Pf5, and Ph6. The Pf5 and Ph6 are natural targets for a White attack. The Black Nd7 blocks development of Black's Ra8 and Bc8: without a specific reason, White should avoid exchanging it for Ne5.

Candidates (23.): Ng4, Nd5, d5, h5, Nb5, Rg5, Ne4

23.Ne4 (threatening Nxf6+, winning the exchange)

Because of the Ne5, Black cannot decline the sacrifice of Ne4 without losing the exchange.

23fxe4 24.Bxe4+

Black must interpose 24Rf5, or be down at least the exchange, because

24Kh8 25.Ng6+ (threatening 26.Nxf8+)

26Rxg6 26.Qxf8+ Bxf8 27.Rxg6 (threatening 28.Rhg1 29.Rg8#).

Defenses based on moves of Kh8 and Ph6 are too slow. Because the White Pd4 prevents Nd7 from blocking the Bc2 on the b1-h7 diagonal at d3, Nd7 must defend g8 from f6. The only three defenses preventing 29.Rg8#, other than those already mentioned, are therefore

(1) 27Nf6 Rxf6

(2) 27Bg7 28.Rhg1 Nf6 29.Rxg7

(3) 27Be7 28.Rhg1 Nf6 29.Rxh6 Nh7 30.Rxh7#

If Black does interpose 24Rf5, however,

24Rf5 25.Bxf5 exf5

[25...Qxf5 26.Qg3 27.Qf8 Qg6+ 28.Kh8 Nf7+ wins Qf8]

26.Ng6 Q moves 27.Nxe7

Black is down the exchange if he does not recapture, so

27Qxe7 28.Qxf5+ Kh8 29.Rg6 (threatening 29.Rxh6+ and 29.Rhg1)

Black has two possible defenses: (1) 29Qf8 and (2) 29Nf8.

(1) 29Qf8 30.Qe6 (threatening 31.Qg8# or 31.Rxh6+ 32.Rhg1+)

30...Nf6 31.Qxf6+, and Black is down the exchange.

(2) 29Nf8 30.Rxh6+ Nh7 31.Qg5, with several threats:

32.Qxe7, 32.Qe5+, 32.Qe8+, 32.Rhg1 and the maneuver Rh1-g1-g5-h5, winning the Nh7. Black is down the exchange again.

Time to peek. Interesting. I preferred 24.Qxe4+ at first, because it nails Rf5 down with the mate threat. Because I did not find 27.Re1, I could not justify the move 23.Ne4. I will have the computer look at 24.Bxe4+. Time to check the kibitzing.

<dzechiel> said it very nicely: 23.Ne4 has to be the right move, because it activates Nc3, the only piece not directly attacking the Black K-side. It took me some time to see the right candidate, but I <can> be taught: it is the same motif as Wednesday's puzzle, Quinteros vs Christiansen, 1981, and even the same move (Ne4). The pin on the Pf5 degrades Pf5's protection of e4, enabling the N to move <onto> the diagonal of the pin.

Mar-08-08
Premium Chessgames Member
  patzer2: For today's difficult Saturday puzzle, the clearance sacrfice 23. Ne4!! opens up the diagonal for a winning attack on the Black King's weakened castled position.
Mar-08-08
Premium Chessgames Member
  johnlspouge: Toga II 1.3.1 evaluates 23.Ne4 fxe4 24.Bxe4+ at about -2.2, because Black can improve on my lines with

23.Ne4 fxe4 24.Bxe4+ Kh8 25.Ng6+ Rxg6 26.Qxf8+ <Nxf8>,

instead of the move I gave, 26...Bxf8.

On the other hand (cold comfort), Toga confirms as best play [ply 15/56, time 00:24, value +2.53] the line I gave after

23.Ne4 fxe4 24.Bxe4+ Rf5

Again, the theme of bottling up the Black Q-side with the Nd7 was paramount.

Mar-08-08
Premium Chessgames Member
  johnlspouge: <<Marmot PFL> wrote: In a game I would more likely just play Nxc4 instead with a very good position.>

Toga II 1.3.1 evaluates 23.Nxc4

[ply 17/53, time 09:15, value +0.90].

23.Nxc4 b5 24.Nxb5 Ba6 25.a4 Bxb5 26.axb5 Rc8 27.Ne5 Nxe5 28.dxe5 Rg6 29.Rxg6 Kxg6 30.Rg1+ Kh7 31.Kb1 Qf7 32.Bb3 Rd8 33.Rg3 Rc8 34.Bc4 Rg8 35.Rxg8 Qxg8

It evaluates 22...Nxe5 as [ply 17/53, time 09:15, value +0.90] and 22...Kh7 as [ply 17/56+, time 12:12, value +1.41]. Toga took 12:12 to find 23.Ne4, something outside of kickboxing that might make a human feel good. The best line for 23.Ne4 was

23.Ne4 fxe4 24.Qxe4+ Rf5 25.Ng6 Qf7 26.Nxe7 Qxe7 27.Re1 Qd6 28.Qxe6 Qf4+ <29.Re3> Nf8 30.Bxf5+ Qxf5 31.Qe7+ Kh8 32.Rg1 Ng6 33.Qd6 c3 34.bxc3 Qe4,

with the first move differing from the game line emphasized.

Mar-08-08  wals: Noting think:- "Double attack is the fundamental tactical weapon." ..........GM Jonathon Tisdall

forward to TPOTD

White is down a pawn and a bl bishop for a knight.

Knight g4 throws in a double attack, how does black respond? Cannot take with f5 as that gives check.
Knight x f6, then Knghtxf6, or Bxf6, or Qxf6 no advantage there that I can see.

23.h5...Kh8 24.Rg6...Rxg6 25.Nxg6+ - black loses the queen. what a nice ending

PM=

Not even close.

Brain score L0.01 R 0.01

.

Mar-08-08  xrt999: I think that black should have played 22...Nxe5.

After 23.dxe5 Rf7 24.Qxc4 Bd7 the game is even, materially and spatially. The thought of Ne4 now does not exist.

The move 22...Kh7 pins the f pawn by lining the king up with the bishop, allows the powerful 23.Ne4; I cant see any reason for playing it.

Mar-08-08  wals: Alexey Vyzmanavin - Vadim Ruban, Sochi (Russia) 1989

Analysis by Fritz 11:

Depth 41 time 18min41

1. (2.01): 23.Nc3-e4 Nd7xe5 24.Ne4xf6+ Qf8xf6 25.d4xe5 Qf6-f7 26.Qf4xc4 Bc8-d7 27.Kc1-b1 Ra8-c8 28.Qc4-f4 Bd7-c6 29.Rh1-h3 Bc6-d5 30.Bc2-b3 Bd5-e4+ 31.Kb1-a1 b7-b5

2. (1.16): 23.Ne5xc4 b7-b5 24.Nc4-e5 Ra8-b8 25.Kc1-b1 Nd7xe5 26.d4xe5 Rf6-f7 27.Rh1-h3 b5-b4 28.Nc3-e2 Rf7-g7 29.Rh3-g3 Rg7xg3 30.Ne2xg3 Bc8-b7 31.Ng3-h5 Rb8-c8 32.Rg1-g7+

(, 09.03.2008)

Mar-08-08  zatara: what about 23.Qg5?
Mar-08-08
Premium Chessgames Member
  johnlspouge: <<wals> wrote: Analysis by Fritz 11>

(Although the depth of search is probably the main difference,) Fritz appears to be more of an optimist than Toga :)

Do computers have personalities, and more importantly, are they left- or right-chip dominant? ;>)

As someone who discovered their right brain very late in life, I enjoy reading about your (not so) private obsession, <wals> :)

Mar-08-08  zb2cr: <johnlspouge>,

Re: your comment about computers having personalities.

In this case, it's due to details of how the program's scoring function is written. Computers are just idiots that count on their fingers. However, since they have a lot of fingers and count VERY fast, the end result can look like intelligent cogitation.

Mar-08-08
Premium Chessgames Member
  johnlspouge: <<zb2cr> wrote: Computers are just idiots that count on their fingers. However, since they have a lot of fingers and count VERY fast, the end result can look like intelligent cogitation.>

So, <zb2cr>, how many fingers does a computer need to pass its Turing test? ;>)

Mar-08-08  wals: White to move and draw. A puzzle by Reti.


click for larger view

Mar-08-08
Premium Chessgames Member
  johnlspouge: <<wals> wrote: White to move and draw. A puzzle by Reti.>

I have seen Reti's puzzle before, but: Nice! (LB 1 RB 0, as usual for me.) It never ceases to amaze me how imperfect human memory is, and yet, one does manage to retain something.

"Education is what you have left over when you have forgotten everything you have learned." - Anonymous (according to 15-th edition Bartlett's Familiar Quotations)

Various internet sources attribute the quote to Albert Einstein and others, but who are you going to believe?

Mar-08-08
Premium Chessgames Member
  Breunor: goldfarbdj: GMNick: 21. Qg4, with threat of mate on both g7 and g8 -- black has no good way to defend both squares. Hence 20. ... Qd8, defending the back rank.

Thanks Goldfarbj, I couldn't figure this out either!

Mar-08-08
Premium Chessgames Member
  dzechiel: <wals: White to move and draw. A puzzle by Reti.>

When I have seen this puzzle it started like this with white to move and draw:


click for larger view

Mar-08-08  wals: <johnlspouge>
I just had a read re the Turing test. 2030 is set to be a prime date for AI. You mentioned you found your right brain late in life. Is it true that you are really an intelligent piece of machinery and are just learning to fantasise?
Mar-08-08
Premium Chessgames Member
  johnlspouge: <<wals> wrote: 2030 is set to be a prime date for AI.>

Is that when they plan to make the Bride of AI? (And you thought CG's puns were atrocious...)

<Is it true that you are really an intelligent piece of machinery and are just learning to fantasise?>

Whatever you do, please, please, don't ask me to divide by zero :)

Mar-08-08
Premium Chessgames Member
  DarthStapler: I didn't even see that
Mar-08-08  jperr75108: Interesting problem.
Mar-10-08
Premium Chessgames Member
  kevin86: Reti's problem is a perfect example of chess tactics: White needs to either shepherd his pawn home or stop black's. Black must stop white's pawn AND promote his own.

The need for black to perform two tasks while white needs only one is the trigger for white's miraculous save. Black must use two tempi to capture the c-pawn while white can get inside "the square" of the h-pawn.

Mar-10-08  012: Friday puzzle <44. ...?> Mar-07-08 P Enders vs Uhlmann, 1978
search thread:   
< Earlier Kibitzing  · PAGE 2 OF 2 ·  Later Kibitzing>
NOTE: You need to pick a username and password to post a reply. Getting your account takes less than a minute, is totally anonymous, and 100% free—plus, it entitles you to features otherwise unavailable. Pick your username now and join the chessgames community!
If you already have an account, you should login now.
Please observe our posting guidelines:
  1. No obscene, racist, sexist, profane, raunchy, or disgusting language.
  2. No spamming, advertising, duplicate or nonsense posts.
  3. No malicious personal attacks, including cyber stalking, systematic antagonism, or gratuitous name-calling of any member Iincludinfgall Admin and Owners or any of their family, friends, associates, or business interests. If you think someone is an idiot, then provide evidence that their reasoning is invalid and/or idiotic, instead of just calling them an idiot. It's a subtle but important distinction, even in political discussions.
  4. Nothing in violation of United States law.
  5. No malicious posting of or linking to personal, private, and/or negative information (aka "doxing" or "doxxing") about any member, (including all Admin and Owners) or any of their family, friends, associates, or business interests. This includes all media: text, images, video, audio, or otherwise. Such actions will result in severe sanctions for any violators.
  6. NO TROLLING. Admin and Owners know it when they see it, and sanctions for any trolls will be significant.
  7. Any off-topic posts which distract from the primary topic of discussion are subject to removal.
  8. The use of "sock puppet" accounts to circumvent disciplinary action taken by Moderators is expressly prohibited.
  9. The use of "sock puppet" accounts in an attempt to undermine any side of a debate—or to create a false impression of consensus or support—is prohibited.
  10. All decisions with respect to deleting posts, and any subsequent discipline, are final, and occur at the sole discretion of the Moderators, Admin, and Owners.
  11. Please try to maintain a semblance of civility at all times.
Blow the Whistle See something that violates our rules? Blow the whistle and inform a Moderator.

NOTE: Keep all discussion on the topic of this page. This forum is for this specific game and nothing else. If you want to discuss chess in general, or this site, visit the Kibitzer's Café.

Messages posted by Chessgames members do not necessarily represent the views of Chessgames.com, its employees, or sponsors. All Moderator actions taken are at the sole discretion of the Admin and Owners—who will strive to act fairly and consistently at all times.
Spot an error? Please submit a correction slip and help us eliminate database mistakes!
<This page contains Editor Notes. Click here to read them.>
This game is type: CLASSICAL (Disagree? Please submit a correction slip.)

Featured in the Following Game Collections[what is this?]
23.? (Saturday, March 8)
from Puzzle of the Day 2008 by Phony Benoni
White to move after 22...Kh7
from Imagination in Chess by Everett
23.? (Saturday, March 8)
from POTD Queen Gambit Declined + Accepted by takchess
negru nu dezvolta corect
from cristeatutu's favorite games by cristeatutu
23. Ne4!!
from Weakened Castled Position by patzer2
Hard Daily Puzzles
by PositionalTactician
23. Ne4!!
from Weakened Castled Position by Jaredfchess
Hard Daily Puzzles
by Jaredfchess
23 nsac sets up pin
from TacticalArchives by villasinian
iywo's favorite games
by iywo
23.? (March 8, 2008)
from Saturday Puzzles, 2004-2010 by Phony Benoni


home | about | login | logout | F.A.Q. | your profile | preferences | Premium Membership | Kibitzer's Café | Biographer's Bistro | new kibitzing | chessforums | Tournament Index | Player Directory | Notable Games | World Chess Championships | Opening Explorer | Guess the Move | Game Collections | ChessBookie Game | Chessgames Challenge | Store | privacy notice | contact us
Copyright 2001-2019, Chessgames Services LLC